pewoaoa 720 cfm crawlspace vent fan, with thermostat,humidistat, for moisture reduction, radon mitigation, freeze protection, ideal for basement, attic, crawl space fan vent(air out) 3-year warranty 720 silver is up for auction in Tools & Home Improvement. The current bid is $1.00, 99% below the $168.00 MSRP, in As Is condition. Bid on this item at our Rogers - N Dixieland Rd. location before the auction closes.