Get comfortable while you save energy with this Tekmar net Thermostat. This communicating thermostat is designed to operate either a) a hydronic radiant floor with a 2 stage heat pump (water-to-air or air-to-air) for heating and cooling and an emergency backup heating system; or b) 2 stages of heating and 2 stages of cooling. There are 3 auxiliary sensor inputs that can measure room， floor， outdoor， or duct temperature. The optional floor sensor allows precise heating of radiant floors. Relative humidity level can be measured and controlled using either the built-in or external humidity sensor. The large touchscreen display allows you to easily adjust 7-day programmable schedules and room temperatures to optimize comfort and energy savings. The 557 can connect to tekmar net controls using 2 or 4 wires or it can be installed as a stand-alone device.

Programmable schedule

Away scene key

3 auxiliary sensor inputs tekmar net communication compatible touchscreen technology outdoor and floor temperature display

Freeze protection

Heat/cool priority

Can connect to tekmarNet controls using two or four wires or it can be installed as a stand-alone device