The Efficient Home Forum

Hi. I have evohome with two zones created using existing wireless stats and relay boxes but want to add a third which is currently controlled by a mechanical stat with 2 wires controlling a separate pump ( underfloor zone). Is there a simple replacement thermostate that doesn’t require adding a relay box and power source as the location of pump and existing wiring not straightforward

I was thinking the dts4 but seems to imply needs a relay box too ?

You need a 'sensor' and an 'actuator' with evohome, so a room thermostat (DT4R) and relay box to control a single heating zone - https://thesmartthermostatshop.co.uk/pr ... -box-pack/