Baxi/Potterton/other boiler makes (check compatability with your boiler manufacturer) Ecoblue QAC34/149 Wired Outdoor Weather sensor IMPROVES BOILER EFFICIENCY Install outside and wire this into your boiler circuitry appropriately and you could benefit from much improved boiler efficiency as the boiler control circuitry will then know what the external temperature is and adjust its output to suit the conditions most effectively and efficiently. See your boiler installation manual for instructions.
