Boiler Viessmann Vitodens 100-W Series Capacity 125,000 BTU

  • Rating
  • Capacity125000
  • AFUE95%
  • Fuel TypeNatural Gas
  • CSA ListedYes
  • ASME CertifiedYes
  • Energy Star ListedYes
  • AHRI CertifiedYes
  • WarrantyUp to 10 years on parts
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Boiler Viessmann Vitodens 100-W Series Capacity 125,000 BTU


Viessmann offers a comprehensive range of home comfort products that sets the standards for sustainability and efficiency. The Viessmann Vitodens 100 boiler was introduced to offer the perfect mix of performance and value. The Vitodens 100 features a compact design and quiet operation, making it the ideal boiler for small spaces. Equipped with state-of-the-art Viessmann radial heat exchangers and cylinder burners, the entire Vitodens lineup boasts a 95% AFUE rating. With versatile venting options and user-friendly controls, the Vitodens 100 is a favorite among professionals and homeowners alike.

Inox-Radial Heat Exchanger

  • The Vitodens 100 boiler features a unique and highly efficient Inox-Radial heat exchanger designed and manufactured by Viessmann. Additionally, this self-cleaning heat exchanger contributes to the Vitodens’s long service life and dependable performance.

Installation and Service Flexibility

  • The Vitodens 100 was designed for ease of installation and maintenance with all bottom pipe connections, accessible service components, fuel flexibility, and multiple venting options.

Touchscreen Control

  • With easy-to-use touchscreen control, the backlit LCD display features advanced programming options, so you can easily set the boiler to your liking.

Compact Size

  • For the amount of power harnessed within the Vitodens 100 unit, you wouldn’t expect such a small package. Perfect for installations in tight spaces, the Vitodens 100 doesn’t need clearance to combustibles and features low-noise operation.


  • ModelB1HA125
  • Fuel TypeNatural Gas
  • Combustion TypeCondensing
  • Vent TypeDirect Vent
  • Modulating/StagingModulating
  • Mount TypeWall
  • Minimum Altitude0 Feet
  • Maximum Altitude10000 Feet
  • Includes PumpYes
  • AFUE95%
  • Maximum Input Capacity125000 BTU
  • Minimum Input Capacity21000 BTU
  • DOE Heating Capacity116000 BTU
  • Net I=B=R Capacity101000 BTU
  • Ultra Low NOx EmissionsNo
  • Voltage115 Volts
  • Phase1
  • Frequency60 Hz
  • Flue Connection Size2 Inches
  • Gas Connection Size3/4 Inch
  • Supply Connection1 Inch
  • Return Connection1 Inch
  • Product Height30 1/8 Inches
  • Product Width15 3/4 Inches
  • Product Depth79.4 Pounds
  • Product Weight88 Pounds
  • CSA ListedYes
  • ASME CertifiedYes
  • Energy Star ListedYes
  • AHRI CertifiedYes
  • AHRI Reference Number10594297
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Boiler Viessmann Vitodens 100-W Series Capacity 125,000 BTU


*15-Year Limited Warranty on covered components

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