Ideal For Diy Subfloor Air Flow Pages 1 In order to ventilate extra successfully, putting in sub ground fans will let you extract moisture and damp/stale air from the sub flooring space and substitute it with current air drawn from the surface by a variety of sub ground followers. http://rivercrgva.topbloghub.com/2025861/easy-sub-floor-ventilation-fan-strategies-the-facts