Hawken Energy GX Wood Furnace
Updated: Feb 14, 2019Write a review
Read more about Hawken Energy Wood Furnaces
Overview of the GX
The Hawken Energy GX is a high efficiency, low emission outdoor hydronic wood furnace. The GX has a water capacity ranging from 107 gallons to 351 gallons and a heat capacity ranging from 144,000 maximum BTU to 248,000 maximum BTU. The GX uses Afterburner technology, a secondary burn chamber which allows the furnace to use 40% less wood and reduces emissions by over 90% compared to traditional furnaces, according to the manufacturer. Its large cast iron door is insulated for maximum efficiency and designed for easy loading. Units come in a standard green color but select models are available in a variety of colors, including camo. The 2015 starting price of the GX furnace is $6,489 plus shipping and installation. Financing is available.
Date created: 2019-02-14
Name: Bill Schirmer
"Not so Happy"
I would recommend a Hawken Furness to everyone. After heating a house with two fireplaces and carrying wood all day, then listening to my wife complain about the mess all night. The Hawken outdoor Furnace is Heaven sent. Now let's talk about the water lines ran through a 4-inch tile. No way!!! I had a problem the second year with ground water getting into the tile. Running the water lines through tile is like playing Russian Roulette with a loaded gun. My son used a foam insulated tile that works incredibly. Don't use their water line !!!!!
Date created: 2019-01-14
Name: G Bobb
Location: Sweet Valley, PA
Nothing but problems with no solutions or satisfaction. Stove only 6 years old replaced the door twice the second one had to pay out of pocket ($500). Leaks terrible was told wood was too wet, our wood is dried for 2 to 3 years before using. Now leaking water has to add water every 3 or 4 days. No callback or satisfaction from the company and that 20 year guarantee is out the window. Buyer beware this is a horrible company and the steel is sub-par at best rots out go elsewhere.
Date created: 2018-04-24
Name: D. Vincent
Location: Exeter, ME
"My GX10 findings"
I giggled when I read all of the reviews, as I have had all of the same problems and all of the same successes. I bought mine in 2013 and didn't use it until the 14/15 heating season. I have never heated with wood until I bought my house in Maine, the first season was a nightmare, all of the same problems listed in the other reviews with the Hawken customer service being zero, which was tough for this novice burner. But necessity being the mother of invention. We built our own cleaning tools. Learned to clean it once a week. Learned green wood is the arch enemy of the GX10, although in our defense those that sell wood are often dishonest. But when we do have a major, and I do mean major creosote issue, we burn only pallet wood for a few days, that gives it a chance to dry out some and then we are able to get through the tubes, we have also created a tool that will get through that nasty stuff. We also tilted it one inch with the front being up higher by that inch. All of this helped us have a couple of really really good burn seasons, heating our 3500 ft square house comfortably, we also have insulated the attic to r60 and 25% of our walls to R21,(still working on the rest). We also learned to cut and season our own wood, Ha, until this year, I wanted to spend more time on the house, so I opted to buy cut split dry wood, till the end of this season, where they sent me green wood, and we are back to the same old problems. Needing to break out the old tools. The GX10 works great under optimum conditions, anything else causes big problems. Never again will I chance getting green wood. But pallets have been our cure all when we do get into trouble. I hope this helps someone.
Date created: 2017-12-28
Name: D Smith
Location: Emmett, MI
We've had this boiler for about 3 yrs. Now and the virtical tubes are plugged with creosote and won't burn. I wish I would have gone with portage and main boiler.
Date created: 2017-03-22
Name: D. BROWN
Location: Waldoboro, ME
"IT WORKS BUT YOU HAVE TO UNDERSTAND HOW IT WORKS"
It took me two years to get the bugs out of my Hawkin gx 10 but most of the problems I caused. Don't run the boiler when the solenoid is broken. I did what a mess. When cleaning the heat exchanger I use a vacuum cleaner and the drill brush at the same time. The 3/8th electric drill works very. When cleaning the heat tubes place the vacuum rigid pipe into a heat exchange pipe and with the vacuum on push the drill brush into pipe (turn on drill once in pipe) and then push it down as far as you can get it. The vacuum will sucked up all the ash. Reverse the location of the vacuum pipe and the drill brush on the heat exchanger pipe and do it again. There that pipe is clean, now do the same for the rest of them. I also clean the vertical pipes with the drill brush. Start by cleaning the tube furthest from you ( if the boiler is hot you don't want to reach over hot gasses.) Once the brush is spinning push it all the way down until it spins easily pull it out with it still spinning. Be careful when using the drill brush, it is a two handed device - one hand on the drill and other directing the nylon extrusion so it won't loop and snap. It can because I've done it. Clean the ashes/soot out underneath. I won't say to leave to catalyst disk out but it seems to get plugged up a lot. Put the boiler back together and start it up. Make sure the circular pump is piped to a lower outlet and it is pumping towards the house. (My plumber did that) Also if it blows steam out the water fill pipe you have a circular pump problem. I admit I have had more insolation blow in to overhead crawl space, it really help a lot. I only clean my boiler out about 3 or 4 times a season. If you smoke coming out of the door openings when they're closed it's time to clean the boiler. And the last thing I learned was to clean the ashes out every day. You kind of have to remember things wear out, burn out or just stop working for no reason. I bought mine in 2011 and had it running that winter. It is now 2017 it has paid for it's self. Make sure you us a respirator, leather gloves and something cover your eyes.
