Dunkirk Boilers · DCC/DCB (AI condensing)
Dunkirk DCB-165
The Dunkirk DCB-165 is the 164 MBH-class central-heating model of the DCB 'AI' condensing line: 29.5 to 164 MBH input at 95% AFUE with 153 MBH heating capacity and a 133 MBH net water rating. The DCB page prints '(While supplies last)' with no current documents, so this model is discontinued (sell-through).
Key figures
- Max input
- 164 MBH
- Max CSA output
- —
- AFUE
- 95 %
- Min input
- 29.5 MBH
Input is gas energy consumed; output is heat delivered. Never size from input alone.
Dunkirk DCB-165 in practice
The DCB-165 is the 164 MBH-class central-heating model of Dunkirk's DCB line — the wall-hung 'AI' condensing platform the official page describes with AI control technology that automatically sets up the boiler during startup, recognizes natural or LP gas without a conversion kit, and continuously monitors combustion. The sell sheet prints 29.5 to 164 MBH central-heating input with 153 MBH heating capacity, a 133 MBH net water rating and 95% AFUE.
It is a wall-hung condensing design at 30" x 17-3/4" (21-1/2" deep) weighing 125 lb on the 316L stainless steel heat exchanger and burner, with System supply/return 1" G (straight thread), gas at 3/4" NPT and 3/4" NPT condensate, plus the LABOR SAVER manifold included (System supply/return with LABOR SAVER manifold 1-1/2" copper sweat).
Status as printed on September 9, 2026: the DCB page prints '(While supplies last)' under the product title with no current documents, so this model is recorded as discontinued (sell-through). The floor-standing DCBF version is documented at the same ratings on its own page. Gas work belongs with a licensed contractor against the archived Rev. A manual (PN 240013687).
Best suited to
- Homes whose heat-loss calculation fits the 164 MBH-class heating-only boiler
- Owners of an installed DCC/DCB unit identifying the model and pulling the archived documentation
Applicability and support
- Model number
- DCB-165
- Canadian availability
- unknown
- Production status
- discontinued
- ROMA supplies
- Confirmed at consultation
- ROMA services
- Confirmed at consultation
- Warranty
- Series terms
Where ROMA provides on-site service
On-site service is currently offered in Greater Vancouver, BC, including Vancouver, Burnaby, Richmond, Surrey, Coquitlam, North Vancouver, West Vancouver, New Westminster, Port Coquitlam, Port Moody, Delta, Langley, Maple Ridge, Abbotsford, Chilliwack, White Rock, Pitt Meadows, Tsawwassen, Anmore, Lions Bay, Belcarra, Bowen Island, Mission. Everything else on this site is reference information you can use anywhere in Canada.
Specifications
Published specifications
Values as published by Dunkirk Boilers. Units are shown with every value; notes flag conflicting sources or missing figures.
| Specification | Value | Note |
|---|---|---|
| Input | ||
| Central-heating input, minimum | 29.5 MBH | CH input minimum in MBH as printed in the official DCC/DCB sell sheet table. |
| Central-heating input, maximum | 164 MBH | CH input maximum in MBH as printed in the official DCC/DCB sell sheet table. |
| Output | ||
| Heating capacity | 153 MBH | Heating capacity in MBH as printed in the official DCC/DCB sell sheet table. |
| Net water rating | 133 MBH | Net water rating in MBH (piping and pickup allowance of 1.15) as printed in the official DCC/DCB sell sheet table. |
| Efficiency | ||
| AFUE | 95 % | 95% AFUE as printed in the official DCC/DCB sell sheet table and on the product page. |
| Venting and air | ||
| Venting | Coaxial polypropylene or 2-pipe polypropylene/CPVC/PVC | Coaxial polypropylene 5"/3" or 2-pipe polypropylene 2" or 3", or 2-pipe CPVC/PVC 3", per the sell sheet (2-pipe requires an adapter sold separately). |
| Physical and connections | ||
| Dimensions (H x W x D) | 30" x 17-3/4" x 21-1/2" | Dimensions per the official sell sheet; the 165/205-class sizes use the 21-1/2" depth. |
| Weight | 125 lb | Per the official DCC/DCB sell sheet (94 lb on the 75/100 sizes, 103 lb on the 115/150 sizes, 104 lb on the 125, 125 lb on the 165/205 sizes). |
| Boiler water content | 1-1/4 gal | Per the official DCC/DCB sell sheet (1 gal on the 75-150 sizes, 1-1/4 gal on the 165/205 sizes). |
| Heat exchanger | 316L stainless steel heat exchanger and burner | As printed on the official DCC product page: DCC-205, DCC-150 and DCC-115 are also equipped with a stainless steel brazed-plate heat exchanger. |
| Electrical | ||
| Power supply | 120 V ac, 60 Hz, 1 phase, less than 21 A | Per the official DCC/DCB sell sheet (15 A circuit recommended). |
| Operating limits and other | ||
| Turndown, heating mode | 5.5:1 | As printed on the official product page for this model. |
| Connections | System supply/return 1" G (straight thread); gas 3/4" NPT; condensate 3/4" NPT | Per the official sell sheet connection table; with the LABOR SAVER manifold, system supply/return step up to System supply/return with LABOR SAVER manifold 1-1/2" copper sweat. |
| Gas type | Natural gas or LP — recognized automatically | The AI control recognizes natural or LP gas during startup; no conversion kit required, as printed on the page. |
Manuals
- DCC/DCB 75-205 Boiler Manuals Rev. A (PN 240013687, MGC-2209-REV-A)MGC-2209-REV-A (Rev. A), PN 240013687 · 2022-09
- DCC/DCB Sell Sheet (240013308 Rev. 10/20/22)240013308 Rev. 10/20/22
Alerts documented for this model
Frequently asked questions
Is the DCB-165 discontinued?
The official page prints '(While supplies last)' with an empty 'Current Documents' tab, which Boilers.ca records as discontinued (sell-through); the Rev. A manual set stays downloadable under 'Archived Documents'.
Is the DCB-165 a combi boiler?
No — DCB codes are central-heating only; Dunkirk's combi versions of this platform carry DCC codes.
Is DCC/DCB the same boiler as Utica's MAC/MAH?
Yes — both ECR International brands sell the same AI wall-hung platform and share the Rev. A boiler manual print PN 240013687 (MGC-2209-REV-A).
Questions about the Dunkirk DCB-165?
Describe what the boiler is doing and get a straight answer about the next step.
On-site service in Greater Vancouver, BC. ROMA lists “Open 7 days” on its site; call to confirm same-day availability.
Sources and verification
- Dunkirk — DCB product page ('(While supplies last)') · accessed September 9, 2026
- DCC/DCB Sell Sheet (240013308 Rev. 10/20/22) · accessed September 9, 2026
- DCC/DCB 75-205 Boiler Manuals Rev. A (PN 240013687) · accessed September 9, 2026
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.