Ideal for greenhouses, livestock, swine and dairy barns, QC Supply’s DURAFAN 12" Select Speed Shutter Fan removes and controls condensation, excess heat and obnoxious fumes. Features a totally enclosed motor with built-in speed switches and a 9' cord. Includes a balanced aluminum blade, protected by a durable chrome-plated OSHA grill on the intake side. Its corrosion-resistant aluminum shutter comes complete with a tie bar to reduce shutter flapping and keep the shutters closed when the fan is not running. This fan is easy to install with no electrician required. Just mount the fan in the wall and plug it in. Cannot be controlled with a variable-speed controller Uses: Designed for livestock buildings, greenhouse, factories, warehouses, garages, attics and restaurants Removes and controls unwanted condensation Exhausts obnoxious fumes Exhausts excessive heat Improves inside air quality Features & Benefits: Totally assembled No electrician required when plugged into an approved electrical outlet Built-in speed switch with attached 9' cord Totally enclosed, maintenance-free motor Corrosion-resistant aluminum shutter with tie bar to reduce shutter flapping and opening on windy days Safety chrome grill on intake side meets OSHA standards Fan must be mounted 7' above ground level on the exhaust side Available Sizes: