Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
The XVers L H7-856L adds 125 MBTUH of input and 121 MBTUH of output over the XVers L H7-726L on the same XVers L platform. The 856L is the top of the XVers L range: 850 MBTUH input against the 726L's 725, with identical connections, flow allowance and 7:1 turndown.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Raypak XVers L H7-726L | Raypak XVers L H7-856L |
|---|---|---|
| Input | 725 MBH | 850 MBH |
| Output | 705 MBH | 826 MBH |
| AHRI thermal efficiency | 97.3 % | 97.2 % |
| Turndown | 7:1 | 7:1 |
| Water connection | 2-1/2" NPT | 2-1/2" NPT |
| Weight | 710 lb | 720 lb |
| Maximum water flow | 114 GPM | 114 GPM |
The H7-726L is rated 725 MBTUH input and 705 MBTUH output with 7:1 turndown; the H7-856L is rated 850 MBTUH input and 826 MBTUH output with 7:1 turndown. H7-726L is rated 97.3% and H7-856L 97.2% in the same efficiency column, so the larger size does not give up rated efficiency.
The 856L is the top of the XVers L range: 850 MBTUH input against the 726L's 725, with identical connections, flow allowance and 7:1 turndown. Both share the same 114 gpm maximum water flow, so the step up does not enlarge the pump or piping envelope. Shipping or operating weight moves from 710 lb to 720 lb, which matters for rigging and floor loading.
Both sizes are documented in the same official Raypak submittal for the XVers L 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 XVers L H7-726L is a condensing firetube commercial hydronic boiler rated 725 MBTUH input and 705 MBTUH output at 97.3% AHRI thermal efficiency, with 7:1 turndown, Category IV venting and a maximum water flow of 114 gpm per the 241896 submittal.
Raypak
The Raypak XVers L H7-856L is a condensing firetube commercial hydronic boiler rated 850 MBTUH input and 826 MBTUH output at 97.2% AHRI thermal efficiency, with 7:1 turndown, Category IV venting and a maximum water flow of 114 gpm per the 241896 submittal.
The H7-856L at 850 MBTUH input and 826 MBTUH output, the top of the 406L-856L submittal.
Yes — 2-1/2 in water, 6 in flue and 6 in air, with a 1-1/4 in gas connection and 114 gpm maximum flow on both.
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.