
A matched intake + exhaust fan set that pulls fresh air in one end wall and pushes hot, stale air out the other. Choose Large (commercial) or Small (compact 1 ft × 1 ft, residential).
Active air exchange, end wall to end wall.
A matched intake + exhaust pair with gravity shutters — fresh air in one gable end, hot stale air out the other, sweeping the floor and keeping temperature and humidity in check.
Large — commercial-scale shutter fans for full greenhouses and Multi-Span houses.
Small — a compact 1 ft × 1 ft set for high tunnels, hoop houses, Quonsets, and backyard greenhouses.