Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
The DCC-115 and DCC-150 are the two smaller DCC combis of the discontinued '(While supplies last)' AI line, both at 95% AFUE in the shallow 13-9/16" cabinet at 103 lb. The DCC-150 lifts central heating from 93.5 to 125 MBH maximum input and DHW from 115.5 to 153 MBH (2.5 to 3.5 GPM at a 70 °F rise), with heating capacity rising from 85.4 to 113 MBH.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Dunkirk DCC-115 | Dunkirk DCC-150 |
|---|---|---|
| Central-heating input, minimum | 16.6 MBH | 22 MBH |
| Central-heating input, maximum | 93.5 MBH | 125 MBH |
| DHW input, minimum | 16.6 MBH | 22 MBH |
| DHW input, maximum | 115.5 MBH | 153 MBH |
| DHW flow rate at 70 °F rise | 2.5 gpm | 3.5 gpm |
| AFUE | 95 % | 95 % |
| Heating capacity | 85.4 MBH | 113 MBH |
| Net water rating | 74 MBH | 98 MBH |
| Turndown, heating mode | 5.6:1 | 5.7:1 |
| Turndown, DHW mode | 6.9:1 | 7:1 |
| Dimensions (H x W x D) | 30" x 17-3/4" x 13-9/16" | 30" x 17-3/4" x 13-9/16" |
| Weight | 103 lb | 103 lb |
Both are wall-hung combis of the DCC/DCB AI condensing family at 95% AFUE (per the official sell sheet), sharing the 30" x 17-3/4" cabinet with 13-9/16" depth and a 103 lb weight, 1 gallon water content, 3/4" system supply/return (G straight thread) and 1/2" copper-sweat DHW connections.
The sell sheet prints CH input of 16.6-93.5 MBH on the DCC-115 against 22-125 MBH on the DCC-150, with heating capacity of 85.4 versus 113 MBH and net water ratings of 74 versus 98 MBH. On the DHW side, the DCC-150's 153 MBH maximum (22 minimum) lifts flow from 2.5 to 3.5 GPM at a 70 °F rise.
The DCC-115 fires down to 16.6 MBH in both CH and DHW modes against the DCC-150's 22 MBH floor, which matters for mild-weather modulation; but both models sit on pages that print '(While supplies last)' with zero current documents, so any selection guidance applies to service or parts of already-installed units, not new purchases.
Dunkirk Boilers
The Dunkirk DCC-115 is the 115.5 MBH-class combi of the DCC 'AI' condensing line: 16.6 to 93.5 MBH central-heating input with DHW input to 115.5 MBH (2.5 GPM at a 70 °F rise), 95% AFUE and 85.4 MBH heating capacity. The DCC page prints '(While supplies last)' with no current documents, so this model is discontinued (sell-through).
Dunkirk Boilers
The Dunkirk DCC-150 is the 153 MBH-class combi of the DCC 'AI' condensing line: 22 to 125 MBH central-heating input with DHW input to 153 MBH (3.5 GPM at a 70 °F rise), 95% AFUE and 113 MBH heating capacity. The DCC page prints '(While supplies last)' with no current documents, so this model is discontinued (sell-through).
The official sell sheet prints 3.5 GPM against 2.5 GPM at a 70 °F rise, with DHW input of 153 MBH against 115.5 MBH.
Yes — both are 30" x 17-3/4" with 13-9/16" depth at 103 lb per the sell sheet.
The official DCC page prints '(While supplies last)' with no current documents — the line is in end-of-life sell-through, so availability is limited to remaining stock through dealers.
A consultation includes a heat-loss review so the size is right the first time.
On-site service in Greater Vancouver, BC. ROMA lists “Open 7 days” on its site; call to confirm same-day availability.
Sources and verification
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.