Viessmann · Vitodens 100-W (B1HE / B1KE)
Viessmann Vitodens 100-W B1KE-120
The Vitodens 100-W B1KE-120 is Viessmann Canada's compact combi boiler: 12 to 120 MBH heating input at 95% AFUE with on-demand domestic hot water, a 3.3 USG/min continuous draw at a 77°F rise, and up to 140 MBH of DHW input per the technical data manual.
Key figures
- Max input
- 120 MBH
- Max CSA output
- —
- AFUE
- 95 %
- Min input
- 12 MBH
Input is gas energy consumed; output is heat delivered. Never size from input alone.
Viessmann Vitodens 100-W B1KE-120 in practice
The B1KE-120 is the combi version of the 120: it heats the house like the B1HE-120 and adds on-demand domestic hot water through an integrated plate heat exchanger, so no separate tank is needed. Space heating runs 12 to 120 MBH input, and the technical data manual lists a maximum DHW input of 140 MBH (41.0 kW) for hot-water draws — a figure the product page does not publish.
Its continuous DHW draw is 3.3 USG/min at a 77°F rise, per Viessmann Canada, which suits households of one or two bathrooms where draws do not all peak at once. The boiler weighs 110 lb (50 kg) in the same 17.75 x 19.75 x 33.75 inch cabinet as the heating-only 120.
For a compact Vancouver home or townhouse wanting a single gas appliance for heat and hot water, the B1KE-120 replaces the boiler-and-tank pair; the larger B1KE-199 steps the heating input up to 199 MBH and the DHW draw to 4.7 USG/min.
Best suited to
- Townhouses, suites and compact detached homes wanting one appliance for heat and hot water
- Households with modest simultaneous DHW demand (up to about 3.3 USG/min continuous)
- Tight mechanical spaces where the 110 lb combi cabinet fits
Applicability and support
- Model number
- B1KE-120
- Canadian availability
- available
- Production status
- current
- ROMA supplies
- Confirmed at consultation
- ROMA services
- Confirmed at consultation
- Warranty
- Series terms
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 | ||
| Heating input, minimum (natural gas) | 12 MBH | 3.5 kW |
| Heating input, maximum (natural gas) | 120 MBH | 35.2 kW |
| Efficiency | ||
| Efficiency (AFUE) | 95 % | 95% AFUE on all models per the Canadian product page. |
| Domestic hot water | ||
| DHW input, maximum | 140 MBH | Per the technical data manual (page 102); the product page does not publish it. |
| Continuous DHW draw at 77°F rise | 3.3 USG/min | At a 77°F (43K) rise, per the Canadian product page. |
| Domestic hot water | Combi: on-demand DHW via an integrated plate heat exchanger | |
| Venting and air | ||
| Maximum vent run | 180 ft | As published; see the technical data manual for per-size and pipe-material limits. |
| Physical and connections | ||
| Weight | 110 lb | 50 kg |
| Width | 17.75 in | 450 mm |
| Depth | 19.75 in | 500 mm |
| Height | 33.75 in | 859 mm |
| Operating limits and other | ||
| Fuel | Natural gas or liquid propane | No mechanical fuel-conversion adjustment required per the Canadian product page. |
| Turndown ratio | up to 10:1 | Manufacturer claim; natural gas at high fire. |
Manuals
- Installation and Service Instructions — Vitodens 100-W B1HE and B1KE combi series, doc 6167 818 - 226167 818 - 22 · 2026-02
- Technical Data Manual — Vitodens 100-W B1HE/B1KE, doc 5472 801 - 095472 801 - 09 · 2026-02
Alerts documented for this model
- F.5
- F.7
- F.8
- F.13
- F.14
- F.49
- F.50
- F.59
- F.62
- F.63
- F.67
- F.68
- F.69
- F.70
- F.71
- F.72
- F.73
- F.74
- F.77
- F.89
- F.142
- F.160
- F.161
- F.163
- F.182
- F.183
- F.184
- F.185
- F.299
- F.342
- F.345
- F.346
- F.348
- F.349
- F.350
- F.351
- F.352
- F.353
- F.354
- F.355
- F.357
- F.359
- F.361
- F.366
- F.367
- F.369
- F.370
- F.372
- F.373
- F.377
- F.378
- F.379
- F.380
- F.381
- F.382
- F.383
- F.384
- F.385
- F.386
- F.387
- F.388
- F.395
- F.396
- F.399
- F.400
- F.401
- F.402
- F.403
- F.404
- F.405
- F.406
- F.408
- F.410
- F.416
- F.417
- F.418
- F.425
- F.430
- F.446
- F.447
- F.448
- F.449
- F.450
- F.451
- F.452
- F.453
- F.454
- F.455
- F.456
- F.457
- F.463
- F.464
- F.467
- F.468
- F.471
- F.473
- F.474
- F.527
- F.528
- F.540
Frequently asked questions
How much hot water can the B1KE-120 deliver?
3.3 USG/min continuously at a 77°F rise per Viessmann Canada, with a maximum DHW input of 140 MBH per the technical data manual. Two simultaneous showers can exceed that continuous figure, which is why the B1KE-199 exists.
What is the difference between the B1KE-120 and the B1HE-120?
The heating side is the same 12 to 120 MBH range at 95% AFUE. The B1KE-120 adds on-demand DHW through a plate heat exchanger (weighing 110 lb vs 108 lb), while the B1HE-120 is heating-only and uses an indirect tank.
Does the B1KE-120 run on propane?
Yes. Viessmann Canada lists natural gas or liquid propane with no mechanical fuel-conversion adjustment; published minimum inputs are natural-gas figures, and the technical data manual covers propane operation.
Questions about the Viessmann Vitodens 100-W B1KE-120?
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 100-W B1KE-120 vs B1KE-199Comparison
- Viessmann Vitodens 100-W B1HE-85Same series
- Viessmann Vitodens 100-W B1HE-120Same series
- Viessmann Vitodens 100-W B1HE-150Same series
- Viessmann Vitodens 100-W B1HE-199Same series
- Viessmann Vitodens 100-W B1KE-199Same series
- Vitodens 100-W (B1HE / B1KE) series hub
- Buying guide
Sources and verification
- Viessmann Canada — Vitodens 100-W, B1HE/B1KE product page · accessed September 7, 2026
- Installation and Service Instructions — Vitodens 100-W B1HE/B1KE, doc 6167 818 - 22 · 6167 818 - 22 · accessed September 7, 2026
- Technical Data Manual — Vitodens 100-W B1HE/B1KE, doc 5472 801 - 09 · 5472 801 - 09 · accessed September 7, 2026
Facts checked September 7, 2026. Last updated September 7, 2026. Technical reviewer: not yet assigned.