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DUNKIRK Quantum 90 Boiler

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Overview of the Quantum 90

The Dunkirk Quantum 90 boiler is a currently produced unit that comes in two series: the Q-90-100 and Q-90-200 series. These boilers are gas-fired, either natural gas or propane. The Q-90 boilers achieve a 90-percent AFUE rating. The Q-90 series are condensing boilers, and feature a cast-aluminum heat exchanger. The units are designed with sealed combustion and direct-venting, drawing air from the outside instead of from inside the residence. Each series offers various capacity hot water boilers, and all are Energy Star-rated.

Consumer Reviews of the DUNKIRK Quantum 90

Compare to Other Dunkirk Boilers:
#1  of 3 Dunkirk Boilers
2 of 5 stars 8 reviews

  • Very Satisfied
  • Somewhat Satisfied
  • Neutral
  • Somewhat Unsatisfied
  • Very Unsatisfied

Date created: 2014-05-22 Name: Mark Dupont
Location: Hornell, New York

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

"Dangerous Boilers"
I am a hvac Contractor and have stopped putting in Dunkirk Boilers.. The leaks on the series are a constant. On recent boiler the leak was over the transformer and it caught fire.... Do not put in this boiler...contact the Public Safety Commission with any problems encountered.. There is an on going investigation.

Date created: 2014-01-08 Name: james m slack
Location: sheffield pa. 16347

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

"Quantum 90"
I have had this less than 2 years,and I have had it repaired 2 time. Just had the heat exchanger replaced, and the thing just does not put out any heat. It's only 65 in the house!

Date created: 2012-03-04 Name: w
Location: westfield. nj
Years owned: 12

Satisfaction Rating:

5 of 5 stars Very Satisfied

"good boiler"
I was an early purchaser of this lennox quantum 90 hot water heating boiler. I get better than 90% eff.with the cast aluminum heat exchanger. I replaced the ignitor once (the company recommended a more robust ignitor). The 5/8 in transparent vinyl water condensate drain tubing plugged once last week and when water reached the ignitor the boiler wouldn't start. The drain tubing needs to be checked/cleaned yearly. I have never had to do other than the above service in 12 years. Its a good boiler.

Date created: 2012-03-03 Name: Mike Toran
Location: Philadelphia, PA.
Years owned: 25

Satisfaction Rating:

5 of 5 stars Very Satisfied

"90% - 95% condensing boilers"
I am a hvac contractor in Philadelphia that has 25 years of experience. Most of the complaints that I get from heating system failures are from poorly installed or abused equipment. If the installation and maintenance instructions are followed, then it is highly unlikely that a problem will occur. The condensing furnaces and boilers like all equipment have certain requirements that if not followed can lead to unreliable operation. For example, the pvc pipe vent size, and pitch back to boiler is important to drain condensate properly: the dielectric fittings are needed to prevent a catalytic affect and deterioration of boiler fittings: the improper set-up of a boiler can cause misfiring of the burner and cause sooting of any boiler or furnace. There are 50 ways to kill a boiler or furnace if not following recommended installation requirements. I know that most products are reliable, however when installed improperly they can fail regardless of brand.

Date created: 2011-10-31 Name: Rick
Location: Chicago, IL
Years owned: 6

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

"Money Pit Boiler"
We installed this Q90-200 unit in our 4 unit building. We were suppose to save money on gas but to date we've spent more money on repairs than we did on the unit! If you do purchase this unit see if you can get a bulk deal on igniters because you'll need them. We replace at least once a year and as many as three times. Computer board, pressure switch, blower motor just recently 10/28/11 all replaced with the later at a cost of $968. Even after the new blower motor this piece of junk still locks out. The poor installer is sick of my complaining and his frustration intensifies with Dunkirk because they will not stand behind their product. He tells me not to feel bad because everyone else that he installed this unit for is having the same problem. That made me feel so much better! It actually appears to be a cash cow for him! Do yourself a favor and stay away from this company!! Anybody interested in a class action law suit?

