Vitodens 100-W WB1B

The perfect mix of value, performance and quality

Vitodens 100-W is a gas-fired wall-mounted condensing boiler with MatriX cylinder burner and Inox-Radial heat exchanger made of stainless steel. Rated input: 37 to 118 MBH.

Optional CombiPLUS Kit for on-demand DHW
Integrated OpenTherm communication ability

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Easy installation and service

All pipe connections located at the bottom and serviceable components accessible from the front.

Highly efficient

94% AFUE rating on all models.

Limited lifetime warranty

In residential applications.


Discontinuation notice

The Vitodens 100 WB1B boiler series has been discontinued. If you are looking to purchase a new residential gas-fired boiler, please consider the Vitodens 100-W B1HE or B1KE series.

Reliable and consistent performance

Stainless steel is the best choice for long-term reliability. That's why the Vitodens 100 is equipped with a stainless steel Inox-Radial heat exchanger and MatriX cylinder burner. Developed and manufactured by Viessmann, these high-quality stainless steel components maximize performance and reliability. Plus, the "self-cleaning" heat exchanger contributes to the boiler’s long service life and dependable performance.

Lifetime warranty

With a limited lifetime warranty in residential applications, you can be sure your investment will deliver long-lasting value, year after year. For detailed terms and conditions, see the warranty sheet.

Stainless steel Inox-Radial heat exchanger

Advantages of the Vitodens 100-W

Fits any home and budget with high performance at an attractive price.
Exceeds Energy Star efficiency requirements.
Lasting performance with proven Viessmann stainless steel Inox-Radial heat exchanger.
Low-emission combustion for environmentally-friendly operation.
Easy expansion with CombiPLUS Kit for energy-saving, on-demand DHW.
Greater venting flexibility with vent length up to 200 ft and multiple venting options.
Suitable for altitude levels of up to 10,000 ft. / 3,000 m.
Extremely quiet operation; quieter than most refrigerators.

Product details

Fuel type

Natural gas (NG) or liquid propane gas (LPG)

Min. input

37,000 BTU (10.8 kW)

Max. input

91,000 BTU (26.7 kW) for WB1B-26
118,000 BTU (34.6 kW) for WB1B-35

Efficiency (AFUE)



78 lbs (34.1 kg)

Overall dimensions


14⅛ inches (360 mm)


15¾ inches (400 mm)


28½ inches (725 mm)


Limited lifetime warranty in residential applications. See warranty sheet for details.

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