Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
The B2HB 19, 68 and B2HB 26, 94 are the two smallest sizes of the previous-generation Vitodens 200-W line and share the 110 lb (50 kg) compact chassis, 95.0% AFUE and 45 psig rating. The 26, 94 fires to 94 MBH natural gas against the 19, 68's 68 MBH, but its propane minimum rises to 31 MBH from 12 — the practical difference for off-grid homes.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Viessmann Vitodens 200-W B2HB 19, 68 | Viessmann Vitodens 200-W B2HB 26, 94 |
|---|---|---|
| CSA input, minimum (natural gas) | 12 MBH | 19 MBH |
| CSA input, maximum (natural gas) | 68 MBH | 94 MBH |
| CSA input (liquid propane) | 12-68 MBH | 31-94 MBH |
| CSA output / DOE heating capacity (natural gas) | 11-64 MBH | 18-88 MBH |
| Net AHRI rating | 55 MBH | 77 MBH |
| Efficiency (AFUE) | 95 % | 95 % |
| Weight | 110 lb | 110 lb |
| Maximum operating pressure | 45 psig | 45 psig |
Both models are wall-hung condensing boilers from the B2HB generation, rated 95.0% AFUE with a 110 lb (50 kg) weight, 1.02 USG water content and 45 psig maximum operating pressure in the 17¾ x 15.7 x 41 in (450 x 400 x 1040 mm) cabinet.
The natural gas ranges are 12-68 MBH on the 19, 68 and 19-94 MBH on the 26, 94, with Net AHRI ratings of 55 and 77 MBH. On propane the tables diverge: the 19, 68 keeps the same 12-68 MBH range, while the 26, 94's propane minimum rises to 31 MBH. Output at 140°F / 120°F is 11-64 MBH and 18-88 MBH respectively.
Both must not be common-vented with any other appliance, and both fall under the same 21% high-altitude derate at 10,000 ft. The choice follows the heat-loss calculation: a load that fits the 19, 68 keeps the lowest minimum fire in the B2HB range.
Viessmann
The Vitodens 200-W B2HB 19, 68 is the smallest model of the previous-generation 200-W line: 12 to 68 MBH input at 95.0% AFUE in a 110 lb (50 kg) wall-hung cabinet, with a 55 MBH Net AHRI rating and a 45 psig maximum operating pressure.
Viessmann
The Vitodens 200-W B2HB 26, 94 steps the previous-generation line to 94 MBH: 19 to 94 MBH natural gas input (31 to 94 MBH on propane) at 95.0% AFUE in the 110 lb (50 kg) compact cabinet.
Yes. Both weigh 110 lb (50 kg) and measure 17¾ x 15.7 x 41 in (450 x 400 x 1040 mm) with 1.02 USG of boiler water.
The B2HB 19, 68, at 12 MBH on both natural gas and propane; the 26, 94 starts at 19 MBH on natural gas and 31 MBH on propane.
No. The technical data manual states the B2HB 19, 26, 35, 68, 94 and 125 models must not be common-vented with any other appliance.
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.