Fan-powered ventilator quickly reduces moisture in crawl spaces to protect home and occupants. Increases air circulation to prevent condensation, mold, mildew and wood rot. Also helps vent radon gas, treated wood gases and odors, preventing them from migrating into living areas. U.S.AAir Delivery (CFM) 110 Dimensions W x D x H (in.) 14 3/8 x 6 7/8 x 2. * Economy one-fan ventilator * 110V motor * Requires switch or dehumidistat (not included) * Multiple ventilators can be controlled by a single switch or dehumidistat * Freeze protection thermostat * Sealed bearing motor for long life * Mounts into ventilation openings in block foundations * Galvanized faceplate can be trimmed to fit
