We carry numerous replacement parts for the US Stove 1600EF Exterior Furnace. This furnace is designed to use in conjunction with your existing HVAC ductwork and works with your existing furnace while leaving the mess outside. With up to 180,000 BTUs, it is designed to heat a home up to 3,000 sq. ft. This unit has an all weather steel shell that is over lapped for a tighter weather seal. If you can not find what you are looking for please call, e-mail or fill out our Parts Request Form and we will be happy to assist you.