homeassistant

The issue I'm trying to solve is to heat a room upstairs whilst not having the boiler in a constant 'on' state (the main thermostat is modulating and uses OpenTherm to communicate but that's beside the point).

A use case: say I'm going to work in my room upstairs. It's currently 18°C. The living room, where my main thermostat is, is 18°C. I have my coffee in the living room, causing my automation to recognize I'm in the living room.

I move up to my room and set my comfort temp to 20°C. The thermostat in the living room adapts to that. So does the TRV in my office. Since the setpoint of the main is higher than the measured room temp, it sends a heating request to the boiler. One of the radiators in the living room is closed, since the presence detector don't show occupation in the living room.

In this case, my office might not make it to 20°C before the living room does. The pump stops and no newly hot water gets sent to my office even though the valve is open.

Bottom line: with the current blueprint I mentioned, everything works moderately well. What I want to avoid is to have the boiler heating water if the only occupied room is already at its setpoint. What I want to achieve is more control over when the boiler should heat water (and also pump it around) so that I don't have to heat the living room when heating, say, the bedroom.

Oh and as far as the time between presence sensing and heating goes: I'm fine being a little chilly for ten minutes. Like I said, I keep every room at a minimum of 18°C to make sure it never takes too long to heat if I want it.