Hi All,
I have an need where the Whole House Fan by Brian without the thermostat meets almost all I need. I have an attic fan (not a whole house fan) and am using the code with a temp sensor outside and one in the attic. I trigger the attic fan when the attic is above a minimum temperature and the outside temperature is less than the attic temperature.
I would like to add one more bit of functionality. I would like it to trigger the fan only when 1) the attic temp is above my setpoint (app does this already) and 2) when the delta between the outside temp and attic temp is greater than a value I set.
I am missing number two. I have cases where the outside temp is 102F and the attic is 103 and it will turn on. Not much will happen here. I would like to set the minimum temperature to say 95 but only turn on if the difference between the inside and outside is say 10 degrees so the fan can actually make a difference by pulling in substantially cooler air.
Is this something someone can help me code and modify Brian’s code?
Thanks all! I am new to this and love it!