While looking at the Ecobee 3 I noticed a nice feature that keeps the fan for the HVAC running for a certain amount of time after the cooling cycle or heating cycle is done and the coils are still cold or warm.
My thermostat CT30 only has automatic and always on fan settings. Automatic turns off as soon as the AC or heater goes idle so I don’t like an app that will put it into Always On mode for maybe 20 minutes to get the rest of that “free” cooling or heating by simply blowing the fan. Then it would cycle the fan to automatic mode which would, in effect, turn it off because the AC or Heat would not be actively running.
Does this exist or would someone be interested in making an app like this?