Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
Peerless Series PBC PBC-34 and Peerless Series PBC PBC-40 are two combination (combi) boilers from the Peerless Boilers Series PBC (Peerless Combi) line. The Peerless Series PBC PBC-34 is rated 15.5–80 MBH input, 76.2 MBH heating capacity and 95.1% AFUE, and the Peerless Series PBC PBC-40 is rated 15.5–100 MBH input, 95.1 MBH heating capacity and 95.2% AFUE. Peerless Series PBC PBC-40 lists 20 MBH more input than Peerless Series PBC PBC-34 (100 MBH against 80 MBH). Peerless Series PBC PBC-40 carries the higher published AFUE at 95.2%, against 95.1%.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Peerless Series PBC PBC-34 | Peerless Series PBC PBC-40 |
|---|---|---|
| Space-heating (CH) input, minimum | 15.5 MBH | 15.5 MBH |
| Space-heating (CH) input, maximum | 80 MBH | 100 MBH |
| Heating capacity | 76.2 MBH | 95.1 MBH |
| Net rating | 64.6 MBH | 80.9 MBH |
| Efficiency (AFUE) | 95.1 % | 95.2 % |
| Turndown ratio | 8.3:1 | 10.0:1 |
| DHW input, minimum | 15.5 MBH | 15.5 MBH |
| DHW input, maximum | 130 MBH | 155 MBH |
| DHW output at 70°F rise | 3.4 GPM | 4 GPM |
| Domestic hot water | Integrated combi boiler: space heating plus on-demand domestic hot water | Integrated combi boiler: space heating plus on-demand domestic hot water |
| Dimensions (A × B × C) | 16-13/16" × 18-3/16" × 30-11/16" | 16-13/16" × 18-3/16" × 30-11/16" |
| Venting | Direct vent, 2" or 3" piping | Direct vent, 2" or 3" piping |
| Control | PBC control with easy-to-follow set-up and service menu | PBC control with easy-to-follow set-up and service menu |
| Fuel | Natural gas or LP gas | Natural gas or LP gas |
Published ratings: the Peerless Series PBC PBC-34 is rated 15.5–80 MBH input, 76.2 MBH heating capacity and 95.1% AFUE; the Peerless Series PBC PBC-40 is rated 15.5–100 MBH input, 95.1 MBH heating capacity and 95.2% AFUE. Peerless Series PBC PBC-40 lists 20 MBH more input than Peerless Series PBC PBC-34 (100 MBH against 80 MBH). Peerless Series PBC PBC-40 carries the higher published AFUE at 95.2%, against 95.1%.
The turndown differs: the Peerless Series PBC PBC-34 lists 8.3:1, while the Peerless Series PBC PBC-40 lists 10.0:1. The domestic-hot-water delivery differs: the Peerless Series PBC PBC-34 lists 3.4 GPM, while the Peerless Series PBC PBC-40 lists 4 GPM.
Both records print the same input (15.5 MBH), domestic-hot-water input (15.5 MBH), domestic-hot-water arrangement (Integrated combi boiler: space heating plus on-demand domestic hot water) and dimensions (16-13/16" × 18-3/16" × 30-11/16"), per the cited sources.
Peerless Boilers
The Peerless Series PBC PBC-34 is the smallest combi in the current combi range: space heating at 15.5–80 MBH input with a DHW side firing 15.5–130 MBH, delivering 3.4 GPM at a 70°F rise at 95.1% AFUE on the wall-hung stainless platform.
Peerless Boilers
The Peerless Series PBC PBC-40 is the 10:1-turndown middle size in the current combi range: space heating at 15.5–100 MBH input with a DHW side firing 15.5–155 MBH, delivering 4 GPM at a 70°F rise at 95.2% AFUE on the wall-hung stainless platform.
The Peerless Series PBC PBC-40 lists 100 MBH, against 80 MBH on the Peerless Series PBC PBC-34, per the cited documentation.
The Peerless Series PBC PBC-40 carries the higher published AFUE at 95.2%, against 95.1%.
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.