I own a middle unit townhouse. The only vent in the roof as far as I can tell is a ridge vent. I am thinking of installing a whole house fan in my attic floor to help better distribute cooler air through the house since the attic and second floor are very warm. Would a whole house fan work well with a ridge vent, or should I look into getting the roof vented in another way if possible? The manufacturer said for the fan unit I want, I need to make sure I have 2 1/2 square feet of net free venting. My townhouse is 18 feet wide, and I’m pretty sure the ridge vent goes across the full width of the house.