Designed for use in variable flow primary systems, the SwitchFire® boiler is a high-mass, fully condensing firetube boiler constructed of 316L stainless steel. The boiler is designed to handle variable flow pumping with a low waterside pressure drop and large water volume. With its dual fuel (natural gas and #2 fuel oil back-up) capabilities, as well as a variety of other fuels, the SwitchFire® is well suited for healthcare applications and other facilities requiring redundancy with alternate fuels. With its Weishaupt burner and controls, the SwitchFire offers industry-leading efficiencies and performance with both natural gas and #2 fuel oil firing.