The 1602R add on furnace is designed to use in conjunction with your existing HVAC ductwork and work seamlessly with your existing furnace. With twin 800 CFM blowers and up to 180,000btu’s it is designed to heat a home up to 3000 sq. ft. This unit is made with a firebrick lined plate steel firebox surrounded by brilliant red painted steel giving the unit an eye appealing look. Connection to your existing ductwork is easy with the 13” x 18” heat outlet. Available accessories include the Universal filter box Kit and Hot Water Coil kit.