Smart, compact space heating and DHW

> Heat Exchanger Safety Notice for Vitodens 222-F, B2TB Series

The benefits at a glance

  • Efficiency up to 98% at full modulation and 95% AFUE. Exceeds Energy Star® efficiency requirements.
  • Space-saving design with small footprint and zero side clearance to combustibles.
  • Leveling feet for easy set-up in basement boiler rooms.
  • Low emission combustion and continuous efficiency from MatriX cylinder burner with Lambda Pro Intelligent combustion management system.
  • Wide modulation range up to 6.5:1 to precisely match load conditions.
  • Fast heat-up with innovative DHW Storage Tank Loading System comprised of plate heat exchanger, DHW loading pump and storage tank.
  • 26 gallon compact and hygienic DHW storage tank, made from titanium-stabilized stainless steel.
  • Ten-minute peak flow of 60 gallons (model B2TB-35 only) and continuous DHW draw of 3.3 GPM. Based on a temperature rise of 70 °F (50 °F to 120 °F).
  • Simplified installation with pre-installed pressure / temperature relief valves, fully enclosed heating expansion tank and circulation pump, and built-in 3-speed DHW / space heating pump with diverter valve.
  • Multiple venting options, with up to 200 feet of combined length venting (refer to install guide).
  • Vitodens 200 Series control with easy-to-use Startup Wizard.
  • Low NOx version is available. To order a Low NOx version of the Vitodens 222-F, click here to contact your Viessmann sales rep

The Vitodens 222-F is the most complete solution for residential heating and DHW, combining a highly efficient (95% AFUE) gas condensing boiler with integrated 26 Gallon titanium-stabilized stainless steel DHW storage and instantaneous performance into one floor-standing unit.

Its unique, all-in-one design offers the benefits of a boiler and standalone DHW tank, but requires only a small footprint and offers convenient installation. With rated input of 12-125 MBH and offering a 6 GPM DHW flow rate* along with effective and efficient space heating, the 222-F is ideal for most residential applications.


*6 GPM flow rate for the first 10 minutes up to 60 gallons draw, then 3.3 GPM continuous thereafter


Reliable and consistent performance

Stainless steel is the best choice for long-term reliability. That’s why the Vitodens 222-F 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.

Where can I buy a Vitodens 222?


Viessmann products are available from Viessmann authorized stocking wholesalers across the US. If you need help finding a local wholesaler, please contact a Viessmann Sales Representative via our Sales Network.


To get a quote for a new Vitodens 222-F boiler including system installation, please contact a licensed professional heating contractor near you. You can contact a Viessmann Sales Representative via our Sales Network.

Product details


Rated input
12 to 125 MBH - 3.5 to 37 kW
Efficiency (AFUE)
Natural gas, propane gas
Application range
For residential homes and apartment units, new buildings and retrofits
DHW heating
Integrated stainless steel DHW storage tank (26 USG / 100 L). Ten-minute peak flow of up to 60 gallons and continuous DHW draw of up to 3.3 GPM (model B2TB-35 only).
Limited lifetime warranty in residential applications
Additional features
Space-saving design with small footprint and zero side clearance to combustibles


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Efficiency labels for Viessmann residential boilers

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A perfect match – System technology

"The whole is greater than the sum of its parts." According to this philosophy, Viessmann does not just make individual heating equipment components that meet the high Viessmann standards for quality, reliability and effectiveness. Rather, all products are part of a matching concept, where all components complement one another. Only the perfect interaction of system integrated components draws out the maximum potential of our innovative leading technology.

Viessmann system technology includes everything you need for a reliable and economical heating system. The Vitotronic control unit with remote control, the powerful Vitocell DHW tanks for best DHW convenience, to high-quality solar thermal systems for cost-saving heating.

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