Vernon Trollinger from texaselectricityratings.com has personal experience of crawl space vents and suggests, ‘You should completely seal up your crawl space and not use any venting at all.

Read more: Reasons Why Your Toilet May Keep Clogging The differences between encapsulating and sealing a crawl space don't ...

Crawl-space vents were designed to allow airflow under the house, in theory releasing hot and humid air to keep mold at bay ...