Two Stage 80% AFUE Furnace

Two Stage 80% AFUE Furnace

Two Stage IIS 80 Furnace

Tempstar® SmartComfort™ IIS 80 Two-Stage Gas Furnace

TempStar Observer 80% AFUE Furnace

10 Year Limited Parts Warranty

20 Year Warranty on Heat Exchanger

Rated 80% AFUE

5 Year Limited Warranty on Furnace

Multiple Stages For Maximum Comfort

You may wonder why your furnace turns on and off frequently, causing uncomfortable temperature swings. That’s caused by the quick heat-up and shut-down cycle of a single-stage system. In the two-stage system, the furnace automatically adjusts to the temperature—normally operating at a quieter, primary stage and adjusting to full capacity to boost heat as temperatures drop. The integrated control system adjusts the flow of gas and combustion fan to each stage. Tempstar® Heating and Cooling Products also builds every unit for minimal operating noise with features ranging from a sturdy steel cabinet that is thermal lined and insulated to a sealed blower compartment and soft-mount components.

Peace Of Mind Warranty Protection

Every Tempstar unit is backed by exceptional warranties, including our No Hassle Replacement™ limited warranty*, which gives you a replacement unit if the heat exchanger should fail within the first five years. You also get up to a 10 year parts limited warranty* and a 20 year limited warranty on the heat exchanger. And don’t forget to ask us about HELP extended service agreements for additional worry-free protection.

The Heart Of The System: The Heat Exchanger

The proven RPJ® (Rigid Press Joint) heat exchanger is designed to force more heat to the outside surface for higher efficiencies, and it’s constructed of tough corrosion resistant aluminized steel. The weld-free interlocking clamshell design reduces cracking or separating over the life of the gas furnace. And you can count on energy savings with an 80% AFUE rating.

  • Request a Furnace Quote

Tempstar IIS 80 Brochure

Download the Brochure