Adding a Tjernlund V2D ventilates your space to keep air fresh. Indoor air quality starts in your crawlspace, and musty, saturated air damages your home and health. Tjernlund UnderAire V2D Crawl Space Ventilator.
It maintains your ideal humidity level on a wall-mounted control panel..Made in America, the reversible V2D ventilation fan can both exhaust damp air out of your basement and bring in fresh air at the same time.