Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
The MVB H7-2004A adds 499 MBTUH of input and 419 MBTUH of output over the MVB H7-1504A on the same MVB Category I & III platform. The 2004A is the largest Category I & III MVB at 1,999 MBTUH input, with a 2 in gas connection, a 14 in flue and a 940 lb operating weight.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Raypak MVB H7-1504A | Raypak MVB H7-2004A |
|---|---|---|
| Input | 1,500 MBH | 1,999 MBH |
| Output | 1,260 MBH | 1,679 MBH |
| AHRI thermal efficiency | 84 % | 84 % |
| Turndown | 1.7:1 | 1.7:1 |
| Water connection | 2-1/2" NPT | 2-1/2" NPT |
| Flue outlet | 12 in | 14 in |
| Weight | 780 lb | 940 lb |
The H7-1504A is rated 1,500 MBTUH input and 1,260 MBTUH output with 1.7:1 turndown; the H7-2004A is rated 1,999 MBTUH input and 1,679 MBTUH output with 1.7:1 turndown. Both models carry the same published efficiency figure, so capacity is the variable rather than efficiency.
The 2004A is the largest Category I & III MVB at 1,999 MBTUH input, with a 2 in gas connection, a 14 in flue and a 940 lb operating weight. Both share the same 113 gpm maximum water flow, so the step up does not enlarge the pump or piping envelope. Shipping or operating weight moves from 780 lb to 940 lb, which matters for rigging and floor loading.
Both sizes are documented in the same official Raypak submittal for the MVB Category I & III 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 MVB H7-1504A is a non-condensing modulating vertical commercial hydronic boiler rated 1500 MBTUH input and 1260 MBTUH output at 84% thermal efficiency, with Category I & III venting and a 12 in flue.
Raypak
The Raypak MVB H7-2004A is a non-condensing modulating vertical commercial hydronic boiler rated 1999 MBTUH input and 1679 MBTUH output at 84% thermal efficiency, with Category I & III venting and a 14 in flue.
The H7-2004A at 1,999 MBTUH input and 1,679 MBTUH output, per submittal 241864.
Yes — the submittal prints propane ratings and notes propane models use a 1 in NPT gas connection on all sizes.
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.