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Heat Transfer Products Munchkin R1 (Revision 1) Boiler


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Overview of the Munchkin R1 (Revision 1)

Manufactured by Heat Transfer Products Inc. (HTP), the Munchkin R1 is a residential ultra-efficiency boiler offering up to 95.1 percent AFUE. This Energy Star-certified series has five models ranging in heating capacities from 50,000 to 199,000 BTUs.

Available as a wall- or floor-mounted unit, the R1 has a lightweight design geared toward providing easy installation, as well as zero clearance to combustibles. The R1 also offers four different venting options—vertical, unbalanced, sidewall and concentric—for flexible installation and airflow.

Indirect water heater integration, a durable 316L stainless steel heat exchanger and an outdoor reset that detects temperature changes outside and adjusts the interior temperature accordingly are additional features of this unit.

Consumer Reviews of the Heat Transfer Products Munchkin R1 (Revision 1)

Compare to Other Heat Transfer Products Boilers:
Popularity:
#2  of 3 Heat Transfer Products Boilers
2 of 5 stars 49 reviews

  • Very Satisfied
    7
  • Somewhat Satisfied
    4
  • Neutral
    8
  • Somewhat Unsatisfied
    1
  • Very Unsatisfied
    29


Date created: 2015-05-11 Name: joe cassidy
Location: San Francisco, CA

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

Review:
"Lawsuit"
Has anyone filed a class action lawsuit against this company? If not, let's all get together asap.


Date created: 2015-04-12 Name: D. Benjamin
Location: Belmont, MA

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

Review:
"Munchkin boiler is awful"
We had a Munchkin boiler installed in our home in late 2007 at a cost of $10,000 (boiler and labor). Less than 7 1/2 years later (after spending considerable amount of money to have it periodically repaired when it stopped working) it completely died and we had to have a new boiler installed - now at a cost of $12,000. The Munchkin Warranty document begins "Twelve year warranty to assure your complete satisfaction." However, when one reads the fine print, it appears that there is no basis to make a claim under this warranty. We feel that the product was a rip-off and we're not optimistic that Heat Transfer Products will do anything to compensate us for the loss.


Date created: 2015-03-09 Name: Mont
Location: Idaho Falls, ID

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

Review:
"Junk, junk, junk"
Their highly reliable field starter is shit. Unless you don't mind replacing it every six months for a nickel a piece. Lousy, lousy design. And they know it.


Date created: 2014-12-30 Name: P. Conway
Location: Ellsworth, MI

Satisfaction Rating:

4 of 5 stars Somewhat Satisfied

Review:
"A little picky"
I've had a Munchkin T-140M for ten northern Michigan winters, and generally it has done me well. I finally replaced the blower motor this year. It was installed with concentric venting and there is a bit of reversion evidence inside the boiler, but I have since put an extension on the exhaust vent to hopefully minimize this. I have had the hx and burner cleaned and inspected most years. It rumbled a bit last year, and I finally traced the noise back to a shredded swirl plate which was replaced along with the burner gasket. There's no more rumble. Today, though, the display began reading "nc", which I've read is due to voltage problems. It still heats and runs, but the readout won't display anything. How long will it run in this condition, and should I order a new control board? Why would a voltage problem develop randomly on a given day? Homer? Steven? You guys out there?


Date created: 2014-07-16 Name: Jerry A. Rice
Location: Hudson Valley, NY

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

Review:
"This is one Company and Boiler to Stay Clear of."
I have had two Munchkin Boilers installed in my new home over a 5 year period. The first boiler sprang a leak and had to be replaced -at my cost - of more than $2200. Within a two year period, the second Munchkin began leaking around the water jacket, and had to be replaced. At this time I upgraded to another Boiler, at the cost of $3000. I appealed to the htp company, seeking replacement costs and labor costs for the shoddy piece of equipment they sold me. I got a reply, saying they do not pay for labor and installation. The installer no longer carries this brand, due to the lack of support and questionable equipment this company offers. I would strongly advise everyone to seek out another company for your piece of mind, and for your wallet's sake.


Date created: 2014-06-17 Name: Doug Mitchell
Location: Medicine Hat

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

Review:
"Junk"
I bought a home that has one installed and i'm pulling my hair out. The wife gives me shit for no hot water I phone the people who installed it and give them shit I hope they are phoning the people who built the thing and giving them shit. Nothing is worse than arguing with the wife on why I haven't replaced the thing and my answer to her is I'm sure they can fix it. I'm having my reservation now if that can be done after some three years of this crap in our house. Now I have the $10,000 dollar question what to replace it with.


Date created: 2014-05-15 Name: J. Reisman
Location: Cambridge, Ma

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

Review:
"A Piece of Junk"
I replaced a 50 year old American Standard furnace that always worked with this unit. It was the biggest mistake I ever made. We installed this unit in August 2005. We have had major repair bills since the second year. The repair bills have been anywhere from $575 to $1,000. The swirl plate was eaten up several times. The last straw was this winter, when after a $1000 repair the unit went out while we were away. We returned to frozen pipes and about $50,000 worth of damage. We had a representative from Munchkin out during the second year and he was worthless and felt they were not responsible for this piece of garbage. Now I have to bite the bullet and replace it after 8 1/2 years.


Date created: 2014-04-02 Name: Mike
Location: Huxley, ia

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

Review:
"Home radiant heat system"
I also agree with those that say this unit is very expensive to maintain. With all the cost I pay every year I could buy a new boiler. Every year there is new issue. Munchkin did a great job of selling small but a bad job of providing reliability. Don't buy a munchkin.


