Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
The Laars Pennant PNCH 500 and Laars Pennant PNCH 750 are both non-condensing boilers in the Laars Heating Systems Pennant line. The Laars Pennant PNCH 500 is rated 500,000 BTU/hr input, 425,000 BTU/hr output and 85% thermal efficiency, and the Laars Pennant PNCH 750 is rated 750,000 BTU/hr input, 638,000 BTU/hr output and 85% thermal efficiency. Laars Pennant PNCH 750 lists 250,000 BTU/hr more input than Laars Pennant PNCH 500 (750,000 BTU/hr against 500,000 BTU/hr). Both list the same published thermal efficiency of 85%. Laars Pennant PNCH 750 lists 95 lb more shipping weight than Laars Pennant PNCH 500 (735 lb against 640 lb).
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Laars Pennant PNCH 500 | Laars Pennant PNCH 750 |
|---|---|---|
| Input | 500,000 BTU/hr | 750,000 BTU/hr |
| Output | 425,000 BTU/hr | 638,000 BTU/hr |
| Efficiency (thermal) | 85 % | 85 % |
| Shipping weight | 640 lb | 735 lb |
| Water connection | 2" | 2" |
| Gas connection | 1-1/4" | 1-1/4" |
| Firing | Staged, up to 4:1 | Staged, up to 4:1 |
| Venting | Category I or III fan-assisted | Category I or III fan-assisted |
Published ratings: the Laars Pennant PNCH 500 is rated 500,000 BTU/hr input, 425,000 BTU/hr output and 85% thermal efficiency; the Laars Pennant PNCH 750 is rated 750,000 BTU/hr input, 638,000 BTU/hr output and 85% thermal efficiency. Laars Pennant PNCH 750 lists 250,000 BTU/hr more input than Laars Pennant PNCH 500 (750,000 BTU/hr against 500,000 BTU/hr). Both list the same published thermal efficiency of 85%.
Laars Pennant PNCH 750 lists 95 lb more shipping weight than Laars Pennant PNCH 500 (735 lb against 640 lb).
Both records print the same thermal efficiency (85%), water connections (2"), gas connection (1-1/4") and firing (Staged, up to 4:1), per the cited sources.
Laars Heating Systems
The Laars Pennant PNCH 500 is a fan-assisted, non-condensing commercial hydronic boiler rated 500,000 BTU/hr input and 425,000 BTU/hr output at 85% thermal efficiency, with stage firing up to 4:1.
Laars Heating Systems
The Laars Pennant PNCH 750 is a fan-assisted, non-condensing commercial hydronic boiler rated 750,000 BTU/hr input and 638,000 BTU/hr output at 85% thermal efficiency, with stage firing up to 4:1.
The Laars Pennant PNCH 750 lists 750,000 BTU/hr, against 500,000 BTU/hr on the Laars Pennant PNCH 500, per the cited documentation.
Both list the same thermal efficiency of 85%.
It ships at 735 lb against 640 lb for the Laars Pennant PNCH 500, per the cited sources.
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.