Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
The XFIIRE H7-1000B adds 200 MBTUH of input and 192 MBTUH of output over the XFIIRE H7-800B on the same XFIIRE platform. The 1000B is the top XFIIRE size: 1,000 MBTUH input and 960 MBTUH output, with 2-1/2 in water connections and a 627 lb shipping weight.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Raypak XFIIRE H7-800B | Raypak XFIIRE H7-1000B |
|---|---|---|
| Input | 800 MBH | 1,000 MBH |
| Output | 768 MBH | 960 MBH |
| AHRI thermal efficiency | 96 % | 96 % |
| Turndown | 7:1 | 7:1 |
| Water connection | 2" NPT | 2-1/2" NPT |
| Flue outlet | 6 in | 6 in |
| Weight | 547 lb | 627 lb |
The H7-800B is rated 800 MBTUH input and 768 MBTUH output with 7:1 turndown; the H7-1000B is rated 1,000 MBTUH input and 960 MBTUH output with 7:1 turndown. Both models carry the same published efficiency figure, so capacity is the variable rather than efficiency.
The 1000B is the top XFIIRE size: 1,000 MBTUH input and 960 MBTUH output, with 2-1/2 in water connections and a 627 lb shipping weight. Both share the same 90 gpm maximum water flow, so the step up does not enlarge the pump or piping envelope. Shipping or operating weight moves from 547 lb to 627 lb, which matters for rigging and floor loading.
Both sizes are documented in the same official Raypak submittal for the XFIIRE 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 XFIIRE H7-800B is a condensing commercial hydronic boiler rated 800 MBTUH input and 768 MBTUH output at 96% AHRI thermal efficiency, with 7:1 turndown, Category IV venting and 90 gpm maximum flow per submittal 241854.
Raypak
The Raypak XFIIRE H7-1000B is a condensing commercial hydronic boiler rated 1000 MBTUH input and 960 MBTUH output at 96% AHRI thermal efficiency, with 7:1 turndown, Category IV venting and 90 gpm maximum flow per submittal 241854.
The H7-1000B at 1,000 MBTUH input and 960 MBTUH output, per submittal 241854.
Both use 6 in flue and air and a 1-1/4 in gas connection; the 1000B steps the water connections up to 2-1/2 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.