Help Protect Foundations with Temp Vent. The foundation is critical to the integrity of the home. That's why foundation ventilation is critical. Unventilated foundations are subject to built-up moisture that can eventually lead to costly damage. Temp-Vent foundation vent systems help protect this critical area of the home. What's more, ventilation can help control conditions that lead to mold, mildew, fungi, damp rot and unhealthy air. But there's more. If there's one thinq termites are attracted to, it's warm, moist, dead air environments such as those found under houses in crawl spaces or unfinished basements. Temp- Vent foundation vents are designed to provide ventilation that can reduce moisture in these areas, which helps control termites. Temp-Vent foundation vents help control moisture build-up and termites in crawl spaces and are available through pest control distributors.