The Efficient Home Forum

This describes exactly what I've seen my Evohome system doing. During a very cold January the boiler would start up and open the hot water valve for 30 minutes or so, bringing the tank up to maybe 25C or thereabouts, well below its set point. Now that the temperature is well above zero this ...

For the last few weeks (January / Feb 2021) the BDR91 which controls the hot water valve in my simple S plan system has decided to switch itself on for about half an hour every morning, just after I get up and the heating has started to warm up the house. This is a new trick it has learned. The ...