Comfort 80 Oil-fired Furnace Maximize Your Heating Options   Energy efficient — up to 80.5% AFUE. Multi-speed blower evenly distributes heat. Low constant fan switch helps prevent drafts. Sealed combustion design reduces burner sound. 20-year limited warranty on heat exchanger. Five-year limited parts warranty.   Benefits - Built by the most trusted name in the industry, Carrier furnaces heat safely within your home. Download Brochure Features - Carrier pioneered several safety innovations over a decade before they became an industry requirement, such as 100% combustion and heat exchanger pressure test, while the control board constantly monitors the safety devices during the heating operation.         An Inside view of the Comfort 80     Stainless steel primary heat exchanger – direct fired without the ceramic pre-combustion changer used in most other oil furnaces eliminates the maintenance associated with the ceramic chamber and allows every furnace to be 100% fire-tested at the factory. A ceramic pre-chambered furnace cannot be tested this way at the factory. Aluminized steel secondary heat exchanger – is tightly welded for added durability. High-performance Beckett burner – provides quiet operation and optimal fuel efficiency. Ignition controls – reliably start the heating and combustion process for top-quality, reliable performance. Flue silencer baffle – helps reduce combustion noise at the source. Fully insulated walls – help reduce heat loss while helping to transfer maximum heat to your living spaces. Barometric draft control – assists in the proper venting of the furnace.       Specifications