Good morning,
I thought I'd ask here before opening a case with Honeywell just in case I've missed something obvious.
I have a room which appears to take a long time to heat up. I suspect I have an issue with undersized radiators, very odd thermal characteristics in the room, being at the end of a very long 15mm pipe run, etc. But setting that all aside, the radiators *can* get the room warm if given enough time. However, Evohome doesn't appear to be starting the heat-up cycle early enough and so misses its target (by an hour or more) every single day.
Here's a graph showing what I mean. Be aware that the times shown are in GMT.
evohome-optimisation.jpg
The room is meant to be at 21C at 9am (which is 8am GMT on the graph). You can see that it's taken an hour and a half to raise the temperature by 0.8C (from 20.2C to 21C) and it pretty much hit the target exactly an hour late. I recognise that this is *very* slow, but again, it's a function of a strangely shaped space with odd thermal characteristics, couple with some other bits and bobs, plus the fact that I'm using a wall stat to measure the temperature, not the HR92s, so there's always some lag.
So my question is, given that I have optimum start set to (up to) 3 hours, why isn't Evohome starting this room a hour earlier so it hits the 9am target?
I thought I'd ask here before opening a case with Honeywell just in case I've missed something obvious.
I have a room which appears to take a long time to heat up. I suspect I have an issue with undersized radiators, very odd thermal characteristics in the room, being at the end of a very long 15mm pipe run, etc. But setting that all aside, the radiators *can* get the room warm if given enough time. However, Evohome doesn't appear to be starting the heat-up cycle early enough and so misses its target (by an hour or more) every single day.
Here's a graph showing what I mean. Be aware that the times shown are in GMT.
evohome-optimisation.jpg
The room is meant to be at 21C at 9am (which is 8am GMT on the graph). You can see that it's taken an hour and a half to raise the temperature by 0.8C (from 20.2C to 21C) and it pretty much hit the target exactly an hour late. I recognise that this is *very* slow, but again, it's a function of a strangely shaped space with odd thermal characteristics, couple with some other bits and bobs, plus the fact that I'm using a wall stat to measure the temperature, not the HR92s, so there's always some lag.
So my question is, given that I have optimum start set to (up to) 3 hours, why isn't Evohome starting this room a hour earlier so it hits the 9am target?
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