ES Shutter Fan Diameter:16" (3 Speed, 1200/2050/2950 CFM) and can withstand snow

and can withstand snow

The 20'x20' Semi-Gable Automated Ventilation Kit is a great value that doesn't skimp on quality

Self-tapping channel wirelock screws are needed for securing channel base to the greenhouse frame

Teflon tape

LED lifespan: 50000 Hours

ES Shutter Fan Diameter:16" (3 Speed, 1200/2050/2950 CFM) and can withstand snowThe ES Shutter Fan is a durable agriculture grade exhaust fan perfect for barn and building peaks, greenhouses, warehouses, and more. ES Shutter Fans are available without a cord, or pre wired with a cord and plug for "No Electrician Required" installation. Fans ship fully assembled out of the box so you're up and running in no time! This exhaust fan is 115V, aluminum construction, and indoor outdoor. Available in 10, 12, 16, 20, 24 and 30 Comes fully