Sale! DetailsOut Of Stock Solar Roof Fan $169.00 $150.00 Size: N/Aor 4 payments of $37.50 with Afterpay Currently out of stock – new stock arriving March 2018 (available on back order) Solar Roof Fan Sproutwell’s Solar Roof Ventilation Fan is the perfect accessory for helping to cool your greenhouse while providing the necessary ventilation to help your plants grow. Requires full unobstructed sun to run the fan, can be turned off by turning the thermostat to off. The fan will not run when there is no sun light. PLEASE NOTE: Qty 1 solar vent will service up to approx 10sqm (3m x 3.4m greenhouse). You can add multiple units if you area is larger.