Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
The Pennant PNCH1000 and PNCH1250 are adjacent staged sizes: 1,000,000 versus 1,250,000 BTU/hr input and 850,000 versus 1,065,000 BTU/hr output. The 1250 moves up to a 2" gas connection; both are 85.0-85.1% thermal efficiency.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Laars Pennant PNCH 1000 | Laars Pennant PNCH 1250 |
|---|---|---|
| Input | 1,000,000 BTU/hr | 1,250,000 BTU/hr |
| Output | 850,000 BTU/hr | 1,065,000 BTU/hr |
| Efficiency (thermal) | 85 % | 85.1 % |
| Gas connection | 1-1/2" | 2" |
| Water connection | 2-1/2" | 2-1/2" |
| Shipping weight | 830 lb | 925 lb |
| Firing | Staged, up to 4:1 | Staged, up to 4:1 |
| Venting | Category I or III fan-assisted | Category I or III fan-assisted |
The Document 1558 submittal lists the PNCH1000 at 1,000,000 BTU/hr input, 850,000 BTU/hr output and 85.0% thermal efficiency; the PNCH1250 lists 1,250,000 BTU/hr input, 1,065,000 BTU/hr output and 85.1%.
Gas connection steps from 1-1/2" to 2" and shipping weight from 830 to 925 lb, while both keep 2-1/2" water connections and stage firing up to 4:1.
Both are non-condensing, fan-assisted units with the Laars Linc control and Category I/III venting from the top or back.
Laars Heating Systems
The Laars Pennant PNCH 1000 is a fan-assisted, non-condensing commercial hydronic boiler rated 1,000,000 BTU/hr input and 850,000 BTU/hr output at 85% thermal efficiency, with stage firing up to 4:1.
Laars Heating Systems
The Laars Pennant PNCH 1250 is a fan-assisted, non-condensing commercial hydronic boiler rated 1,250,000 BTU/hr input and 1,065,000 BTU/hr output at 85.1% thermal efficiency, with stage firing up to 4:1.
The Document 1558 submittal prints 85.0% for the 500-1000 sizes and 85.1% for the 1250-2000 sizes.
It uses stage firing up to 4:1 rather than full modulation, with the Laars Linc control managing stages and cascade.
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.