Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
The VANTAGE VTG-6000 adds 1,000,000 BTU/hr of input and 1,010,000 BTU/hr of output over the VANTAGE VTG-5000 on the same VANTAGE platform. The VTG-6000 is the largest Vantage at 6,000,000 BTU/hr input, with 480 gal of vessel water and a 14,800 lb operating weight — a substantial rigging step from the VTG-5000.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Fulton VANTAGE VTG-5000 | Fulton VANTAGE VTG-6000 |
|---|---|---|
| Rated input | 5,000,000 BTU/h | 6,000,000 BTU/h |
| Rated output | 4,630,000 BTU/h | 5,640,000 BTU/h |
| AHRI thermal efficiency | 92.6 % | 94 % |
| Boiler horsepower (BTS-2000) | 138 | 168 |
| Water connections | 6" ANSI 150# FLG | 6" ANSI 150# FLG |
| Dry weight | 6,900 lb | 10,800 lb |
| Water volume | 275 gal | 480 gal |
| Typical flow at rated output, 20°F ΔT | 463 GPM | 564 GPM |
The VTG-5000 is rated 5,000,000 BTU/hr input and 4,630,000 BTU/hr output with Up to 5:1 (natural gas) turndown; the VTG-6000 is rated 6,000,000 BTU/hr input and 5,640,000 BTU/hr output with Up to 5:1 (natural gas) turndown. Rated efficiency moves from 92.6% on the VTG-5000 to 94% on the VTG-6000 in the official thermal-efficiency column.
The VTG-6000 is the largest Vantage at 6,000,000 BTU/hr input, with 480 gal of vessel water and a 14,800 lb operating weight — a substantial rigging step from the VTG-5000. Typical flow at a 20°F rise rises from 463 gpm to 564 gpm, which sizes the primary loop. Dry weight steps from 6,900 lb to 10,800 lb, so rigging and floor loading should be checked against the larger unit.
Both sizes are documented in the same official Fulton data sheet, so the choice is a heat-loss and plant-layout decision: size to the design-day load, then verify connection sizes, venting and weight against the sheet for the exact model.
Fulton
The Fulton VANTAGE VTG-5000 is a condensing firetube commercial hydronic boiler rated 5,000,000 BTU/hr input and 4,630,000 BTU/hr output at 92.6% thermal efficiency, with up to 5:1 natural-gas turndown per the official Vantage TDS.
Fulton
The Fulton VANTAGE VTG-6000 is a condensing firetube commercial hydronic boiler rated 6,000,000 BTU/hr input and 5,640,000 BTU/hr output at 94% thermal efficiency, with up to 5:1 natural-gas turndown per the official Vantage TDS.
The VTG-6000 at 6,000,000 BTU/hr input and 5,640,000 BTU/hr output, per the Standard TDS; larger loads move to the ENDURA+.
The TDS prints 14,800 lb operating weight against 9,200 lb for the VTG-5000, with water volume rising from 275 to 480 gal.
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.