Maximum Input BTU The maximum amount of heat that the unit can produce. The amount delivered into the space will be the input minus the efficiency loss also know as the output. For example a 100000 btu furnace at 80% efficiency will give you 80000 out btus of heat. The same size furnace at 95% will give you 95000 btus of heat.	150000 BTU

Minimum Input BTU The amount of heat produced by the unit at the lower stage of heat. Having two stages of heat will allow for more consistent operation and greater comfort in the home.	19000 BTU

Hot Water Capacity Range Learn More The gallons per minute of hot water that the unit is rated to provide. The actual amount of hot water generated can vary depending on your ground water temperature.	0.6 - 5.3 GPM

Tax Credit Learn More This product may qualify for an energy efficiency tax credit.	No

Thermal Efficiency The percentage of the heat generated by combustion that goes into heating. The remaining percentage goes out the flue. The higher the efficiency rating, the lower the cost of operation.	80 %

Fuel Type	Natural Gas

Energy Factor	0.78

Temperature Range The minimum and maximum temperatures on the thermostat.	140 - 98 °F

Weight	34 lbs

Width	14 Inches

Depth	8 Inches

Height	22 Inches

Heat Exchanger Warranty	10 Years

Parts Warranty	5 Years