Viessmann is a leading worldwide manufacturer of HVAC and refrigeration equipment, with distribution companies in over seventy-four countries. The company was originally founded in Germany by Johann Viessmann in 1917. Four generations later, it is still a family-owned business.

Viessmann’s German-engineered products include biomass, solar thermal, oil and gas-fired boilers, and hot water heating for a range of applications, such as residential, commercial, light industrial, hospitals, schools, and government buildings.

One of Viessmann’s top priorities is environmental protection and sustainability. They build their products to be highly efficient and long-lasting, and they have a recycling program for Viessmann products that are no longer in service.

At their headquarters in Allendorf, Germany, Viessmann has instituted efficiency measures that have resulted in a 40% decrease in the amount of fossil fuel used. Additionally, 77% of the heat needed at their Allendorf site comes from environmentally friendly bio-fuels.

Viessmann’s residential product line includes domestic hot water tanks, oil and gas-fired boilers, hydronic air handlers, and solar thermal systems. These solar thermal systems can be used to help heat your hot water and even to supplement space heating. According to Viessmann, these solar heating systems can reduce a household’s carbon dioxide emissions by up to one ton per year.

Viessmann’s Vitocrossal 300, CU3A gas condensing boiler earned the Energy Star Most Efficient rating in 2016. It can achieve up to 95% AFUE and has high temperature operation up to 194 degrees Fahrenheit. It also allows for a high volume of water, which allows for longer burner run times with less cycling.

Additionally, the modulating gas burners improve efficiency and lead to cleaner combustion, with lower emissions. The Lambda Pro combustion management system controls combustion in order to maximize efficiency, while the stainless steel heat exchanger makes the Vitocrossal 300 more durable and increases the lifespan of the system.