Date created: 2013-12-18 Name: M.Novis
Location: phillipsburg,nj

Satisfaction Rating:

4 of 5 stars Somewhat Satisfied

Review:
"I must be the lucky one"
I've Installed my Munckin boiler about 12 years ago and to this day it has run fine. It does have a slight hum for maybe a second or two when the unit first fires but that goes away. After removing my old boiler and installing the new Munchkin boiler it would not fire on my initial attempt. I rechecked my work and checked the gap on the electrode and still the boiler would not fire. I called the manufacturer the next day and explained the problem. They stayed on the phone while I made an adjustment to the electrode gap. they wanted me to open it up further. I did that an within a minute I had the boiler running. It has run for all of these years without a problem that was until last night 12/17/13 when my wife told me we had no hot water. I had the F009 fault and tried a reset several times with no luck. the fan ran and I could smell propane. I removed and opened the electrode slightly and the boiler lit. From looking online it looks like there might be a newer electrode with a slight change to it that I might buy just to eliminate future problems. I say I'm lucky because I rarely even look at this boiler and it just keeps running. Customer service was great back when i bought the unit I can't speak for today but I was glad to be able to get someone on the phone quickly that could actually help. Reading up on the maintenance that i should be doing now has me thinking. I'm afraid to touch the unit because it has run so well. My luck usually runs out when I touch things that are working fine. I rated the unit somewhat satified because of the slight hum if not for that I would give it 2 thumbs up.


Date created: 2013-12-03 Name: C. Askren
Location: South Starksboro, VT

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

Review:
"LEMON!!!! And Non-existent Customer Service"
Dear Mr. Daniels: I am again reporting that the number of repairs within the short time I have lived here at this home --which was a brand new home in which your new Munchkin T80M was installed in 2005--has been excessive and a certain indication that this boiler is a lemon. Our plumber just replaced the blower/fan unit yet again. The history of replacing and costs for that one part is as follows: 11/27/2006 - no charge under warranty 1/9/2009 - $525 (part). $300 (3 hours labor--emergency weekend break down, before I installed my wood stove) 9/14/2009 - replaced blower motor again, factory rep called $95 (labor) 11/9/2011 - $520 (part) blower replaced again, $130 (labor) 12/2/2013 - $535 (part) blower motor again, replaced $93.75 (labor) I want to make it clear that this is just the tip of the iceberg, as numerous other parts have been replaced repeatedly, and to the tune of thousands of dollars in just these few years. I have records of nearly all of these repairs and it is the most shocking set of repairs I have ever experienced with any home or boiler furnace I have owned. I have owned 9 homes in my life. None of friends or family have EVER had this kind of problem with a Munchkin boiler. Despite my dutiful paying for repair after repair, this furnace continues to go off and requires restarting so often that I am afraid to leave my house in winter for more than a day--for fear of losing my pipes or my pets to the cold. Not more than a few days pass between times when I have to restart the furnace due to some error code. As I have told you before, that is how the furnace has been from the time I moved into this house to the present day. I am requesting that your company replace this furnace. It is a lemon, and has proven to be so many times over. And yes, the vent pipe was fixed as you stated it must be last summer. This machine is a lemon. I am broke from spending so much money on this piece of trash. We will not afford Christmas presents at my house because of this, and I will be sure to let the entire world to know how your company has refused to acknowledge the problem. This is a shameful way to treat a woman who works very hard for her money and who has grandchildren visiting often. If I do NOT receive a fair treatment regarding this latest repair, I will be contacting the Vermont Attorney general's office and reporting this as consumer fraud.


Date created: 2013-10-29 Name: Dave
Location: North Idaho

Satisfaction Rating:

3 of 5 stars Neutral

Review:
"Boiler Troubles and Service (Lack Of)"
Purchased in 2004 and it worked great with DHW and hydronic heat. Then started getting non-start codes and shut downs. Told to clean spark igniter and that helped for a while. Then it wasn't getting water (leak somewhere?) and it went downhill from there. So-called service personnel didn't even bother to disconnect power when they started looking at it and got shocked. I should have shown them the door right then and there. But they were the only ones available. They didn't have a clue what they were doing and charged me for a brand new recirculation pump and within a week, it seized up. They spent over 3 days trying to figure out the problem and they said it was the outdoor sensor. They disconnected that and the furnace worked for about 24 hours. Then it started blowing water from the overflow and running a temperature (fever and vomiting, I called it), and they said they were too busy to come look at it again. I then called a really good service tech I knew and within 45 minutes had the boiler working perfectly. Overall, the Munchkin has been a really good system but this fall, it started leaking water from the boiler area and I'm suspecting a leak in the exchanger. If I can get my service tech to service it, I'll keep the Munchkin. If not, I'll toss it and go with something different, as long as he will service it. Had I known that when I bought the system that the installer wouldn't service it, I would have never bought it at all. I was dumbfounded at that. So, I advertise for those crooks whenever I get the chance. The word will spread and pretty soon they'll have to leave town because of their poor reputation. They earned it. Thanks for this website to help us "neophyte" HVAC morons understand and share our experiences. I wished that you were around ten years ago so I could have saved a bunch of headaches and money. I'm going to give HT Products a call to see if they'll honor the warranty and their decision will pretty much decide my next purchase. Darned good product but lousy service.


Date created: 2013-10-16 Name: Jay Reed, home owner
Location: Kansas City

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

Review:
"Down Drafts From Exhaust Damage Unit... But Fix With $35 Fernco In-Line Damper"
I have read numerous reviews of the Munchkin boiler, and almost all the problems arise from corrosive exhaust gas damaging the swirl plate. I placed my intake 10 feet from the exhaust, but still had my swirl plate destroyed by corrosive gas and the damaged swirl plate material was ingested into the burner assembly. Causing all kinds of problems. It is important to note that I could have put my intake 100 feet from my exhaust, and I still would have had this problem. Which was wind downdrafts which forced the corrosive exhaust gas back into the system. Destroying the swirl plate and many metal components (they looked rusted). To remedy the problem, I installed a Fernco Plumbqwik 4-inch P1056-44 in-line damper, and the downdrafts were virtually eliminated. What I found was that the downdrafts destroyed my swirl plate, which was ingested into the burner and spit out all over my heat exchanger. Once you install the in-line damper, be sure to remove your burner (just 4 or 5 screws) and shake out all the detritus from your destroyed swirl plate! Then vacuum it, and reattach. Finally, if your boiler is in the basement but it exhausts on the first or second floor, you may want to consider a drain tube in the crook of the exhaust pipe as it goes "north". Once the blower stops, the condensate will migrate down and could cause problems unless it is drained off. The whole idea is to get rid of corrosive gases and liquids. I have had the unit since 2006. The swirl plate was "eaten" within 2 years and I was pissed. But since I installed the damper and perform yearly maintenance, you can suck in dirt and Japanese yew needles in a wind storm! The boiler has performed flawlessly. Best of luck to all who have installed them. You can make them work as they were intended.


