Quote:
Originally Posted by monkeyman
you're asking a lot of a simple home thermostat. does such a thermostat even exist, does such a house? to be able to measure that kind of information, accounting for variables before they change is way too much to ask in my opinion. its not your thing, i get it. i don't need, nor expect it to do the things you apparently do.
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It's not really that hard. All you need to do is correlate the rate of temperature increase with the house temperature, outdoor temperature, and furnace power level. You can do this with thermodynamic models, or you can do this treating using a black box model. Given that the thing is connected to the internet, it can easily find the outdoor temperature. It controls the furnace power level. It measures the house temperature. So it could easily do it.
Does such a thermostat exist? Absolutely, there are feedforward controllers for temperature (of course, it would also incorporate feedback control). Does it exist for consumers? Probably not, but that's what I'd want a premium thermostat to do, rather than start warming your house at the time when you want it to have reached that warmer temperature. The NEST has all the hardware it needs to be this device, the only reason it doesn't do this is that the people who designed its software/firmware weren't smart enough to do so.