Choosing a thermostat starts from the type of heating. Models intended for electric and underfloor heating, such as Avatto's WT410, are connected straight to a 16 ampere load, whereas a gas boiler or a water heater is controlled with a lighter 3 ampere relay. TRV thermostatic heads for a radiator system go in place of the old valve head. Note as well whether the device is controlled over Zigbee or Wi-Fi - the former needs a gateway.
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Choosing a thermostat starts from the type of heating. Models intended for electric and underfloor heating, such as Avatto's WT410, are connected straight to a 16 ampere load, whereas a gas boiler or a water heater is controlled with a lighter 3 ampere relay. TRV thermostatic heads for a radiator system go in place of the old valve head. Note as well whether the device is controlled over Zigbee or Wi-Fi - the former needs a gateway.