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 plus a patented draft safety switch that shuts off the furnace if a vent blockage is detected.
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.
State-of-the-art electronic controls monitor system operation and allow for faster, easier system diagnostics.