Standing at only 33 inches tall, York's Latitudе line of gas furnaces were built with affordability and dependable performance in mind. The Latitude line includes the TG9S and the TG8S, both of which rely on a single-stage burner design as well as a 4-speed PSC fan motor. Both models use a tubular aluminized steel heat exchanger, although the TG9S also has a secondary heat exchanger made of a corrosion-resistant material. This series is designed to run on natural gas, although conversion to propane is an option. The Latitude line has a heating input range of 40 to 130 Mbh and can be installed in the following configurations: upflow, horizontal left or right, or downflow.
The TG9S is an Energy Star product and the more energy efficient of the two, with a 95.5 percent AFUE rating. The TG8S has an 80 percent AFUE rating. Both carry the Good Housekeeping Seal and both were designed to operate at low sound levels.
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