Most mornings the inside temp of my house is around 80 and the outside is about 68. Starting at 4am when I get up, I'm opening every window in the house and I can drop the temperature a few degree's, but only a few, may get it to around 78 if I'm lucky, so I started looking at whole house fans to give the hot inside air an added impetus to leave allowing the nice cool air in.
Looking at what's on offer there seems to be the box fan on it's side type
and the blower motor connected by ducting to a vent in the ceiling type.
I'm leaning towards the second one but rather than cutting another hole in my ceiling I was wondering about adding a junction duct to the outlet of my attic furnace and pulling the air out of the existing feed and return vents. I would of course add insulation and motorized gates so it only operates when there is a temperature difference (Arduino). May even help pull some of the dust out of the ductwork
Any input on overlooked potential disasters?