Date created: 2016-11-02
Name: Larry Simonsen
Location: Hessel, MI
The roof of our furnace has holes in it. It is only 5 years old and we have been trying to get Hawken Energy to even call us back and they won't. It is our only source of heat and we are in our 70's . The furnace works all right but you get no service, and the door is cracked.
Date created: 2016-04-13
Name: Brian S.
Location: Mill Creek, PA
"Horrible sales process"
I've been trying to buy a Hawken for over 3 months now. My local municipality wants to see the Hawken Installation Guide they reference in the owner's manual. Multiple calls and emails have netted Hawken just sending me the same owner's manual over and over. Customer service fail. This is before the sale, how responsive will Hawken be after they have my money? Regardless of how great the product may be, support is critical with such a purchase and Hawken is not very friendly in this regard.
Date created: 2015-12-07
Location: Kokomo, IN
One of the best stoves I've ever had. I'm almost 45 and have been heating with wood since I was 8 or 9. Would very much recommend this stove to anyone!
Date created: 2015-11-30
Name: T. Williams
Location: Gary, IN
"Greatest investment I ever made"
Bought a Hawken Furnace two years ago, saved thousands my first year using it. I love my GX10 furnace. The only part that I've had problems with is cleaning on a constant basis, but it is worth it in the end.
Date created: 2015-11-14
Name: P. Quinn
Location: Whitehall, MI
"Best investment ever!"
My Hawken Energy GX10 outdoor wood furnace was the best investment I have ever made. It requires a little more maintenance than a traditional wood boiler, but totally worth it because it burns so much less wood. I love having a warm home and having heating bills that are almost zero. I don't know why every home in America doesn't have one of these...probably just a matter of time until the word gets out.
Date created: 2015-04-21
Name: M P FALK
Location: Rome, NY
"GX10 the nightmare continues"
I was sold this unit in June of 2012. It was intended to heat my 1950 square foot home; heat, domestic hot water, our 30,000 gallon in-ground pool, and a 12x30 tack room in the horse barn. The Hawken dealer said it was perfect for the job. Since this firm had performed two large hvac projects at our business I never thought to question them. The unit was never able to meet the demand, simplu not enough BYU'S. Nearly three years later we are finally getting our day in court. Neither the dealer nor Hawken would simply admit that I was sold the wrong product for the job intended. Going for triple damages since they have been so difficult; I will let you know in 2 weeks how it pans out.
Date created: 2015-03-18
Name: D. Smith
Location: Emmett, MI
I installed the gx10 in April of 2013. I fired it up in late May to heat my hot water. It works very well and we never run out of hot water. This is our first winter heating our 1600 square foot home and 1600 square foot basement. We had the heat set at 75 and it was never cold. The only thing you need to do is clean the wood burner every week. It does get a lot of dust in the tubs. If you keep it clean it will heat your water fast. Ours turns on at 170 and off at 180. Only need to load wood in the morning and it's good to the next morning. I've only used about 6 face cords to do all of this for about 10 months. I've used zero gallons of propane for heat or hot water.
Date created: 2015-03-01
Name: A. Carter
I am on my 4th year with a gx10 in central Indiana. The first year was dismal; burned too much wood, smoking badly, no heat. I found out that I was not cleaning the unit often enough. Once a month or every other month is way too long to go with a gx10. At the end of the first year, most of the tubes were clogged and it took a representative from Hawken and I approximately 6 hours to clean out the unit. He was here on a free upgrade to my unit. Since then, I have cleaned it out every 2-3 weeks during the heating season and have had no problems. You must burn only dry wood in the gx10 and must keep it clean. I now have a regular kit put together and the cleaning process is down to about 30 minutes. I am heating 4200 square feet of log home and saving about $1000 a year on heating costs.
Date created: 2014-11-03
Name: kevin nichols
I purchased my Hawken gx10 in March. I didn't receive it until August. The dealer sent a guy to hook it up and all the fittings leaked. He said he doesn't believe in plumber's tape. Upon first starting it up, the sensor was bad and indicated a low water level. That was replaced. I have run the stove for a month now and gone through an entire cord of wood, and the outside temperature hasn't hit below 40 degrees. I found out that a firebrick in the back had shifted, causing fire to melt the insulation and gasket in the back of the burn box, which then melted my circulator pump and electrical wires in the back of the unit. I have a brush stuck in the gas chambers. My house will not heat above 70 degrees (keep in mind it's still 40 degrees outside) and I can not go longer than 8 hours on a full stove. I hate this unit.
