HydroTherm expanded its popular “KN” series with the addition of two high-efficient, high-technology commercial gas-fired boilers - the KN-6 and the KN-20. Both are up to 99 percent efficient and feature Tru-Flow™, a self-adaptive design that automatically adjusts the fuel to match changes in air flow for all conditions, including temperature, altitude and air-inlet or flue-outlet blockage.

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