A Slant/Fin boiler can refer to residential or commercial boilers that are produced and sold by Slant/Fin. As of 2015, the residential and commercial boiler units offered by Slant/Fin can be powered by either gas, oil or electricity.
Slant/Fin also offers a range of seven high-efficiency boiler models that has an AFUE rating ranging from 86.5 to 96.1 percent. Of the seven models, five can be powered by gas and can be set to generate heat through modulation, condensation or sealed combustion. The Jaguar J-390 Boiler by Slant/Fin also serves a dual function, as multiple units of this product can be connected for commercial use.