The Honeywell CT31A1003/E heat and cool non-programmable thermostat is a non-programmable option that features low voltage controls and a convenient snap-action switch that allows users to adjust freely between heating and cooling systems. Incredibly easy to install and compatible with a host of heating and cooling systems, this unit doesn't require leveling and comes equipped with an intuitive fan control that allows you to customize your fan's operation. Whether you choose to have it run automatically with the system or set it on constant, you'll have options. Mercury-free, this product comes equipped with mounting hardware and a wall plate that make the process of installation even more convenient.