Where I’m at, the temps flip-flop day to day, even hour to hour. In the morning it’s 35° outside, and by evening it’s 79°. I gave up keeping up with the temps and shut my unit off for the time being.
My question is why can’t HVAC units be programmed to say that if the outside temp reaches n° and the inside temp reaches m° cold, turn on the heat; conversely, if the outside temp rises to n° and the inside temp reaches m°, then turn on the AC?
My thermostat already knows the outside and inside temp, but I still have to manually switch it back and forth. I want a system that I can just set it and forget it all year round.
You don’t need to go to that level of complication.
Two sensors in combination, one that detects current heat input one that detects absorbed heat. These modules would be placed about the outer walls.
Then calculate how much heat is going to radiate into the building the rest of the day.
And it can compensate.
We don’t need to be more than a fraction of a degree off and a system like that would be amply accurate.
What kind of sensor do you suggest for measuring that? I’m genuinely curious why they are not industry standard.
My guess is price and/or robustness. The RTCs we use are cheap and durable.