We speak HVAC so you don't have to
CONNECT with us!

our tools and detailed reports
can help you choose the best
furnace, boiler, heat pump or
central air conditioner.

DUNKIRK Quantum 90-100 Boiler

#3 of 3 DUNKIRK Boilers

Updated: Oct 16, 2016

Write a review
Read more about DUNKIRK Boilers

Overview of the Quantum 90-100

Part of the Dunkirk Quantum 90 series, the 90-100 has a 90% AFUE rating for efficiency and a 100,000 BTUh capacity.

Consumer Reviews of the DUNKIRK Quantum 90-100

Compare to Other Dunkirk Boilers:
  • Very Satisfied
  • Somewhat Satisfied
  • Neutral
  • Somewhat Unsatisfied
  • Very Unsatisfied

Date created: 2016-10-16 Name: Dave
Location: Hayward, WI

Satisfaction Rating:

1 of 5 stars

"Second heat exchanger failed"
In 2008 we had a Dunkirk Quantum 90-100 installed. It was said to be a reliable unit, however after only 6 years the heat exchanger failed by a crack in the casting. Dunkirk replaced it with no charge on the component but we still have to pay for installation which was more than $500 in labor. The new casting was said to be coming from a new foundry supplier and the problem was fixed with the new one. It was installed in March 2015 and failed again in March 2016. The problem now is internal and the glycol fluid leaks inside and comes out the condensate drain, faulty again. We wondered where some fluid loss was coming from, it was inside the unit. If you buy a Dunkirk make sure you have a good backup system. It's hard to believe that this can happen and after reading the other reviews it's clear that this system is a joke. Any advantages in a high efficiency unit you will pay dearly for in repairs. Be cautious and look for another solution.

Date created: 2016-01-19 Name: B. Doyle
Location: Cohasset, MA

Satisfaction Rating:

1 of 5 stars

"Cracked block"
I purchased through Sears. Same as other reviews. The boiler was checked by a Sears contractor each year but they never detected the failing block which had several cracks and leaked water. I am now fighting with Sears support.

Date created: 2015-02-16 Name: Lamar
Location: Buffalo, NY

Satisfaction Rating:

1 of 5 stars

"Dunkirk boiler nightmare"
I purchased this boiler in 2012. It worked fine throughout the mild winter we had that year. The following year, and every winter including this one, it seems to just stop working. I've spent tons of money for people to repair it. In fact, they came out 3 times in 2 days and told me they didn't want to deal with it anymore. I am very upset about this purchase and hope no one else makes the same mistake that I did. I've spent too many cold night without heat.

Date created: 2014-08-28 Name: C.Scott
Location: North Rockland, New York

Satisfaction Rating:

1 of 5 stars

"Take notice before you purchase"
I am a home improvement contractor. I work closely with other trades. When it came time to put an addition on my own residence, I sat down with my plumber and with budget and efficiency in mind went with this brand. Its been 9 years now and every season igniter and burner replaced, with a service charge on top of the parts. Now another problem with valves and other parts. Very sarcastic sales rep on the phone saying it's due to plumbing install. Own up to it! It is a inferior product. I go to alot of homes every year and will never recommend this boiler. Read the reviews before you choose!!

Date created: 2012-01-19 Name: Gene Tomaszewski
Location: New Lisbon, WI
Years owned: 6

Satisfaction Rating:

1 of 5 stars

We had our Dunkirk installed when we built our new building. Last year in the middle of January, the heat exchanger started leaking in the back. I called the installer and he said he would do what ever it would take to get it repaired or replaced. Dunkirk was called with this reply, "have the installer pull it out, send it to the distributor and they will send it to Dunkirk for review." They, in their sole judgement will check to see if the pH was correct in the fluid and make a determination if it was a manufacturers defect. If it was, they would replace the unit, send it to the distributor, then to the installer who would put it back in. If it was not defective it was $1700 for the exchanger. Guess what happened. None of the above because going three weeks with out heat would have frozen my bottom. I replaced the boiler with another brand that actually has customer service. Dunkirk is a brand I would avoid at all cost. So much for a ten year warranty. Zero is more like it.

Date created: 2011-06-03 Name: JP
Location: Kamas, Utah
Years owned: 9

Satisfaction Rating:

1 of 5 stars

This unit is not energy or cost efficient. It short cycles constantly because of wind affecting the concentric vent in the Rocky Mountains. The unit has gone through 3 ignitors, two induced draft blowers, which are noisy and vibrate like they are not rotationally balanced, and an air pressure switch. The customer service is awful at Dunkirk and they spend more time defending the product and blaming you for misusing it than trying to solve the problem...and they do not listen to you but rather tell or lecture you on your misdeeds. I was told the air pressure switch has a paper element inside and is subject to condensate or water damaging it and I must have installed the concentric vent improperly. This is pure bs..I disassembled the failed air pressure switch and the diaphragm is made of SILICON RUBBER. I tried to get replacement parts and Dunkirk referred me to their list of dealers and distributors and not a one of the companies I called had ANY parts and they all said they discontinued a relationship with Dunkirk. The rep in Denver gave me the same party line story about the air pressure switch having a paper diaphragm etc etc.....he has obviously never seen the inside of one...he also did not have any parts. Dunkirk refused to sell me the parts and I had to go through one of the authorized 'dealers' who would then only sell it to an hvac contractor. Two hvac contractors came to see the unit and spent most of their time bad mouthing Dunkirk and recommended that I scrap the unit and buy a competing brand. Both refused to work on the unit afterwards. I will not buy another Dunkirk.

Find Local Contractors

1. I need a new:

2. My zip code is:

DUNKIRK Quantum 90-100 Model Numbers

The Quantum 90-100 is available in different models which vary in efficiency and capacity.

Model Number AFUE BTUs per Hour
Q90-100 90 100000
Copyright 2002 - 2016 furnacecompare.com