2 Stage Heat, 2 Stage Cool Heat Pump & Gas Compatible The thermostats are designed to operate with most gas, oil, electric boiler or 2-wire hot water heating, and air conditioning systems that have 24-volt or millivolt control AC 24V with battery backup System Cool/Heat/Off Modes & Fan On or Auto Selectable 12/24 hours clock, Adjustable Cycle Rate, Large easy-to-read LCD display with green backlight, Compressor short-cycle protection, High/low temperature protection, Selectable dead band setting, Low Battery and Filter change indicators

The TempĕSure TESD22 2H/2C Thermostats have a luxurious appearance with large LCD back lit display. The thermostats are designed to operate with most gas, oil, electric boiler or 2-wire hot water heating, and air conditioning, and heatpump systems that have 24V or millivolt control