Ducane (HVAC) RLHF-R80C is a heavy-duty oil furnace with a long lasting ceramic fiber combustion chamber and easy access large diameter clean out ports in heat exchanger. The unit has a foil-faced high density fiberglass insulation in cabinet which reduces heat loss and sound, and a pre-painted steel cabinet for maximum durability. It also features a slide-out blower design for ease of cleaning and service, and a multi-speed direct drive blower assembly that allows the airflow to be matched to the application requirements.