Add a solar attic fan. By using solar power ... is needed for every 300 square feet of attic. That said, if the house does not have a vapor barrier, it may benefit from more.
‘Another popular fan is known as the whole house fan,’ he continues. ‘These are for cooling the house and attic. These work by pulling air from the outside through the home and exhaust into the attic.
Q: I live in a two-story, single-family home with an unfinished attic above the second story ... Some have electric vent fans, and one house has a fan powered by solar cells.