Viessmann Boilers 
Review and Buying Tips

Review of the Viessmann boilers for space and residential water heating. Explore the wall-mounted and floor-standing models with the condensing technology for high energy savings and reduced gas emission.

Viessmann is the German manufacturer of heating equipment, established in 1917. Today, the company has over one dozen factories on three continents, including North America (one factory is in Canada).

Models and types of Viessmann boilers

Vitodens 200

There are three groups of gas-powered boilers made by Viessmann and sold in the US and Canada, all using condensing technology for space and domestic water heating.

Two types are wall-mounted, and one is floor standing, all designed with zero clearance to combustibles, sealed combustion, and flexible venting, where pipes can run up to 200 feet (some models).

The boiler’s high energy efficiency of over 90%, in some cases 98%, makes condensing technology one of the most economical and cleanest for water heating while contributing greatly to environmental protection.

The wall-mounted boilers come from the 100-W and 200-W series, where 100-W models are designed for space heating with an option to add the domestic how water (DHW) kit for heating potable water. In contrast, the 200-W models already include the DHW heat exchanger and circulating pump.

The floor-standing models from the 222-W series are designed mainly for space heating, while the add-on DHW kit installs as a separate element and connects to the main heater.

The stand-alone boilers are also condensing units but are much bigger than boilers from the other two groups, plus these boilers utilize the enclosed water storage tank and expansion tank.

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Top features

Viessmann boilers have many quality elements and features that help in better fuel economy, cleaner energy, and better comfort for the users. With the power range from as low as 3.5 kW to the maximum of 155 kW and water flow rate from 6.2 GPM to 38 GPM, Viessmann boilers are equally recommended for residential and commercial applications.

One of the essential elements of the Viessmann gas boilers is the Inox-Radial heat exchanger made of stainless steel for protection against corrosion, durable and reliable work.

The company guarantees the element for ten years against leaks. The heat exchanger allows every boiler to operate at very low water temperatures and temperatures of exhaust gases and provides extremely high energy efficiency.

Other exclusive Viessmann’s features are the modulating MatriX cylinder gas burner and powered fan with variable speed, all working to provide ultra-efficient heating with the reduced gas emission and extremely quiet operation. Many other elements offer significant benefits to its users, such as the high altitude operation of up to 10,000 feet, no fuel conversion kit required, multi-unit operation, integrated control unit, outdoor reset function, many safety elements, and more. For more details, check the model reviews.