Residential *-Stage or Single stage Natural Gas Furnace. Multi
speeds, Convenient left or right connection for gas and electric
service. Desined for multi-position installation: upflow,
horizontal left or right. Fully insulated, heavy-guage steel
cabinet with durable baked-enamel finish. Silicon Nitride igniter.
Patented TuffTube(tm) dual-diameter tublar heat exchanger. Self
adjusting feature automatically adjusts furnace to high or low
stage based on outside temperature without outdoor temperature
sensor. **-year parts warranty Model# above is *0, **0 BTU
inquire about other models from *5, **0 to **0, **0 Btu. MADE IN
USA