Date created: 2011-02-18 Name: Charles
Location: MI

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

"Dunkirk Sucks! $25,000 Flood Insurance Claim due to this CRAPPY UNRELIABLE BOILER -DUNKIRK QUANTUM 90 ~~~~~"
This marks the fifth time this winter without heat / hot water. This is a common occurance at my house since we installed the Dunkirk Quantum 90. I am so sick and tired and even called the company to complain. I was told by the local distributor that they currently have close to a warehouse full of heat exchangers from these specific boilers b/c they are failing left and right. When I called Dunkirk they acted like they did not know what I was talking about, they acknowledged problems with their 1990 model year but said everything else is solid. Yeah, I can see that from all of the other reviews on this site (insert sarcasm here). My service company won't even sell this brand anymore just because of the problems he's witnessed with mine. Two years ago when the thing failed on a miserably cold day, I had a pipe break which flooded all 3 floors of my house and resulted in a $25,000 insurance claim. Do not buy this boiler, it's worth more as scrap metal than it is as a reliable heating device for your home.

Date created: 2011-01-08 Name: Lyman Etzler

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

" 2.5 Year Old Boiler has Carbon Monoxide Leak after"
Quantum 90 was purchased April 28, 2008. I have had all the same problems as above. Now, after 3 years, it has a carbon monoxide leak, December 28 2010. Was told parts would be shipped overnight. They never arrived. Sears the installer then stated they would arrive January 31, 2011. After complaining to different people the seals were to be delivered January 7, 2011 and a service person would install the new seals. The new seals did not arrive January 7, 2011

Date created: 2010-05-09 Name: Bo Demczar
Years owned: 1

Satisfaction Rating:

1 of 5 stars Very Unsatisfied

"Dunkirk Quantum 90 Boiler"
Brand new built home. Had 3 Dunkirk Quantum 90 Boilers fail in 3 years. The first unit failed when it was discovered that my boiler pressure kept dropping to 0 psi causing the unit to shut off. It was later discovered that Glycol was being removed through the heat exchanger and out through the evaporator pump. The break down of the heat exchanger caused the piping in the attic to get clogged up. I received a second brand new unit and less than 1 year, the same problems occurred. The manufacturer shipped a new q90 boiler built in 2009, had it installed in May 2009 and this too, failed a day after Christmas with Glycol leaking all over the basement. Did not have heat or hot water for several days. It turns out that the boiler heating block developed a hair line crack causing the unit to fail and the Glycol to leak out. ECR International along with their insurance company are holding things up.

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Other Quantum 90 Reviews

A thread on the forum heatinghelp.com reveals a homeowner having problems with his Dunkirk Q-90 boiler turning off for no reason. One contractor defends the brand, and a Dunkirk representative even responds to the complaint. The homeowner concludes by saying that his HVAC company no longer installs the Dunkirk brand due to several problems. The original poster on the forum actually writes for several years about how the Q-90 boiler shuts off at random. The experts conclude that a professional should be consulted.

Hvac-talk.com contains a post comparing a Carrier boiler and a Weil-McLean boiler. An expert on the forum explains that the Carrier boiler is actually the Dunkirk Q-90. The contractors on the forum say that the Carrier may not be worth the extra cost as compared to the Weil-McLean, although the Carrier is more efficient.

A homeowner asks on gardenweb.com about the cost of a high-efficiency boiler such as the Dunkirk Q-90 versus a lower-efficiency boiler that costs thousands less. An expert responds that the higher-efficiency boilers save money in operation, so selection should depend on how long the homeowner plans to stay in the home.

DUNKIRK Quantum 90 Model Numbers

The Quantum 90 is available in different models which vary in efficiency and capacity.

Model Number AFUE BTUs per Hour
Q90-100 90 100000
Q90-200 89.6 200000
Q90-50 90 50000
Q90-75 90 75000

Quantum 90 Warranty

Dunkirk offers a limited warranty for all parts in the Q-90 boiler for the first year. A limited warranty for the heat exchanger only is provided for years two through ten. The heat exchanger continues to be covered in a pro-rated fashion through year 15. The company does not require warranty registration, although it is recommended.

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