BioTherm, Inc. products

Sealed combustion boilers use fans and ducted air vents which improve the performance of a Low Mass Boiler. They also provide low NOx for emission requirements. Generally, these units also ship with upgraded ignition systems that allow for staged thermal performance for different seasonal loads. The reason this technology was developed was to meet the newer anti-smog regulations, which were largely driven by NOx emission. These systems burn the fuel more thoroughly and release less smog. BioTherm offers three closed combustion boiler models: HiDelta, Delta Limited, and MVB.

Adding a system to squeeze the heat out of escaping exhaust gases greatly improves the efficiencies of the boiler, up to 99% under a steady state load. Condensing units cool exhaust gases and capture water vapor before the gases exit the boilers. That extra heat is then captured and put to work instead of wasted as exhaust heat.