As of 2015, HVAC Parts Outlet and USA Supply sell aftermarket furnace parts online. PROSTOCK sells aftermarket furnace parts at over 200 North American store locations.
HVAC Parts Outlet has convenient category listing to help users find the parts they need. Most parts ship the day they are ordered, and HVAC Parts Outlet sells only new, non-refurbished parts for all major brands.
USA Supply is located in Chicago, Illinois, and has over 6,000 square feet of furnace and boiler parts for sale and ready for shipment. USA Supply stocks parts for most major brand furnaces and offers 24-hour telephone support.
PROSTOCK stores sell replacement parts for Rheem and Ruud Distributors. The stores stock PROTECH and other brand name furnace parts.