Compatible with the following heating/cooling systems:

Heat pump (No aux or emergency heat)

Heat pump (with Aux or Emergency Heat)

Standard Heat and Cooling Systems

Two Stage Heat and one stage cool

Standard Heat only systems

Millivolt Heat Only Systems

Standard Central Air Conditioning

Gas or Oil Heat

Electric Furnace

Hydronic (Hot Water) Zone Heat - 2 wires

Multiple Features including a bigger brighter backlight, front load battery, and fully adjustable temperature differential.

Many more features