Dunkirk Q95M
Model Number: 80-200 MBH
Q95M is Dunkirk's gas condensing boiler with a cast-aluminum heat exchanger.
Technical Specifications
Source: manufacturer spec sheet · checked Sep 27, 2026
Prices depend on sizing, venting and piping in your home, so we quote every installation.
Sizing: the right size comes from a room-by-room heat-loss calculation, not the size of the old boiler or a rule of thumb. Oversized boilers short-cycle and waste fuel; steam systems are sized to the connected radiation instead. See how we approach boiler installation.
Home-Specific Operating Cost Review
No guaranteed annual savings or payback period
Historical Use
Fuel consumption and weather
Current Rates
Utility and delivered-fuel prices
System Design
Load, piping, controls, and temperatures
Full Specifications
- Model Number
- 80-200 MBH
- Efficiency (AFUE)
- 95%
- Boiler Type
- Condensing Boiler
- Fuel
- natural gas/propane
- Venting
- direct vent
- BTU Input Range
- 80k - 200k BTU
- Domestic Hot Water
- indirect-ready
- In Production
- Yes
- Heat Exchanger Warranty
- 15-yr limited
Specifications sourced from the manufacturer spec sheet, checked Sep 27, 2026.
Ideal For
Gas homes moving to condensing hydronic heat with an indirect tank
Expert Review: Dunkirk Q95M
Q95M is Dunkirk's gas condensing boiler with a cast-aluminum monoblock heat exchanger, rated for natural gas or propane at 80–200 MBH input.
Dunkirk's literature lists efficiency of up to 95% AFUE, although some revisions show 92.5% for certain sizes, so confirm the rating for the exact size quoted. It is direct vented, supports domestic hot-water priority for an indirect tank and carries a 15-year limited heat exchanger warranty.
Cast-aluminum exchangers are sensitive to water chemistry, so the installer should fill and treat the system to the manual. Size from a room-by-room heat-loss calculation and plan the condensate drain and vent run before ordering.
Key Features & Technology
Dunkirk literature lists 80–200 MBH input for natural gas or propane.
The heat exchanger is a cast-aluminum monoblock, not stainless steel.
Efficiency is listed at up to 95% AFUE; some document revisions show 92.5% for certain sizes, so confirm the exact size.
Direct-vent sealed combustion.
Supports domestic hot-water priority for an indirect tank.
Heat exchanger coverage is a 15-year limited warranty.
Advantages
- Condensing efficiency when return water is cool enough.
- Covers typical single-family loads from 80 to 200 MBH input.
- Can prioritize an indirect water heater.
Considerations
- Cast-aluminum exchangers need water chemistry kept within the manufacturer's limits.
- AFUE differs between document revisions; confirm the rating for the exact size.
- Parts warranty term was not stated in the document reviewed; request the certificate.
- Needs a condensate drain and approved vent materials.
Sizing & Installation Notes
Condensing boilers like the Q95M reach their rated efficiency only when return water runs cool enough to condense flue gases. We check your radiation and design water temperatures so the unit actually condenses in your home, not just on the spec sheet.
Every Dunkirk installation starts with a free in-home assessment covering the heat-loss calculation, venting and chimney condition, and gas or oil supply sizing. Learn more about our boiler installation process, or see current rebate and incentive programs that may apply.
Warranty & Protection
Parts Warranty
See spec sheet
Heat Exchanger
15-yr limited
Our Guarantee
100% Satisfaction
All Dunkirk boiler installations by Home+ Air & Heat include our 1-year workmanship warranty, covering labor and any installation-related issues.
Compare the Dunkirk Lineup
| Model | Efficiency | BTU Range | Fuel | Heat Exchanger Warranty |
|---|---|---|---|---|
| Q95M (this model) | 95% AFUE | 80k - 200k BTU | natural gas/propane | 15-yr limited |
| DXL | 83.5% AFUE | Various sizes available | natural gas | — |
| WPSB Series 4 | 84.1% AFUE | 75k - 299k BTU | natural gas | 20-yr non-prorated |
| XEB Series 4 | 84.4% AFUE | 43k - 188k BTU | natural gas | 20-yr non-prorated |
| Royal HE | 95.2% AFUE | 80k - 200k BTU | natural gas/propane | 10 years |
| DXL-K | 84% AFUE | 59k - 235k BTU | natural gas | 20-yr non-prorated |
| Royal CO (combi) | 95.2% AFUE | 80k - 200k BTU | natural gas/propane | 10 years |
| PSB | 82.7% AFUE | 75k - 299k BTU | natural gas | 12-yr limited |
See the full Dunkirk brand page for lineup context, or browse the Best Condensing Boilers guide to compare across brands.
Frequently Asked Questions
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