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hugo7
stevo_com
Not sure about battery life (touted as two years with standard AAs - there are workarounds to allow you to use rechargeables) but until the windows are replaced next month, it's not a fair test as no sooner do they get the room up to temp, all the celciusses fly out through the merde fenetres and they have to kick into gear again so will likely be using more power at the minute. There is a whirr from the actuator when the TRVs go on and off, but it's not loud enough to wake you or prevent sleep. So I'd say it's not a problem unless you are super sensitive to that kind of thing.