Tjernlund Crawl Space Fans
UnderAire fans help to effective control odor problem caused by mold, mildew and rot wood in crawl spaces with high humidity levels. Available in models with one (110 cfm) or two (220 cfm capacity) fans for exhaust and intake (supply) applications. V1D and V2D models come with an adjustable dehumidistat. 120V standard on all models.