ESI Series 4 Wireless Programmable Room Thermostat ESRTP4RFW

Our ESRTP4RFW is a wireless programmable room thermostat which is simple to install & easy to use. The control features OpenTherm, which automatically reduces the flow temperature of your boiler helping you save up to 15% on your gas use, significantly lowering bills. The ESRTP4RFW can be upgraded to a smart control with the addition of our ESWIFIHUB (sold separately)