Bought new but never fitted. Box a little battered from storage but Thermostat and booklets are still in original cellophane wrapping and in perfect condition. The Honeywell T4H110A1021 T4 7 Day Programmable Wired Thermostat is powered by AA batteries and has a 2-wire wire configuration. This programmable thermostat is designed for use with both combi-boilers and gas boilers.
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