Tjernlund 950-8303 UnderAire Steel Crawl Space Vent

The UnderAire crawl space vents can be used to provide foundations with passive ventilation or can be used along with a fan-powered crawl space ventilator for maximum effectiveness. TM crawl space vents can be used to provide foundations with passive ventilation or can be used along with a fan-powered crawl space ventilator for maximum effectiveness. Fan powered crawl space ventilation quickly reduces moisture helping to protect both home and occupants. Ventilates excess moisture, the cause of mould, mildew and wood rot. Increases air circulation to fight condensation. Constant operation helps vent radon, treated wood off-gassing and odours that might otherwise migrate into living areas.