Date created: 2013-10-07 Name: D. Johnson
Location: Sula,Mt

Satisfaction Rating:

4 of 5 stars Somewhat Satisfied

Review:
"Munchkin T80M Exhaust Leak"
I have a 2004 T80M with an exhaust leak. My detector reads between 30 and 80 ppm inside on rear of HX when running. It's my understanding that HTP had a rear exhaust leak on some 2004 T50 and T80M boilers. Does Homer, Nevada have any input on this. I would think any company above would damage this sophisticated blower motor.


Date created: 2013-10-07 Name: Kevin B.
Location: Northern Michigan

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

Review:
"Short Lived Quality!!!!"
Having paid $4000.00 + accessories for a boiler that is fuel efficient, is an investment that is not taken lightly. I would expect a life of approximately 20 years. I have had mine for almost 13 years. First 2 were great, then a thermistor. No problem, then a few more years with no problems. All the while, annual maintenance costing $150.00+. Then last December 28th, a combustion blower decided to self destruct due to exhaust gas recirculation from outdoors with nothing open to get parts. Now for the last 6 months, we've been getting f09 codes more and more often. Htp doesn't know what else I can do other than replace the flame rectification probe (done 2 times) and igniter (done) among lots of other things (done). Rectifier probe ionization readings are lower than they should be (0.4 - 0.5) when it (should be 1.4) codes out but relaying this info to them has been totally fruitless. They got my money, so I really believe they don't care! I don't think I could buy "anything" from htp again. Update: F09 codes can be from a number of issues such as : ! ** most all of the directions to cure these problems can be found in your owner/installation manual (very important to read!!). A boiler that was not leveled at installation (improper condensate drainage). 2. A plugged condensate drain (found in maintenance section). 3. Dirty flame rectifier probe (flame sensor) from rich burn (sooting) or condensate pooling in combustion chamber (steaming upon ignition) contaminating flame sensor (use scotch brite pad to clean and reuse). 4. Loss of/diminished electrical ground (press s-4 reset for 6 seconds till it starts flashing then repeatedly push till you get #7 for flame rectification/ionization mili-amp readings, you should have readings of 3.8 - 4.2 at high fire and 3.0 - 3.4 at low fire. 5. Pull your controller board out and look it and your electrical plugs over very closely for corrosion (green patina) or dark (overheated) marks on both sides of them. Do not ever start turning any gas adjustment screws on your gas valve. Use common sense and think things thru before you do anything! It is important to have the fuel mixture adjusted on a new installation. These are good boilers but just really sensitive. One other thing is to physically watch your boiler intake/exhaust termination outdoors while its running (cool temps/weather make visible vapor) to make sure the exhaust is not swirling around and getting sucked back in the intake. It happened to me even when installed to manufacturer's recommendations and dryer vents too!


Date created: 2013-10-03 Name: Genene C Hill
Location: Kaysville, UT

Satisfaction Rating:

2 of 5 stars Somewhat Unsatisfied

Review:
"Will Not Ignite--No Code"
Purchased a 199M in 2006. It failed in 2010. It was difficult, but I finally got a Heat Transfer Products representative to come out and look at the installation. He told me up front that he was not an advocate for the consumer, but for the installer. After looking over the situation, he said that the boiler had failed because of incorrect installation and that the warranty would not be valid. I had him work with the installer and set up a correct installation plan, then the installer put in a new 199M with the HTP representative checking on the installation and I had him come for a final review after the installation was complete. I then asked him if the warranty would be in effect if we had a problem because it was now installed properly and he hedged and would not commit. We have had the new boiler in since February 2010. Yesterday, October 2, 2013, when the thermostat kicked the boiler on, I noticed after few minutes that the radiators were not heating up. I checked the boiler and the digital pad only registered the current temperature of the room and there was no error code. Today, October 3, a technician from the installation company came to fix the problem. He checked it to make sure that it wasn't working. Read the manual, scratched his head, called several people, then told me he didn't know what was wrong but would have someone who knew more about the Munchkin that he did come out tomorrow morning. My husband has advanced Parkinson's disease and is not physically able to handle cold temperatures or stressful situations. I have all I can do to care for him without the stress of having the boiler go out. I am concerned because before they decided to replace the last boiler, they replaced quite a few parts that did not fix the problems at a high cost. I am now afraid that the technician who comes tomorrow will begin replacing parts and the cost will escalate exponentially. What options do I have? Is there a boiler that would be more reliable? In 2006 I replaced an old gravity feed boiler because it was inefficient and the monthly heating bills were very high. In retrospect, it would have been better to keep the old boiler because I have now spent over $16,000 and that is not likely the end of it. Any help would be appreciated.


Date created: 2013-08-22 Name: Homer
Location: Nevada

Satisfaction Rating:

3 of 5 stars Neutral

Review:
"I'm a Heating Professional"
S. Rowe-Catskill, New York---With respect due you. I can't tell you how many times that I've heard, "I'm a heating professional". I'm not impressed. Over 30 years, I've made a lot of money fixing bad installations by heating professionals. I know that there are good technicians out there and maybe you are one. Also, touring the factory doesn't qualify for anything but a nice trip. Mr. Rowe, read all the post. There maybe something that you're missing. There's no reason that you should be having the kind of difficulty that you've expressed. You probably didn't fix the cause of your problems in the first place and just replaced parts. Hoping that it would fix it (I've done that myself). So, symptoms re-occur. There is a lot written in these posts on F09 error code. Did you replace the burner tube gasket? How 'bout cleaning--10yrs! Yipes! The Catskills, a lot of thunderstorms there and lightning. You know that you can be 6 miles from a lightning strike and it could affect you. Do you have computer grade surge protection on your boiler? What about a line conditioner? Look, there are so many things that could be wrong. You just haven't nailed it on the head, yet. Read the posts.


