"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. Oxygen Depletion Sensor No, Blower CFM 1,200, Needs Direct Venting Yes, Igniter Hot surface igniter, Blower Included Yes, Blower Power Supply Volts, Amps 120, Thermostat Included No, BTU Output 58,000, Dimensions W x D x H in. 17 1/2 x 29 1/2 x 33, 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"