Cooling fan w/smart activation
Does anything exist that would activate a separate fan or even an intake for the HVAC unit when conditions were correct?
Mostly when the sun goes down and the temperature outside is cooler than inside and especially when it’s cooler than you would want to run air-conditioning, the fan could bring air from lower part of the house from outside and put it into either the attic or the actual house depending on the humidity. Definitely would not want to bring in a lot of humid air, especially if the air conditioning were running during the day already and had it under control. Also do not want to have to open windows and then shut them again where it could be monitored by a thermostat and Automated. I also like the aspect of getting some fresh air one it is efficient to do so.
If you had proper outdoor thermometer, indoor thermometer and humidity sensor it would seem you could automate this with some smart devices, yet I have never seen this standalone or even on a smart thermostat.
If so, please indicate what device or sensor and even what type of fan works best with it and definitely where to put it and how to configure it best.