Houses need to breathe. They should draw in fresh air and exhaust stale air. In fact, some experts recommend that one half of a home’s air volume should be exchanged every hour. You can do this, of course, by opening the doors and windows. But the trick is to provide needed ventilation without sending expensive home-heating and cooling energy dollars out the window.
A house accomplishes this feat by having the proper type and combination of vents and fans in unoccupied portions of the house—such as attic and crawlspace—and by venting specific areas of the interior.
