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With the new CombiPLUS Kit, enjoy all the benfits of a Vitodens 100 boiler along with on-demand domestic hot water. Enjoy DHW at the snap of your fingers all day long with an outstanding flow rate of up to 3.6 GPM. The CombiPLUS Kit installs underneath or beside the boiler and requires only minimal piping and electrical connections.

Features & Benefits of Vitodens with CombiPLUS Kit:
  • All the benefi ts of a Vitodens 100 boiler, plus on-demand domestic hot water (DHW) with CombiPLUS Kit.
  • Outstanding Efficiency of 95.2% A.F.U.E. on all models and energy-efficient and low-cost due to on-demand indirect-firedDHW production.
  • Lasting Performance with industry-leading Viessmann made SA240 316 Ti stainless steel Inox-Radial heat exchanger constructed to CSA B51 and ASME Section IV.
  • Space-saving and lightweight wall-mount design. More compact than any other hot water heater.
  • Quality you can count on! Stainless steel heat exchanger, built-in pressure bypass and 150 psig working pressure rating.
  • Low-Emission Combustion with Viessmann made stainless steel MatriX cylinder burner for natural gas or propane. Factory calibrated.
  • Complete space / DHW heating management by boiler control, powerful built-in 3-speed pump and diverting valve.
  • Reliable and even DHW supply with built-in DHW temperature and flow sensors.
  • Versatile On-Board Boiler Control interfaces with most external controls. Now with integrated 0-10V and OpenTherm® communication ability. Outdoor temperature sensor standard.
  • Greater Venting Flexibility with increased vent length (up to 200') and multiple venting options:
    • Horizontal or vertical sealed combustion coaxial venting (factory supplied).
    • Horizontal, vertical or hybrid sealed combustion double-pipe venting (field supplied).
    • Horizontal or vertical single-wall venting (field supplied).
  • Suitable for Altitude Levels of up to 10,000 ft. / 3000 m.
  • Easy Installation, Service and Maintenance with all pipe connections located at the bottom and serviceable components easily accessible from the front.
  • Extremely Quiet Operation; quieter than most refrigerators.
CombiPLUS Kit Specifications:
  • DHW Supply Temp: 140 Deg F
  • Continuous Draw Rate: 156 USG/h
  • Dimensions: 8.7"H x 17"W x 9.8"D
  • Weight: 25lbs
  • Min./Max. distance between boiler and CombiPlus Kit: 11.5"/36"
Please Note: Image depicts standard WB1B 26 Boiler
Hide Description
Fuel Type:

Natural Gas


Boiler Type:

High Efficiency

BTU Output:


BTU Input:




System Type:

Hydronic (Water)


Combo DHW


Direct Vent

EI/Spark Ignition

Wall Mounted

Min Pressure (W.C.):

10 W.C. (LP Gas)

4 W.C. (Nat Gas)

Max Pressure (W.C.):

14 W.C. (Nat Gas & LP Gas)

Gas Connection:


Max Pressure (PSI):


Vent Size:


Max Temp (F):


Vent Size:



Vent Type:

Viessmann Coaxial PPs Vent Stainless Steel Vent CPVC Vent

Height (Inches):


Width (Inches):


Depth (Inches):


Weight (lbs):

103 lbs


2 Year Limited on Parts/ Limited Lifetime on Pressure Vessel


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