I recently installed airscape whole house fans in my home. I need about 4 more square feet of net free vent area in my attic to accommodate the air being forced into the attic by the fans. I have some soffit vents around the front and back of the house, and 8 mushroom vents near the peak of the roof. To add more net free vent area, should I install more of the same, or add a ridge vent, or something else? Again, it's to accommodate the air being forced into the attic by whole house fans. When the fans are not in use, the existing vents work fine.