Date created: 2013-08-05 Name: S. Rowe
Location: Catskill, NY

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

Review:
"Yet Another Expensive Repair"
About 10 years ago, when I was a heating professional, I installed my Munchkin 80M boiler in my home. Efficiency of the Munchkin was much better than the unit it replaced, but the hidden cost was outrageous repair bills. I've had continuous issues with the poor blower design and subpar control board. Approximately every 2 years, I have to replace one or the other of these. I've checked combustion, verified gas pressure, voltage, grounding, piping, etc. over and over again but the bloodletting doesn't end. Now my control board failed again. Once again, the boiler lights off but fails to prove flame and F09s. I've cleaned all my connections, checked pressures and replaced the flame sensor to no avail. Now I'm off for the 45 minute drive to the nearest supplier that carries parts for this boiler, to shell out several hundred dollars again for another P.O.S. control board that will no doubt fail in 2 years. If I had the money, I'd have replaced the boiler years ago. Unfortunately I was hurt at work and am now disabled and retraining into a new field, so my family and I are stuck in this ongoing hell until someday when I can finish retraining and get a new job that will pay me well enough to afford another boiler. I don't trust this boiler and would never recommend it to anyone. I feel that HTP had a great opportunity to step up to the plate with customers and give them an upgrade option to a better boiler instead of forcing their customers to be unpaid beta testers for a faulty product. Had Heat Transfer Products done a good job backing their product and paid for upgrades or recalled this line, I would have endorsed them completely. It's a shame because I bought this boiler after touring their factory and meeting some of their key people. I really felt that they had a top quality product. I still feel the design is solid, it's a fairly common design that many manufacturers use these days. The difference is in the quality of components.


Date created: 2013-06-12 Name: Geoff Marshall
Location: Little Deer Isle, ME

Satisfaction Rating:

3 of 5 stars Neutral

Review:
"Kaput"
The 140m, never a stellar performer, has had it. Perforated heat exchanger behind the target refractory. We have a private well with excellent water: ph 6.5, 5 grains, no sodium. No other plumbing component has failed in the last 10 years except a hose bib froze because we forgot to remove the hose. Since I'm only 8 years in with the 140, HTP sent me a replacement Revision 2 model for only $1000. Can't say I'm jumping for joy because the unit they sent is FOUR YEARS OLD. That's right! The unit has been sitting at the factory for FOUR YEARS. There are footprints and dust on top of the box. I'm seriously flabbergasted! Should I install this or should I sell it and buy a Rinnai 80i. I'm completely out of ideas on this subject at this point.


Date created: 2013-04-30 Name: Darshan Suri
Location: North Syracuse, NY

Satisfaction Rating:

5 of 5 stars Very Satisfied

Review:
"Model 80M-R2"
I have 3 years old boiler. During first year, it took the supplier a week to fix the leak. Even manufacturer's rep had to come to supervise the fix. Again in December 1212 leak is developed and I have spent $780.00 but leak is not fixed. Manufacturer's rep came and examine the boiler and said nothing is wrong with the unit. Need replacement of vent collar. The local company who supplied and installed is asking $875 plus tax. The boiler unit itself is under 12 years warranty. Any one is welcome to rescue me from these butchers or I should throw the unit and get some thing which is more reliable and average technician may be able to handle it.


Date created: 2013-04-10 Name: arron
Location: Cincinnati ohio

Satisfaction Rating:

5 of 5 stars Very Satisfied

Review:
"Heat transfer products"
I'm not shocked to read some of these poor reviews. Unfortunately I at one point lacked the ability to install these units correctly, which caused me a lot of issues. I pretty much gave up on the boiler. A different company convinced me to go to the training facility at heat transfer. Since then I have put in over 200 of their boilers with only 2 small issues. If installed correctly, it is by far the best boiler you can buy! I have made tons of money, thanks to this boiler. I strongly recommend it to anyone who wants to save on energy bills. I wish I could help all who have these boilers. People, who don't know how to install these, should stop. There only hurting the customer. Good luck to all, try to call a Rep for heat transfer and find a qualified installer. Thanks.


Date created: 2013-04-03 Name: TVD
Location: Northern Utah

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

Review:
"Buy a Heat Transfer product and the nightmare will begin"
In the past ten years I've had three Voyagers and two Munchkins installed. These were all Heat Transfer Product, “state of the art”, high efficiency boilers. What a nightmare! These products are unreliable, poorly designed and extremely frustrating. The customer support is horrible and I believe the warranty is useless. I would recommend anyone looking for a boiler to do anything but buy a Heat Transfer Product. The sad thing is that this company is a terrible example of “Made in America” quality.


Date created: 2013-01-31 Name: Steve
Location: Plainfield NJ

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

Review:
"A Plumber's Cash Cow"
Reading this collection of comments suggests to me that the Munchkin boiler product has been an expensive nightmare for those of us whose day job does not involve having a technical plumber's certification. a quality product should not require me to have the Fault Code Book taped to my utility room wall and it should not create an annuity sufficient for the intaller to send his kid to college.


