"Ideal for residential or commercial operation, the W9V series 96 efficiency multi-positional gas furnace is a 33' tall cabinet designed for use in upflow, downflow and horizontal applications. Two-stage, Energy Star-rated. Natural gas ready, easily converted to propane gas with the optional LP 347 conversion kit Item# 172900. Factory shipped for upflow installation-ready, easily converted for downflow and horizontal applications. This furnace is Category IV listed and may be vented through a side wall or roof using approved plastic combustion air and vent piping. U.S.A. Blower Power Supply Volts, Amps 120, Dimensions W x D x H in. 17 1/2 x 29 1/2 x 33, Blower Included Yes, Igniter Hot surface igniter, Oxygen Depletion Sensor No, Thermostat Included No, BTU Output 58,000, Blower CFM 1,200, Needs Direct Venting Yes, Gas Inlet in. 1/2. Electronic hot surface igniter increases safety and efficiency Two-stage gas valve Two-stage inducer operation Variable-speed ECM blower operation Self-diagnostic control module monitors operation The primary heat exchanger is made of tubular aluminized steel, while the secondary is made of stainless steel"