This 33in.H gas furnace is designed for installation in up-flow, down-flow, and horizontal applications. The single-stage, Energy Star Rated, high-efficiency furnace ships natural gas ready and can be easily converted to use propane gas with the optional LP347 conversion kit, Item# 172900. U.S.A. Requires 1/2in. input to gas valve, dedicated circuit breaker, and 120V wiring with proper polarity and ground. Input: 120,000 BTU Output: 114,000 BTU Classified for Category IV venting May be vented either through a side wall or roof using approved plastic Electronic hot surface igniter for increased safety and efficiency Adjustable-speed, maintenance-free direct drive blower that never needs lubrication Self-diagnostic control module to monitor operation Tubular aluminized steel heat exchanger Stainless steel secondary heat exchanger Comes factory assembled, wired and tested to assure safe, dependable and economic installation and operation 17 1/2in.W x 29 1/2in.D x 33in.H