PCV1 Powered Crawlspace Vent Powered Crawlspace Vent (Model PCV1) creates a powered ventilation system for crawlspaces that can be utilized in both old and new construction. The PCV1 crawlspace fan is designed to be mounted behind any new or existing crawlspace vent. Its operation is controlled with a temperature switch /humidistat control which activates the motor at or above 50?F and is user adjustable for the varying levels of relative humidity in your crawl space.
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