Date created: 2014-09-17
Name: Ron England
Location: Moscow, PA
"Buy something else, anything else, from anybody but Hawken"
This unit started out great and within a month turned horribly bad. First, it is prone - and I mean seriously prone - to getting clogged with creosote. The heat exchanging tubes are small in diameter, which allows for the creosote to build up quickly. Cleaning with the provided tools is next to impossible. Second, the customer service is just about non- existent. I called many times, looking for direction on why it wasn't working, and would get a short answer, usually amounting to gee, we've never heard that (even though there are a lot of reviews saying the same thing). At one point they sent me new bricks to expand the air opening, but with no directions on how to actually replace them. All in all, find something else. UPDATE - 1/23/15: The folks there, Warren especially, are nice enough, but that doesn't help heat the house. He read my earlier review and had someone from his company reach out to me to discuss my troubles with the unit. I spent some time describing my creosote issues with him, and of course I received the obligatory "we want you to be satisfied" conversation. They sent me some aluminum strips to help clean out the vertical tubes, after a short "back ordered" period, along with a new 1.5 inch brush. I'll say this, when the unit is clean it works well, but you would either have to 1) only burn kiln dried wood (the wood I am burning is over 2 yrs old and has been covered the whole time but still not "seasoned" enough since I still have horrible creosote problems) 2) clean it bi-weekly which is fairly time consuming; I clean it once every two weeks and it's always very full of tar-like creosote, or 3) burn way more tsp with it than I am, I guess. My temperaturess stay above 170 until it gets really cold, then it will start to fall into the mid 160's, more demand. I still have my oil furnace on and it kicks on to help meet the heating/hotwater demand, so I'm not using the GX10 exclusively. All of the things they have told me are or could be the causes, don't seem to be the case. After getting it really clean about 2 months ago, I sent them an email saying I needed my brush replaced. I didn't expect it to be for free, but I got an email back saying it would be sent right away. Two months later, and I sent another email and got an email reply back that I should have received it. Overall, the work behind keeping it clean really doesn't seem to be worth it for me. When I think of what I paid to purchase and install it, I really wish I would have found something else. There is one solution to this and frankly the only thing that would make me a satisfied customer (and if this happened I would publish another review saying so) and that is if Hawken Energy had one of their folks come out and clean and service my unit and show me exactly what I'm doing wrong. I have followed their suggestions and instructions and still I am having problems, and I know I'm not the only one. I would just like Hawken to stand by their product in deed, not just in word.
Date created: 2014-05-28
I would not recommend this stove to anyone and I feel bad for the dealers stuck with them. I suffered through one full season with nothing but problems. The design they use requires you to clean out the heat exchanger holes except after a month or two you'll start to snap the brushes they provide inside the tube. To their credit they sent someone out to upgrade the stove but that only provided short term relief. The design is poor. I bought my stove in 2013. Unless they completely overhauled the design, don't buy it. They ended up replacing the entire stove under warranty but after seeing that it was the same design I sold out back to the dealer for a 15 % restocking fee. All in all I lost $2k and about 30 manhours of "routine" maintenence but was so relieved to get out from under it!
Date created: 2014-02-14
Name: Bob S
Location: Bowie MD
"Don't Buy a HAWKEN"
The furnace will not heat our house and Hawken says that we should add insulation to our house. Unreliable company that doesn't stand up to their guaranty.
Date created: 2013-12-04
Name: t davis
Location: South Otselic,New York
"Gx10 outdoor wood-burning stove"
We paid over $12,000 for this stove last year. First of all we cannot get the stove over 69 degrees unless it is over 30 degrees outside. We started the stove late this fall and a few weeks ago I looked outside and saw steam pouring out the top of the woodstove and the thermostat completely out. After many nesting emails back and forth to Hawken Energy in which they pretty much blamed the problem on everything but their stove-they sent me a new thermostat-I replaced it and it worked for about 3 weeks and today-same problem. This is only the 2nd woodburning season. We called the salesman who told us he was out of business because hawkens did not back up repairs of the many faulty stoves they sold to upstate new Yorkers-their own salesman told me these stoves were "junk". I can't really afford to replace this stove right now so we are dealing with harassing hawken energy to "fix" our outdoor woodburner which is less than 2 years old. I strongly urge anyone to not buy these stoves and I strongly encourage anyone and everyone who bought these stoves and is having problems to get together for a class action lawsuit. I will be contacting the attorney general with this issue at the very least.
Date created: 2012-04-24
Location: North Alabama
"Hawken outdoor furnace delivers excellent heat and economy"
For three winters now I have relied on the Hawken Energy Outdoor wood burning furnace. Not only have I been pleasantly surprised with the actual heat output, I have been even more pleased with the economical aspects of the furnace. Easily maintained, cheap to operate and very reliable, I have no real need for any other type of furnace. Originally intended to be an emergency/ alternative heating source, I have found the unit so reliable and easily maintained that it is now my central and sole source of heat. I highly recommend anyone give these units a try, and would certainly buy another.
Other GX Reviews
There are very few online comments regarding the GX. A consumer on arboristsite.com asked for information about the GX and almost everyone who responded stated that they didn't know much about the unit.
The warranty for the Hawken Energy GX wood furnace is comprised of the following:
- 20-year warranty on parts
- 20-year firebox guarantee against corrosion, pro-rated after the 5th year
- 1-year warranty on electrical components