Williams Furnace 8A141 High Altitude Conversion Kit for 1403822 110in 2 Includes 10% Buffer Gas 1200H LP UPB G9B F01 NS 2 Includes 10% Buffer Gas Type Natural Gas Liquid Propane Ignition Style Match Lit 8" H Weight BXL BXR Model: 321lb [145kg] As a result Orifices are included for the following elevations:
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