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Comparison
Verdict in brief
The B2HE-150 and B2HE-199 are the two largest Vitodens 200-W models and are physically identical: 179 lb, the same 39-inch cabinet, the same 14 MBH minimum fire, 95% AFUE and the flagship 7-inch touchscreen. The 199 simply fires higher — 199 MBH against 150 MBH — which gives it the widest modulation range in the series and the headroom large homes and small multi-suite buildings may need.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Viessmann Vitodens 200-W B2HE-150 | Viessmann Vitodens 200-W B2HE-199 |
|---|---|---|
| Input, minimum (natural gas) | 14 MBH | 14 MBH |
| Input, maximum (natural gas) | 150 MBH | 199 MBH |
| Efficiency (AFUE) | 95 % | 95 % |
| Weight | 179 lb | 179 lb |
| Domestic hot water | Not a combi; pair with an indirect tank | Not a combi; pair with an indirect tank |
The 150 and 199 share everything except the top of the firing range: both weigh 179 lb (81 kg) in the 17.75 x 21.75 x 39 inch cabinet, both fire down to 14 MBH on natural gas, both carry the 7-inch colour touchscreen control suite, and both are rated 95% AFUE as heating-only models.
Maximum input is the differentiator: 150 MBH (44.0 kW) for the 150 against 199 MBH (58.3 kW) for the 199. Because minimum fire is the same 14 MBH on both, the 199's wider range is what sits behind Viessmann's up to 14:1 turndown claim — and it costs nothing in low-fire behaviour.
Both models pair with an indirect tank for domestic hot water and share the series' venting reach of about 198 ft (60 m). The decision is purely the calculated peak load: a home or small multi-suite building whose heat loss plus recovery demand approaches 199 MBH needs the 199; below that, the 150 delivers identical behaviour at lower cost.
Viessmann
The Vitodens 200-W B2HE-150 is the larger-cabinet mid-high model of Viessmann Canada's B2HE series: 14 to 150 MBH input at 95% AFUE, weighing 179 lb with the 7-inch touchscreen of the flagship platform.
Viessmann
The Vitodens 200-W B2HE-199 is the largest model of Viessmann Canada's B2HE series: 14 to 199 MBH input at 95% AFUE, with the widest modulation range in the line and the flagship 7-inch touchscreen control.
No. Both weigh 179 lb (81 kg) and share the same 17.75 x 21.75 x 39 inch cabinet; only the maximum input differs (150 vs 199 MBH).
Yes — Viessmann Canada lists a 14,000 BTU/h minimum input for both, so the 199's wider range is pure headroom at the top end.
When the heat-loss calculation and indirect-tank recovery demand more than the 150 can deliver on a design day. Otherwise the 150 behaves identically at low fire.
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 7, 2026. Last updated September 7, 2026. Technical reviewer: not yet assigned.