Tempstar® SmartComfort® DLX80
80% AFUE Furnace


Direct hot surface ignition system features an advanced silicon nitride igniter and in-shot burners for greater reliability.


Temperature limit control, reliable gas valve and induced draft motor all help ensure safe operation.


Solid pre-painted steel insulated cabinet with tight-fit door latch system, blower motor isolated behind a sealed door, and soft-mount rubber gaskets on key components lower operating sounds.


Two-stage redundant gas valve and two-speed induced draft blower adjust to the higher or lower settings when more or less heat is needed, then heated air is delivered by a PSC blower. The IIS 80 is also compatible with two-stage cooling, and its advanced dehumidification capability can reduce additional moisture in the air when you add a humidity-sensing thermostat to your system.

System Control

State-of-the-art electronic controls monitor system operation and allow for faster, easier system diagnostics.

  • Energy-saving high efficiency operation of 80% AFUE.
  • Two-Stage System reduces temperature and humidity swings in the home by heating and cooling more evenly.
  • 5-year no hassle replacement limited warranty gives you a replacement unit if the heat exchanger should fail within the first five years.
  • 20-year limited warranty on the heat exchanger.
  • 10-year limited warranty on all functional parts.
  • 97 AFU Model
  • 96 AFU Model
  • 80 AFU Model
80 AFU Model