Date created: 2013-01-28 Name: J Brown
Location: Menominee, MI

Satisfaction Rating:

5 of 5 stars Very Satisfied

Review:
"Homer, Steven…. huge thank you !!"
With any luck, problem has been resolved. If this is the case (and I believe it is), your comments have been *spot-on*. Unit has been functioning flawlessly for the past 72 hours. (Nice to have it back - I owe you guys a beer). My issue, which I also believe is the cause of many other customer review complaints, insufficient grounding of the burner to the faceplate cover. Your comments and additional research led to better understanding of the rectifier probe (flame sensor) circuit. The controller provides an AC-current signal to the rectifier probe. Dissimilar metal structure of the rectifier probe converts the AC- current into a DC-current, which is conducted to ground, but only if a flame is present. Ionic particles within the flame atmosphere provide electrical continuity, completing the closed circuit to ground via the burner. Of course, if the burner is not properly fastened (grounded) to the faceplate (via screws), the electrical circuit remains open, causing unit malfunction. Through time (ten years, in my case), the refractory material between the burner and faceplate becomes slightly deformed, which allows an air gap and particulate contamination to interfere with proper grounding of the burner. Resolving this issue, each burn cycle, I now have a solid 3 to 5 microamp connection (relative to flame size). Your maintenance procedure to change the burner gasket properly reseats the burner and screw assembly, which reinsures a grounded connection. Proper grounding of the burner seems to also resolved my issue of the rumbling vibration during start-up… but, I still have the occasional French- horn entertainment during low modulation, which I can live with (we simply dance to the music). I think this is a venture issue (original design), being incompatible with the new aluminum impeller (blower assy), causing turbulent air flow. Steven, yes, I use a thin ss strip to gently carefully clean out particulate between hx coil loops, thanks. (I hope you guys are getting a commission from helping others… thanks again for your advice. ps: I installed my boiler also, but don’t tell htp).


Date created: 2013-01-26 Name: Dohnal
Location: milwaukee

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

Review:
"Bob"
Nothing but trouble


Date created: 2013-01-25 Name: Homer
Location: Nevada

Satisfaction Rating:

3 of 5 stars Neutral

Review:
"Some Considerations"
John Berry--Haverhill MA---Yes, Hi Tech is complicated and does need regular attention, look at today's automobiles. Yes, it was an oversight on the part of htp concerning exhaust and intake issues, especially concentric venting. Experience is a wise and harsh teacher. Yes, natural gas varies across the country as to BTUs per cubic foot of gas and purity. This is why you need a combustion analysis done. The proper fix is not duct tape (duct tape is like The Force, it has a light side and a dark side and holds the universe together). The paper gasket has been replaced with a cork gasket with adhesive on one side that sticks to the blower intake. The Honeywell gas valve has a brass vent the dia of a pencil projecting out of the valve toward the rear of the cabinet. On the 80m this vent can touch the back of the cabinet and prevent proper venting to the gas valve (bad). Drill a 3/8" hole in the rear of the cabinet where the vent touches so as to allow air to the gas valve thru the vent's hole. The spark gap need to be 1/4" (see my earlier posts as to why this is so) Too small a gap will cause loud (explosive) ignitions or no ignition with a smell of gas. The Negative Pressure Switch tell the controller that the blower is running and pulling negative pressure (a safety feature). If stuck open you will never get ignition. The rubber diaphragm in the N.P. Switch ages and gets holes in it and leaks, keeping the micro switch in the open position. The hose connecting the Neg. Pressure switch to the blower must not be leaking either. The N.P. Switch has nothing to do with loud retorts. Loud retort is a delayed ignition commensurate with a gas build up in the combustion chamber that finally ignites. (see spark probe gap posts). As to Munchkin parts, Check the net. Parts can be procured cheaper (see KSCDirect.com for example. That's a wrap!


Date created: 2013-01-23 Name: Rich O
Location: mahwah nj

Satisfaction Rating:

5 of 5 stars Very Satisfied

Review:
"Tech support"
First problem is many a installer will over size these boilers(to big for house) f13 or f14 codes are bad diodes in the blower, change out same. f09 code is a number of things why you could be getting this code. I have seen so many installs that you know for a fact that they were not set up with a gas analyzer(no hole in exhaust pipe). Inproper condensate run off in boiler,clogged drain,on rev#0 and rev #1 boilers the gasket in between the gas tube and the main front plate will also cause a f09 and f10 code. Also post purge should be set at100 sec to remove heat at blower wheel. High temp on boiler is no prime/sec piping on unit and or bad circulatory (dirt in impeller)I have done tec support on these units for many a year and have worked on hundreds of these boilers. This will work on the complete line of munchkin and peerless pinnacle line .


Date created: 2013-01-21 Name: J Brown
Location: Menominee, MI

Satisfaction Rating:

3 of 5 stars Neutral

Review:
"Sweet machine, until .... ten years later"
*Homer in Nevada, I request your opinion* I have read most all related comments of this website, and a few of my issues are comparable. A Munchkin 140M was installed and commissioned Feb 2003 (yes, 10 years ago; it is one of the first models). Until recently, only one very minor issue since install; unit would trip due to the infamous 'no-flame' indication. This complete shut-down occurred only about five times throughout the past 10 years. However, about 30% of ignition starts required more than one attempt. About five weeks ago, the plastic impeller failed (blower motor). Receipt of a new motor assembly, I was surprised to see the metal impeller (aluminum instead of plastic), but simply attributed the change an improved design. I understand the issues involving exhaust-reversion, and feel this concept is far from my list of troubles. After the new blower install, many different issues have started. The occasional rumbling, loud combustion vibration during ignition. Never before has this unit experienced this problem. Another complete meticulous cleaning, inspection, and reassembly of the firebox seems to have resolved this issue. (Intake and exhaust lines are clear). The occasional 'French-horn whistle' during periods of low idle, but only at one specific modulation speed. Again, never before, this unit experienced. Fortunately, the problem frequency is not maintained for more than a few seconds during any particular time period. A separate post suggests incorrect alignment of the gas valve venturi against the blower housing could be the cause. This has been checked, and problem remains. Most puzzling, and most likely directly related to the previous issue (of 10-year history): Erratic rectifier current causes frequent unit shut-down due to 'no-flame' indication. A few weeks of trouble-shooting led to the idea of monitoring the rectifier current (via multimeter). At no time (observed) has the ignition actually failed. Each (observed) start attempt, unit pre-purges and ignites normally; however, only seconds later, the control relay closes the gas valve, causing a restart attempt. Four attempts, the unit trips (as it should). During the past few weeks, the rectifier current has been closely monitored, and found to be very inconsistent, often averaging less than 0.7 microamps, leading to the four-attempt shut-down. However, occasionally, it is rock solid between 1 and 5 microamps, respective to flame size, and the unit operates normally (until the low-idle French-horn entertainment begins). Often cleaned, the rectifier probe is only a symptom, and not the problem; however, an occasional swap between the original and a new probe can provide for a solid ignition and operation cycle. Often, the old probe provides smoother operation than the new probe. One of the posts identify the need to change the burner can gasket (4-screws), and also indicates that an unsecure 'burner-assembly' could interfere with the rectifier current. My question: What is the need to remove the burner-assy from the faceplate? All the years of this unit operating normally, the burner-assy has never been disassembled from the faceplate, but has been cleaned and inspected. This unit has been a very sweet machine for a long time, but this 'blower-motor induced bug' has caused it to be very unreliable at a time of most need. I have sent a 'help-request' to HTP (Heat Transfer Products)... but, no reply. Suggestions are most welcome and appreciated.


