Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
The Peerless PureFire PF-50 and Peerless PureFire PF-80 are both condensing boilers in the Peerless Boilers PureFire line. The Peerless PureFire PF-50 is documented at 16–50 MBH input, 47 MBH heating capacity and 95% AFUE, while the Peerless PureFire PF-80 is documented at 20–80 MBH input, 75 MBH heating capacity and 95% AFUE. Peerless PureFire PF-80 lists 30 MBH more input than Peerless PureFire PF-50 (80 MBH against 50 MBH). Both list the same published AFUE of 95%. Both list the same published shipping weight of 88 lb.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Peerless PureFire PF-50 | Peerless PureFire PF-80 |
|---|---|---|
| Input, minimum | 16 MBH | 20 MBH |
| Input, maximum | 50 MBH | 80 MBH |
| Heating capacity | 47 MBH | 75 MBH |
| Net water rating | 41 MBH | 65 MBH |
| Efficiency (AFUE) | 95 % | 95 % |
| Domestic hot water | Heating-only boiler — domestic hot water comes from a separate indirect tank or water heater | Heating-only boiler — domestic hot water comes from a separate indirect tank or water heater |
| Approx. shipping weight | 88 lb | 88 lb |
| Dimensions (A × B × C) | 13-3/4" × 17-3/16" × 29-1/2" | 13-3/4" × 17-3/16" × 29-1/2" |
| Exhaust vent / air intake | 3" | 3" |
| Approved vent materials | PVC, CPVC, AL29-4C stainless or polypropylene (Category IV, positive pressure) | PVC, CPVC, AL29-4C stainless or polypropylene (Category IV, positive pressure) |
| Supply/return connections | 1" NPT | 1" NPT |
| Gas connection | 1/2" NPT | 1/2" NPT |
| Electrical | 120 VAC, 60 Hz; max total service current to boiler 3.15 A | 120 VAC, 60 Hz; max total service current to boiler 3.15 A |
| Control | PureFire control with plain-English LCD display | PureFire control with plain-English LCD display |
| Fuel | Natural gas or LP gas | Natural gas or LP gas |
Published ratings: the Peerless PureFire PF-50 is rated 16–50 MBH input, 47 MBH heating capacity and 95% AFUE; the Peerless PureFire PF-80 is rated 20–80 MBH input, 75 MBH heating capacity and 95% AFUE. Peerless PureFire PF-80 lists 30 MBH more input than Peerless PureFire PF-50 (80 MBH against 50 MBH). Both list the same published AFUE of 95%.
Both records print the same AFUE (95%), domestic-hot-water arrangement (Heating-only boiler — domestic hot water comes from a separate indirect tank or water heater), shipping weight (88 lb) and dimensions (13-3/4" × 17-3/16" × 29-1/2"), per the cited sources.
Peerless Boilers
The Peerless PureFire PF-50 fires 16 to 50 MBH input with 47 MBH heating capacity and a 41 MBH net water rating at 95% AFUE — the smallest PureFire size and the entry point for the stainless condensing line — on the stainless-steel, sealed-combustion direct-vent condensing platform.
Peerless Boilers
The Peerless PureFire PF-80 fires 20 to 80 MBH input with 75 MBH heating capacity and a 65 MBH net water rating at 95% AFUE — a mid-small size sharing the compact cabinet of the PF-50 — on the stainless-steel, sealed-combustion direct-vent condensing platform.
The Peerless PureFire PF-80 lists 80 MBH, against 50 MBH on the Peerless PureFire PF-50, per the cited documentation.
Both list the same AFUE of 95%.
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.