According to Honeywell, the FocusPRO thermostat is built to provide precise comfort control (±1 degree F) and features a large, backlit digital display that shows both room temperature and set temperature. The batteries are contained in a flip-out door on the side of the thermostat, eliminating the need to remove the unit from the wall when replacing batteries, the company says.
The thermostat can be installed in a range of heating and cooling applications including forced warm air, heat pumps, hot water, 750-millivolt, steam, and gravity systems. It can be configured for 1 heat/1 cool, heat only, and cool only applications. It also is compatible with normally closed, normally open and Series 20 hot water zone valves, says the company.