Does an Oil Furnace Need a Chimney Liner?
An oil furnace needs a chimney liner. The purpose of any chimney liner, or flue, is to keep the smoke, fumes and toxic gases from penetrating the chimney mortar and entering the living space. The fuel used in an oil furnace creates an oil mist. If this by-product is not correctly vented, the substance will build up on surfaces around the home; the process is called “puff-back.” Cleaning up the mist can be costly. Also, a chimney liner protects the framing and walls of the structure from extreme heat and prevents fire.
