Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
The CI2-1500 and CI2-2000 are the two largest Vitocrossal 200 CI2 models and the top of the series. The 2000 fires to 2000 MBH against the 1500's 1500 MBH but lifts its minimum fire from 50 to 100 MBH, weighs 1969 lb against 1812 lb, prints the series' lowest efficiency row (96.5% vs 96.6%), and holds less water — 99 USG against the 1500's 113 USG — with an 8-inch flue collar against 6 inches.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Viessmann Vitocrossal 200 CI2-1500 | Viessmann Vitocrossal 200 CI2-2000 |
|---|---|---|
| Rated input, minimum (natural gas/LPG) | 50 MBH | 100 MBH |
| Rated input, maximum (natural gas/LPG) | 1,500 MBH | 2,000 MBH |
| Combustion efficiency | 96.6 % | 96.5 % |
| Weight | 1,812 lb | 1,969 lb |
| Boiler water content | 113 USG | 99 USG |
Both models sit on the CI2 large chassis with two burner control units and the Viessmann One Base control platform, but their printed figures diverge in nearly every row. Maximum input rises from 1,500,000 to 2,000,000 BTU (440 to 586 kW), while the minimum fire steps up from 50,000 to 100,000 BTU (14.7 to 29.3 kW).
Weight grows from 1812 lb (822 kg) to 1969 lb (893 kg) and the flue collar from 6 to 8 inches — the largest in the line. Notably, the CI2-2000 prints 99 USG of boiler water content, 14 USG less than the CI2-1500's 113 USG, even though the page's '99 USG' water-volume headline matches only the 2000 row.
The printed combustion-efficiency rows sit at 96.6% (CI2-1500) and 96.5% (CI2-2000), the lowest figures in the series. Both share the Inox-Crossal heat exchanger, MatriX cylinder burner with Lambda PrO₂ trim and no-required-primary-pump design; the 2000 earns its place only when per-boiler capacity beyond 1500 MBH is genuinely needed, since its minimum fire is double the 1500's.
Viessmann
The Vitocrossal 200 CI2-1500 is the first model of the CI2 large chassis: 50 to 1500 MBH rated input (14.7 to 440 kW) — the widest printed firing range in the series — at 96.6% combustion efficiency, weighing 1812 lb (822 kg) with 113 USG of boiler water content.
Viessmann
The Vitocrossal 200 CI2-2000 tops the CI2 line at 2000 MBH: 100 to 2000 MBH rated input (29.3 to 586 kW) at 96.5% combustion efficiency, weighing 1969 lb (893 kg) with 99 USG of boiler water content.
Yes, in most printed rows: the 2000 weighs 1969 lb (893 kg) against 1812 lb (822 kg), uses an 8-inch flue collar against 6 inches, and holds 99 USG of water against the 1500's 113 USG.
Per the technical data manual, the CI2-2000 prints 99 USG and the CI2-1500 prints 113 USG. The page's 99 USG headline matches the 2000 row only.
When the design load approaches 2000 MBH per boiler. Its 100 MBH minimum fire and slightly lower efficiency row mean a plant that fits the 1500 will idle lower and print a marginally higher efficiency figure.
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.