Viessmann · Vitodens 200-W (legacy B2HA / B2HB)
Viessmann Vitodens 200-W WB2B-80
The Vitodens 200-W WB2B-80 opens the WB2B large chassis: 104 to 285 MBH NG/LPG input at 96.1% AFUE in a 225 lb (102 kg) wall-hung boiler.
Key figures
- Max input
- 285 MBH
- Max CSA output
- —
- AFUE
- 96.1 %
- Min input
- 104 MBH
Input is gas energy consumed; output is heat delivered. Never size from input alone.
Viessmann Vitodens 200-W WB2B-80 in practice
The WB2B-80 is the first WB2B model on the large chassis: 104-285 MBH (30-83 kW) input, 95-260 MBH (28-76 kW) output and a 226 MBH Net I=B=R rating at 96.1% AFUE. It weighs 225 lb (102 kg) with 3.4 USG of boiler water and a 60 psig maximum operating pressure.
Dimensions are 19 x 21 x 33½ in (480 x 530 x 850 mm), with 1¼ in. supply and return and 1 in. gas connections. The 80 and 105 models share installation and service instructions and support multi-boiler installations with the Vitocontrol-S cascade control, documented up to four boilers.
Best suited to
- Owners of existing WB2B-80 units looking up printed ratings
- Large residential and light-commercial loads from 104 MBH
- Documentation for the first large-chassis WB2B size
Applicability and support
- Model number
- WB2B-80
- Canadian availability
- historical
- Production status
- discontinued
- ROMA supplies
- Confirmed at consultation
- ROMA services
- Confirmed at consultation
- Warranty
- Not verified
Where ROMA provides on-site service
On-site service is currently offered in Greater Vancouver, BC, including Vancouver, Burnaby, Richmond, Surrey, Coquitlam, North Vancouver, West Vancouver, New Westminster, Port Coquitlam, Port Moody, Delta, Langley, Maple Ridge, Abbotsford, Chilliwack, White Rock, Pitt Meadows, Tsawwassen, Anmore, Lions Bay, Belcarra, Bowen Island, Mission. Everything else on this site is reference information you can use anywhere in Canada.
Specifications
Published specifications
Values as published by Viessmann. Units are shown with every value; notes flag conflicting sources or missing figures.
| Specification | Value | Note |
|---|---|---|
| Input | ||
| CSA input, minimum (NG/LPG) | 104 MBH | 30 kW, per the technical data manual |
| CSA input, maximum (NG/LPG) | 285 MBH | 83 kW, per the technical data manual |
| Output | ||
| CSA output / DOE heating capacity | 95-260 MBH | 28-76 kW, based on 140°F / 120°F supply/return |
| Net I=B=R rating | 226 MBH | Based on piping and pick-up allowance of 1.15. |
| Efficiency | ||
| Efficiency (AFUE) | 96.1 % | 96.1% AFUE per the technical data manual. |
| Physical and connections | ||
| Weight | 225 lb | 102 kg |
| Width | 19 in | 480 mm |
| Depth | 21 in | 530 mm |
| Height | 33.5 in | 850 mm |
| Operating limits and other | ||
| Fuel | Natural gas or liquid propane gas | NG minimum supply pressure 4 in. w.c.; LPG 10 in. w.c. |
| Boiler water content | 3.4 USG | |
| Maximum operating pressure | 60 psig | At 210°F (99°C). |
| Boiler heating supply / return | 1¼ in. NPTM | Gas valve connection 1 in. NPTF; pressure relief and drain valves ¾ in. |
Manuals
- Technical Data Manual — Vitodens 200-W WB2B Series, doc 5369 295 v1.55369 295 v1.5 · 2012-09
- Installation Instructions — Vitodens 200-W WB2B 19, 26, 35, rev 1.61.6 · 2011-12
- Technical Data Manual — Vitodens 200-W WB2 Series, rev 3.43.4 · 2008-01
Alerts documented for this model
None documented yet.
Frequently asked questions
What is the WB2B-80 rated at?
104-285 MBH (30-83 kW) NG/LPG input, 95-260 MBH (28-76 kW) output, a 226 MBH Net I=B=R rating and 96.1% AFUE.
How heavy is the WB2B-80?
225 lb (102 kg) with 3.4 USG of boiler water, in the 19 x 21 x 33½ in large chassis shared with the WB2B-105.
Can WB2B-80 boilers be combined?
Yes — the technical data manual documents multi-boiler installations of the WB2B 80 and 105 models with the Vitocontrol-S, WB2B cascade control; the manual's system guide describes combinations up to four boilers.
Questions about the Viessmann Vitodens 200-W WB2B-80?
Describe what the boiler is doing and get a straight answer about the next step.
On-site service in Greater Vancouver, BC. ROMA lists “Open 7 days” on its site; call to confirm same-day availability.
Compare and explore
- Viessmann Vitodens 200-W WB2B-80 vs WB2B-105Comparison
- Viessmann Vitodens 200-W WB2B-19Same series
- Viessmann Vitodens 200-W WB2B-26Same series
- Viessmann Vitodens 200-W WB2B-35Same series
- Viessmann Vitodens 200-W WB2B-45Same series
- Viessmann Vitodens 200-W WB2B-60Same series
- Viessmann Vitodens 200-W WB2B-105Same series
- Vitodens 200-W (legacy B2HA / B2HB) series hub
- Buying guide
Sources and verification
- Technical Data Manual — Vitodens 200-W WB2B Series, doc 5369 295 v1.5 · 5369 295 v1.5 · accessed September 9, 2026
- Viessmann Canada — Historic manuals · accessed September 9, 2026
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.