Viessmann Vitodens 100-W
Model Number: B1HE/B1KE
Premium Viessmann condensing boiler balancing quality and value.
Technical Specifications
Source: manufacturer spec sheet · checked Sep 27, 2026
Prices depend on sizing, venting and piping in your home, so we quote every installation.
Sizing: the right size comes from a room-by-room heat-loss calculation, not the size of the old boiler or a rule of thumb. Oversized boilers short-cycle and waste fuel; steam systems are sized to the connected radiation instead. See how we approach boiler installation.
Home-Specific Operating Cost Review
No guaranteed annual savings or payback period
Historical Use
Fuel consumption and weather
Current Rates
Utility and delivered-fuel prices
System Design
Load, piping, controls, and temperatures
Full Specifications
- Model Number
- B1HE/B1KE
- Efficiency (AFUE)
- 96%
- Boiler Type
- Condensing Boiler
- Fuel
- natural gas/propane
- Venting
- PVC/CPVC/PP concentric or two-pipe
- BTU Input Range
- 20k - 120k BTU
- Domestic Hot Water
- yes
- In Production
- Yes
- Parts Warranty
- 2 years standard (5 years if registered within 60 days); limited lifetime pressure vessel/HX
- Heat Exchanger Warranty
- limited lifetime (residential)
Specifications sourced from the manufacturer spec sheet, checked Sep 27, 2026.
Ideal For
High-end homes seeking German engineering without flagship pricing
Expert Review: Viessmann Vitodens 100-W
The Viessmann Vitodens 100-W brings German engineering to a more accessible price point. At 95% AFUE, this condensing boiler qualifies for PSEG Long Island rebates up to $800 while delivering the renowned Viessmann quality. Nassau County homeowners in Manhasset, Roslyn, and Garden City appreciate the premium build without flagship pricing.
The Inox-Radial stainless steel heat exchanger carries a 12-year warranty and is designed for Long Island's challenging water conditions. Digital modulating controls maintain consistent comfort while minimizing fuel consumption.
Compact wall-mount installation saves valuable basement floor space—a significant advantage in finished basements or utility areas. Ultra-quiet operation under 50 dB means the boiler won't disturb living spaces.
For coastal communities, the stainless construction resists salt air corrosion better than aluminum alternatives. Annual maintenance keeps the unit running at peak efficiency for 20+ years.
Our recommendation: The Vitodens 100-W is ideal for quality-conscious homeowners who want German engineering without the flagship price tag. Perfect for 2,500-4,000 square foot homes with hot water baseboard or radiant heat.
Key Features & Technology
Inox-Radial stainless steel
Digital modulating burner
Compact wall-mount design
Outdoor temperature sensor
Energy Star certified
Advantages
- Premium German quality at mid-tier pricing
- 95% AFUE qualifies for PSEG rebates
- Ultra-quiet operation
- 10+ year typical lifespan
Considerations
- Still premium pricing vs domestic brands
- Parts availability slower than local
- Annual maintenance required
Sizing & Installation Notes
Condensing boilers like the Vitodens 100-W reach their rated efficiency only when return water runs cool enough to condense flue gases. We check your radiation and design water temperatures so the unit actually condenses in your home, not just on the spec sheet.
Every Viessmann installation starts with a free in-home assessment covering the heat-loss calculation, venting and chimney condition, and gas or oil supply sizing. Learn more about our boiler installation process, or see current rebate and incentive programs that may apply.
Warranty & Protection
Parts Warranty
2 years standard (5 years if registered within 60 days); limited lifetime pressure vessel/HX
Heat Exchanger
limited lifetime (residential)
Our Guarantee
100% Satisfaction
All Viessmann boiler installations by Home+ Air & Heat include our 1-year workmanship warranty, covering labor and any installation-related issues.
Compare the Viessmann Lineup
| Model | Efficiency | BTU Range | Fuel | Heat Exchanger Warranty |
|---|---|---|---|---|
| Vitodens 100-W (this model) | 96% AFUE | 20k - 120k BTU | natural gas/propane | limited lifetime (residential) |
| Vitodens 200-W | 96% AFUE | 20k - 199k BTU | natural gas/propane | limited lifetime (residential) |
| Vitodens 111-W | 97% AFUE | 57k - 150k BTU | — | 12 years |
| Vitocrossal 300 CA3B | 96.1% AFUE | 2500k - 6000k BTU | natural gas/propane | — |
| Vitocrossal 200 CI2 | 98% AFUE | 399k - 2000k BTU | natural gas/propane | — |
| Vitorond 100 | 86% AFUE | 91k - 245k BTU | oil | residential limited 20-year cast-iron section (commercial 10-year) |
| Vitorond 200 | 87.9% AFUE | 490k - 4387k BTU | oil | — |
| Vitodens 222-F | 95% AFUE | 12k - 125k BTU | natural gas/propane | limited lifetime (residential) |
| Vitocal 100-AW | Not verified | 21k - 58k BTU | electric | — |
| Vitocrossal 200 CM2 | 95% AFUE | 131k - 2245k BTU | natural gas/propane | — |
| Vitocrossal 300 CU3A | 98% AFUE | 19k - 199k BTU | natural gas/propane | — |
See the full Viessmann brand page for lineup context, or browse the Best Condensing Boilers guide to compare across brands.
Frequently Asked Questions
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