Hot Air Furnaces
Modern heating oil furnaces range in efficiency from 81 percent to 95 percent. Today's furnaces include innovations like low-mass combustion chambers and sophisticated heat exchangers, which together improve heat transfer; solid-state or microprocessor-based controls, which result in more reliable operation; and high-pressure flame retention burners, which result in clean, efficient comfort. In addition to heat, a furnace's ductwork can be used for central air conditioning, whole house humidification/dehumidification and air cleaning.