Circulation Fans or HAF (Horizontal Air Flow Fans)

Circulation fans, also often called stirrers or HAF (horizontal air flow) fans, are one of the best things you can add to a commercial greenhouse. With the fans positioned correctly, air moves well right through the greenhouse and around your plants, cutting down on hot spots and fungal disease. More air movement also improves plant transpiration and CO2 availability, which helps cool the leaves, boosts nutrient uptake and makes for healthier plants.

Winter Gardenz circulation fans are made from quality materials and use an energy-efficient, low-noise electric motor. They're designed to hang from the greenhouse structure using the suspension cables on the fan shroud.

For a fairly small outlay, circulation fans give growers a lot of benefit and value.

Circulation fans are made to keep the air moving through the whole greenhouse. Hang them above head height, roughly 3 to 10m from the gable end walls and ideally 2 to 8m from the side walls. In greenhouses over 45m long, add an extra fan in line to help move air the full length. As a rule of thumb, allow one circulation fan for every 350m2 of greenhouse.

Available in 2 sizes: 400mm or 500mm blade diameter.

Fan Brochure (PDF)