Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
Boilers.ca is a brand of ROMA Heating & Cooling · Licensed gas contractor LGA0202903
Comparison
Verdict in brief
The Peerless Series PBC PBC-40 and Peerless Series PBC PBC-52 are both combination (combi) boilers in the Peerless Boilers Series PBC (Peerless Combi) line. Published ratings: Peerless Series PBC PBC-40 at 15.5–100 MBH input, 95.1 MBH heating capacity and 95.2% AFUE; Peerless Series PBC PBC-52 at 24.5–120 MBH input, 114.6 MBH heating capacity and 95.3% AFUE. Peerless Series PBC PBC-52 lists 20 MBH more input than Peerless Series PBC PBC-40 (120 MBH against 100 MBH). Peerless Series PBC PBC-52 carries the higher published AFUE at 95.3%, against 95.2%.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Peerless Series PBC PBC-40 | Peerless Series PBC PBC-52 |
|---|---|---|
| Space-heating (CH) input, minimum | 15.5 MBH | 24.5 MBH |
| Space-heating (CH) input, maximum | 100 MBH | 120 MBH |
| Heating capacity | 95.1 MBH | 114.6 MBH |
| Net rating | 80.9 MBH | 97.2 MBH |
| Efficiency (AFUE) | 95.2 % | 95.3 % |
| Turndown ratio | 10.0:1 | 8.1:1 |
| DHW input, minimum | 15.5 MBH | 24.5 MBH |
| DHW input, maximum | 155 MBH | 199 MBH |
| DHW output at 70°F rise | 4 GPM | 5.2 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" | 18-13/16" × 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-40 is rated 15.5–100 MBH input, 95.1 MBH heating capacity and 95.2% AFUE; the Peerless Series PBC PBC-52 is rated 24.5–120 MBH input, 114.6 MBH heating capacity and 95.3% AFUE. Peerless Series PBC PBC-52 lists 20 MBH more input than Peerless Series PBC PBC-40 (120 MBH against 100 MBH). Peerless Series PBC PBC-52 carries the higher published AFUE at 95.3%, against 95.2%.
The turndown differs: the Peerless Series PBC PBC-40 lists 10.0:1, while the Peerless Series PBC PBC-52 lists 8.1:1. The domestic-hot-water delivery differs: the Peerless Series PBC PBC-40 lists 4 GPM, while the Peerless Series PBC PBC-52 lists 5.2 GPM. The dimensions differs: the Peerless Series PBC PBC-40 lists 16-13/16" × 18-3/16" × 30-11/16", while the Peerless Series PBC PBC-52 lists 18-13/16" × 18-3/16" × 30-11/16".
Both records print the same domestic-hot-water arrangement (Integrated combi boiler: space heating plus on-demand domestic hot water), venting (Direct vent, 2" or 3" piping), control (PBC control with easy-to-follow set-up and service menu) and fuel (Natural gas or LP gas), per the cited sources.
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.
Peerless Boilers
The Peerless Series PBC PBC-52 is the largest combi at up to 5.2 GPM in the current combi range: space heating at 24.5–120 MBH input with a DHW side firing 24.5–199 MBH, delivering 5.2 GPM at a 70°F rise at 95.3% AFUE on the wall-hung stainless platform.
The Peerless Series PBC PBC-52 lists 120 MBH, against 100 MBH on the Peerless Series PBC PBC-40, per the cited documentation.
The Peerless Series PBC PBC-52 carries the higher published AFUE at 95.3%, against 95.2%.
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.