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These wireless TRV’s are used on a number of Honeywell systems such as Hometronic. The System controller tells the HR80 what temp at what time and the HR80 manages the demand to the boiler controller accordingly. I’m looking to control a large domestic system that covers 8 ground floor rooms...

I am interested to find out more about how the SEDBUK rating is achieved/awarded. Things like : 1/. How long is the test period and what does it involve: I gather the 46kw Vaillant Ecotec + HE boiler always has a full burn for the first hour of firing, so how does it achieve a 90.5%...