Installer's Guide Upflow/Horizontal and Downflow/ Horizontal, Gas-Fired, Direct Vent, Variable Speed Inducer, Modulating, Condensing, Communicating Furnaces *UHM and *DHM Models (*First letter may be A or T)
Installer's Guide - Upflow/Horizontal Left/Right, Downflow Single and 2-Stage Non-Condensing Gas Fired Furnace Single Stage Models S8X1 and Two Stage Models S8X2
Installer's Guide Upflow/Horizontal and Downflow Gas-Fired, Direct/Non-Direct Vent, Single Stage/Two Stage Condensing Furnaces with High Efficiency Motor S9X1, S9X2, S9B1