Tjernlund 9 in. x 5 in. x 4 in. UnderAire Adjustable Dehumidistat Vent Controller

Dehumidistat installed in metal junction box hardwires in series with power lead of V1 Crawl Space Fan. Turns units on as humidity rises above level set on dial. Turns units off once humidity falls again. Has On and Off mode to allow for manual operation. Easy wiring, durable steel construction. Also works great with humidifiers.