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PT: Honeywell ST699 thermostat upgrade..

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PT: Honeywell ST699 thermostat upgrade..

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rob4465

PT: Honeywell ST699 thermostat upgrade..

I have a fairly old Honeywell ST699 thermostat that controls the central heating and hot water on a Worcester boiler. It is in an old farmhouse which has an airing cupboard with a hot water tank. There is also a separate thermostat located near the top of the stairwell.

I'd like to upgrade it to a wireless thermostat if possible and was wondering if anyone has replaced this model. I have fitted a Nest unit before, however this was on a combi boiler and I'm not sure how straight forward replacing this unit is going to be.

Any advice greatly appreciated.
Rob

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