Date created: 2013-01-09 Name: M Thompson
Location: Vancouver BC

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

Review:
"POS"
Crappy boiler, required lots of repairs and was very unreliable. At the 5 year mark I finally had enough and replaced it.


Date created: 2013-01-08 Name: John Berry
Location: Haverhill MA

Satisfaction Rating:

3 of 5 stars Neutral

Review:
"Hi tech shouldn't mean needs frequent attention"
I have had my Munchkin 80m for 12 years. I am fortunate that when I installed it, the exhaust is 18” from the intake and downwind. The instructions didn’t warn about sucking in some exhaust could shorten the life of your system! It seems more a concern to minimize pressure differential. I was fortunate in that respect, and having opened the burner chamber up for the first time, it didn’t appear to even need cleaning! Maybe I have particularly clean Natural gas! The 2 of the 3 problems I have had, haven’t been mentioned here: 1. The Honeywell gas valve connector is quite loose fitting and would become disconnected. I ran a piece of duct tape around the valve to secure it and had no further problems.2. No flame lockout. I tried reducing the spark gap, which changed it from intermittent to constant, so I increased it and didn’t see the problem again. Could be related to #33. The system would lockout with “air pressure switch stuck open” and it was reported that the unit produced loud retorts. The problem became more frequent, but the air diaphragm switch measured fine. I replaced it since it is easy ($82!!!) No improvement. The boiler would run until the return warmed up and the blower throttled back, then lockout with that error. If the controller is bad, the upgrade is $730!!!!! Lots of profit to spread around on that one! As this forum made it seem commonplace to disassemble the valve / blower / assembly until, I dug in. From hints here, I realized to take the whole thing out as a unit and that the 4 screws connecting the gas valve to the gas pipe are meant to be disconnected for this. Piece of cake! The fan blade (plastic) looks good, there is no swirl plate, but 2 paper caskets between the blower, adapter block and adapter block to channel are blown open at the narrow edge. I used hi temp silicone sealant (red) in place of the gaskets. Without the paper (and maybe with it!) the screws bottom before the blower is snug. You need washers or shorter screws. Quick clean and rinse, reassemble, runs fine. I’m concerned that I still may find that the Honeywell regulator isn’t always shutting off properly, because I can’t explain why the unit would fire off with a bang.I Called the tech line 1/4/2013 but the only suggestion was to see if the fault changes if the air switch input is shorted. I know troubleshooting is step by step, but they should have a good flow chart of all the possible problems. Another clue I gave was “I smell some gas when the unit locks out”. I’m sure that was because the mixture leaking out the gasket breaks was no longer being recirculated, so it drifted to my nose!


Date created: 2013-01-07 Name: John
Location: Los Altos, CA

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

Review:
"Had three small gas explosions"
Installed 11 years ago by licensed contractor. Have had problems every year after first five years. Early problems with pressure switches. On New Years had Ignition Fault. For unknown reasons, had gas build up in chanber and lead to three small independent explosions before found out what was happening and unplugged everything. First explosion blew off the exhaust air duct. Fortunately no fire. Service disassembled boiler and cleaned completely. I keep the Munchkin Boiler Fault led Code posted for ready reference at all times. Working again but scared of another explosion. May have to replace entire system.


Date created: 2013-01-06 Name: Steve
Location: Plainfield NJ

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

Review:
"Too Many Faults - Too much money"
We had our Munchkin professionally installed by a very good plumber (certified Munchkin installer) in August 2008. The unit has had annual cleaning and servicing by the same Basking Ridge nj installer. We have had Faults 9, 10, 11 & 13 periodically causing regular maintenance expenses. This past October we had to have the blower motor replaced - one year after warranty expiration - at a cost equal to 10% of the original purchase and installation price. Then another series of faults. Installer said that he has never needed to replace blower motor and that we were merely unlucky. To me, when there is this pattern of faults and a high cost parts replacement it is not a question of luck, rather, it is a question of installation quality, product quality or some combination. We bought the unit on the basis of its purported efficiency...trust me, whatever value we saved on energy expenses has been eaten up by repair and maintenance expenses...therefore, the efficiency claim must be weighed against likely overall expensive cost. Both the Munchkin and installer have proven equally disappointing.


Date created: 2012-12-27 Name: ronald bennett
Location: montgomeryville pa.

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

Review:
"Beware"
Installed by a registered plumber 13 years ago and have had repair problems every year. (with difficulty getting parts.) december 26th boiler failed again and block was cracked....satisfied? I think not, very bad choice! Beware check out available info, before purchasing.


Date created: 2012-12-15 Name: Chris
Location: Newton, MA

Satisfaction Rating:

5 of 5 stars Very Satisfied

Review:
"Worked Fine"
I've had my boiler for 7 years. Error codes began 2 years now all is fine Here's the code to making these boilers sing... Make sure exhaust is 18" away from intake (acidic air will rot intake fan) Make sure co, co2 are adjusted properly clean combustion chamber 1x/year use a feeler gauge/vac/stiff nylon brush to really clear out carbon coffee-like grains hook a wet vac up to condensate drain then flush with ~10 gallons of water. After doing this the boiler has run like a top!


