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 XTherm H7-2005A adds 499 MBTUH of input and 479 MBTUH of output over the XTherm H7-1505A on the same XTherm platform. The 2005A tops the 1005A-2005A group at 1,999 MBTUH input and steps the natural-gas connection up to 2 in NPT, still at 96% and 7:1.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Raypak XTherm H7-1505A | Raypak XTherm H7-2005A |
|---|---|---|
| Input | 1,500 MBH | 1,999 MBH |
| Output | 1,440 MBH | 1,919 MBH |
| AHRI thermal efficiency | 96 % | 96 % |
| Turndown | 7:1 | 7:1 |
| Flue outlet | 8 in | 8 in |
| Weight | 1,234 lb | 1,461 lb |
| Maximum water flow | 70 GPM | 70 GPM |
The H7-1505A is rated 1,500 MBTUH input and 1,440 MBTUH output with 7:1 turndown; the H7-2005A is rated 1,999 MBTUH input and 1,919 MBTUH output with 7:1 turndown. Both models carry the same published efficiency figure, so capacity is the variable rather than efficiency.
The 2005A tops the 1005A-2005A group at 1,999 MBTUH input and steps the natural-gas connection up to 2 in NPT, still at 96% and 7:1. Both share the same 70 gpm maximum water flow, so the step up does not enlarge the pump or piping envelope. Shipping or operating weight moves from 1,234 lb to 1,461 lb, which matters for rigging and floor loading.
Both sizes are documented in the same official Raypak submittal for the XTherm family, so the decision is a heat-loss and plant-layout question rather than a documentation difference: size to the calculated design-day load, then check flow, connection and venting dimensions against the submittal for the exact model.
Raypak
The Raypak XTherm H7-1505A is a vertical modulating condensing commercial hydronic boiler rated 1,500 MBTUH input and 1,440 MBTUH output at 96% thermal efficiency, with 7:1 turndown, Category IV venting and a 8 in flue.
Raypak
The Raypak XTherm H7-2005A is a vertical modulating condensing commercial hydronic boiler rated 1,999 MBTUH input and 1,919 MBTUH output at 96% thermal efficiency, with 7:1 turndown, Category IV venting and a 8 in flue.
The H7-2005A at 1,999 MBTUH input and 1,919 MBTUH output, per submittal 241869.
Yes — the submittal prints a 2 in NPT natural-gas connection against 1-1/4 in on the smaller sizes (propane models use 1 in NPT).
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.