The Patriot 80 residential oil heating furnaces come in upflow, downflow/horizontal, rear flue, and front flue models. They are sized so they can be readily installed in such areas as utility rooms, alcoves, closets, crawl spaces, and attics. With heating capacities ranging from 58,000 to 196,000 Btuh, the furnaces have been designed to minimize operational sound. Foil-faced fiberglass insulation reduces noise and heat loss, while a high-temperature ceramic combustion chamber and harmonically balanced multispeed blower both contribute to quiet operation. With AFUE ratings of 80 percent or higher, the series utilizes fuel efficiently. Contributing to the efficiency are a powerful heat exchanger and an AFG oil burner with flame retention head, PSC motor, and solid state ignition. Multifiring rates require a simple nozzle change to adjust the firing rate; units are shipped with the largest firing rate capability.