Temp Vents > Crawl Space Vents   Temp-Vent - S-5 - Automatic Crawl Space Vent - 2 piece unit Temp-Vent Crawl Space Vent System - Series 5 - Two piece unit construction. $ 32.95               More Information Temp-Vent - S-6 - Automatic Crawl Space Vent Automatic Temp-Vent is a revolutionary type of foundation ventilator for the crawl space under a home - it opens and closes by itself. $ 25.95               More Information