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ESI ES2247B 2 Chanel Programmer     ● Two zone control, heating or hot water    ● Large, easy to read LCD with blue back light    ● 7 day, 5/2 or 2...

ESI ESRTERFW Electronic Digital Room Thermostat RF With TPI    ● TPI Technology to stop unnecessary use of gas saving money for homeowners   ● Elec...

ESI ESRTM Mechanical Room Thermostat    ● Large, clear adjustable dial with familiar feel   ● Easy fit back plate   ● 3-year warranty for complete ...

ESI ESRTP4RFW Programmable Room Thermostat RF With Opentherm Easy to install wireless control Simple to upgrade to smart control with the addition...

ESI ESRTP8W-G Mistral WiFi Wireless Grey Programmable Room Thermostat  2 Channel – can be used for heat only or heating & hot water Boiler or ...

ESI ESRTP8W-W Mistral WiFi Wireless White Programmable Room Thermostat 2 Channel – can be used for heat only or heating & hot water Boiler or ...

ESI ESZV222LM 2 Port 22mm Zone Valve    ● A direct replacement for other popular models   ● Quick release actuator head for easy of service and rep...

ESI ESZV223LM 3 Port 22mm Mid Position Valve    ● A direct replacement for some other popular models   ● Quick release actuator head for easy of se...

ESI ESZVA2LM Replacement 2 Port Actuator     ● A direct replacement for some other popular models   ● Supplied with two screws to allow the heads t...