Date created: 2012-12-09 Name: J Gallegos
Location: Reno, NV

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

Review:
"Maintenance NIGHTMARE"
Almost like clockwork the boiler has problems twice a year costing nearly $500 each time. very poor quality and very poorly designed. This piece of equipment should never have been allowed to be on the market.


Date created: 2012-11-26 Name: Michaela
Location: MN

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

Review:
"DO NOT BUY A MUNCHKIN"
Unless you want repair bills every single year do not buy a Munchkin for your home! The company that installed my Munchkin 1/2007 no longer sells them- what does that tell you?!


Date created: 2012-11-16 Name: Andrew
Location: Prescott, AZ

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

Review:
"Munchkin problems"
We purchased our house in 2007 and was initially impressed with the Munchkin. We've always had problems with the f09 error; I figured out how to take care of that problem. Now it's f10. I live in a small town where there are only a four people who know how to work on it. The first guy came out and did all the maintenance, $250. That night we still had f10 problems. He admitted he didn't know what to do and gave us a name of another business. That guy came out, said he fixed it, and gave me all the history on Munchkins and boilers, $250. Within an hour after he left, f10. I understand that there may be condensation. I have the third business coming out today.


Date created: 2012-10-24 Name: Eric S.
Location: Fort Collins, CO

Satisfaction Rating:

5 of 5 stars Very Satisfied

Review:
"Great system!"
The unit has been great. Maintenance free since it was installed except for cleaning. upgraded it with an outdoor temperature sensor last year. Would put another one in without a hesitation. Would definitely use a different contractor though, American Services in nw Colorado won't get any more of my business!


Date created: 2012-10-16 Name: J. C. Pernicka
Location: Bellvue, Colorado

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

Review:
"Unreliable Junk"
Purchased house 7 years ago and was impressed with the presents of the Munchkin boiler and a very well done installation. So much for looks. The plastic impeller of the blower failed within 2 months the first time and continued to disintegrate (had four replaced with the same type that continued to fail). After the first one failed, redid the vent (although the original installation was done exactly per the manufactures specification) so that under no circumstances could the exhaust feed back into the air intake. Plastic continued to fail. It's always interesting to hear "the problem is the installation" when dealing with a poorly engineered component. Finally, after 4 years of continued problems associated with the design, I called http directly (it also helped when I informed them I run a military failure analysis lab) and they sent me a new blower with a metal impeller which has continued to operate for 2 years without falling apart. However, now we have a sever vibration when the blower clears the boiler just prior to ignition, that is if it starts. We can not leave our home in the winter for any period longer than 24 hours, since we never know when or if the boiler will operate. And, yes, we have had all the service calls recommended (averaging 4 per year) by factor authorized repair companies and have spent about twice the cost of the unit on labor. I would have been money ahead to pitch the unit and replace it with something "more reliable"?


Date created: 2012-10-09 Name: Showerless JOE
Location: Amherst, MA

Satisfaction Rating:

3 of 5 stars Neutral

Review:
"Banging in Boiler"
Finally! - Some people who know these systems....I Bought an 80m in 2007, and have pretty good luck with it so far. I have a 2 zone system with dhw heating as well. Recently, the system has started banging shortly after the dhw cycle starts. My plumber said that the water is "flashing" in the boiler. The temperature shoots up very quickly and the burner modulates down and will eventlally shut off. Now, I'm not a hvac tech, but it seems that this would happen because the boiler is not getting enough water flow. Sure enough, I read on one post about how a bad pump could cause this. My question was I was wondering if anything else would cause it. Are there any tests that will narrow down the problem - thanks!!!


Date created: 2012-01-27 Name: Alan Z.
Location: Anchorage, AK
Years owned: 2

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

Review:
"I'm so lost!"
Purchased our condo 2.5 years ago. The first 1.5 years went great with our Munchkin t80m in place. This past winter we have been receiving f14 (fan runs at 130% for 60 seconds) codes all the time. It's weird, it would happen all the time when the temperature dropped below 5 degrees outside. Otherwise, it'll come and go below about 20 degrees. Our hot water tank and baseboard heating is fed off the machine. I called service on it a few days ago and he just went through the technical guide that I also have that came from the Munchkin website. 1. check the wires. He unplugged then plugged back in the wires to see if all connections were in tact. It was. He then said that I needed a new blower assembly motor because that is what the "guide" said. I asked him if he knew if that was the problem, he said "well, it looks fine but that is what the guide said to do next". Total loss of confidence i called them back the next day (yesterday) to speak with the manager. I conveyed to him that i hated throwing money at something that they didn't even know was broken. I was also quoted the blower motor costs without labor 800$. The Manager called the Munchkin rep in town to discuss with him my issue. The munchkin tech said that he believed that it was control board and not the motor. The manager told me that he will change out the control board for 400$ and that should fix the problem. If it doesn't then he'll take off 400$ of the cost of the blower motor since i already purchased the new control board. Today, new control board and the tech left. After 3 hours later, i got another code. (I also noticed that the temperature on the digital display panel moved a lot slower than before) It was F13 now! (fan runs too slow!!) New control board and now the blower motor doesn't run fast enough?! I wonder if it was even the motor to begin with. And also, when it ignites, it sounds weird. Don't know how to explain it but it just doesn't sound normal. If i know what that even sounds like. I'll call him again tomorrow, the labor work is under warranty. Any additional insight would be greatly appreciated and more than welcomed. Thank you!


Date created: 2012-01-26 Name: Sheila
Location: Milford, PA
Years owned: 2

Satisfaction Rating:

4 of 5 stars Somewhat Satisfied

Review:
"Works fine when OTS works"
I replaced the Outdoor Temperature Sensor (OTS) - again - today. When the OTS works, the system works fine for me. But this is now my third OTS - what's the deal?? I hate waking up to a cold house and checking the d5 to see that the boiler thinks the outdoor temperature is 138 degrees when it's really only about 32 degrees (last year d5 showed 147 degrees, in reality it was only about 15 degrees, had to replace the ots). If Homer is still around, could he please let me know, if I disconnect the outside ots unit entirely and just wrap the outdoor wires with electrical tape, will the unit still work? And if so, what else would I need to do to make this happen? I don't want to have to replace the ots again in the future and if I really don't need it in the first place, then I'd rather not deal with it the next time it malfunctions. Thank you.


