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F8AUH Gas Furnaces – Up-Flow / Horizontal 45,000 to 120,000 Btuh (13.2 to 35.2 kW) Heating Capacity 1 through 5 Tons (3.5 to 17.6 kW) Add-On Cooling User’s Information Manual RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE Table of Contents Model Number Identification –24...