this post was submitted on 26 Dec 2024
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Program it in increments?
My house has a lot of thermal mass. In the morning when the temperature comes up, it tends to overshoot and make the air temperature too hot after working hard to heat all that thermal mass. However I found it much more comfortable to add an increment: half an hour at a degree colder than I want. Now it can heat all that thermal mass while overheating the air is just playing into my hands
I’ve got it programmed in increments of a half a degree per hour. The thing still goes into panic mode.
Wow!
I think they might be computing the derivative of the temperature at time t in real time. When the schedule shifts to a higher set point the derivative goes to positive infinity and the system panics and calls for emergency maximum heat output.
They really ought to compute the temperature set point schedule for the whole day at once and then apply a low pass filter to that.