Date created: 2012-01-20 Name: Shane kairalla
Location: Durango, co
Years owned: 5

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

Review:
"5 years of hassle"
I have had this unit for 5 years and have had a service guy out many times. 3 times this year. I had to replace the pressure switch recently and today it's doing the same thing (error po) not enough pressure to stay on. I believe now it was never the pressure switch. He has "flushed" I think 5 times now . This fixes the issue but only temporarily. I think at this point I will trash this thing and start over with something better. I'd rather have something less efficient and more durable. PS: originally I had glycol in the radiators and was told switching to water would help -- it did not.


Date created: 2012-01-18 Name: P. Cruse
Location: S E Wisconsin
Years owned: 7

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

Review:
"Fed Up in Wisconsin"
Has not worked properly in the 7 years we have had this unit. At least 3 times per year we are calling for service since we have no hot water. The unit starts to make a loud sound like a motorboat then quits. Several years ago I finally called the rep without notifying my installer and when he came out he told us that something was installed improperly and was causing our problems. Also that this mistake would cause a decrease in longevity of the unit. When our contractor came to fix it he said that was not true. We have since gotten rid of the installer but may just skip the floor heating and buy a regular hot water heater. What a waste of money for this piece of junk.


Date created: 2011-07-12 Name: G STEF
Location: MD
Years owned: 3

Satisfaction Rating:

5 of 5 stars Very Satisfied

Review:
"WORST COMPANY TO EVER DEAL WITH!"
I had this installed and it is terrible. f9 codes all the time. That means no hot water because the pilot light wont light. Do not buy - they're crap.


Date created: 2009-03-18 Name: Stu
Location: Voorhees, NJ

Satisfaction Rating:

3 of 5 stars Neutral

Review:
"HVAC Sales"
As a contractor we have installed over 50-Munchkin boilers. For the most part they are reliable and Heat Transfer Products have honored their warranty. The boiler is sensitive to installation. If you don't follow instructions well you should be installing cast iron. We have had a series of leaking heat exchangers. Currently we are installing #4, a 140M, in the same home. Our customer is loosing confidence in us because of this boiler. We have not seen a lot of the problems listed in various sites concerning the Munchkin. Without looking at the individual boilers I would suspect poor installations, not poor product design. I believe our problem with leaking heat exchangers is poor quality control in manufacturing. My $.02


Date created: 2009-03-07 Name: Rob Stahl
Location: Lansing, MI
Years owned: 4

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

Review:
"SUPERVISOR"
I have had problems with my munchkin 80m every winter always faulting out for different problems since installed, the main board burnt out twice (maybe a power surge i'm not sure) but I decided to try to repair main board myself instead of paying another 600.00 and it worked, now I got blower problems,so I would like to have any non-working blowers if anyone has one to see if its poss. to repair instead or putting any( more) money into this don't buy boiler


Date created: 2009-01-19 Name: Jesse H.
Location: Liberty, Utah
Years owned: 3

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

Review:
"Munchkin Nightmare"
Had a Munchkin 199m installed fall 2005 under new construction...have not made it a single season without multiple service calls...multiple f codes...same response as others, plumber indicates Utah only has one mfg rep. Rep won't stand good for warranty always someone else's fault...not suggest to anyone...


Date created: 2008-10-25 Name: H. Heart
Years owned: 6

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

Review:
"Unreliable"
The Munchkin 199m boiler has presented me with very costly repair expenses since the 3rd year of use. To date, my expenses have amounted to about 20% of the price of the unit 6 years ago (including installation). Many of the specialized internal components are very sensitive and are not made to withstand normal use. Most of the parts that have malfunctioned have been recently redesigned. With exception to the boiler fan (our was replaced under warranty) and the heat exchanger, the parts are not warranted for more than a year. This boiler is very hi-tech and it is very difficult to find knowledgeable or experienced professionals to work on the system. This is my 6th heating season with the unit and it is not working again. I will not be repairing it this time. I will be having a Dunkirk installed next week. I hope I have better luck.


Date created: 2008-08-05 Name: Curtis T.
Location: Orem, UT
Years owned: 2

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

Review:
"Cold showers; cold heart"
I purchased a home with the Munchkin T80M boiler / SuperStor water heater combo 2. 4 years ago. I had to replace the blower(under warrenty) within the first 2 months. It has now failed again, along with the water pressure switch; only after I had to replace a return water pump 2 months ago. After this fiasco, I will be into my "munchkin high efficiency heater" over $1200. I miss my old $180 "inefficient" 50 gallon water heater that kept my water warm and my wife happy


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Other Munchkin R1 (Revision 1) Reviews

Most of the reviews around the web pertaining to the Munchkin R1 revolve around troubleshooting issues. Web forums such as heatinghelp.com and hvac-talk.com reflect a wide array of complications homeowners have had with this unit. Ignition failure, water discharge, blower motor replacement and failing components are among the issues posted.

In addition, contractors on hvac-talk.com note that Munchkin units have had problems in the past with specific components, such as inducers and swirl plates. In order to prevent unexpected repairs or component failure, these contractors advise consumers to ensure their units receive yearly maintenance.

Heat Transfer Products Munchkin R1 (Revision 1) Model Numbers

The Munchkin R1 (Revision 1) is available in different models which vary in efficiency and capacity.

Model Number AFUE BTUs per Hour
140M 92 140000
199M 92 199000
80M 92 80000

Munchkin R1 (Revision 1) Warranty

HTP provides a 3-year warranty for the R1 blower motor and a complete 1-year warranty for any defective parts. Within two to seven years after installation, HTP will replace or repair any part that is defective due to a leaking heat exchanger.

During the eighth through twelfth year of use, HTP will cover only a certain percentage of the cost to repair or replace the defective boiler. The percentage paid varies depending on the age of the unit.

 
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