Schaefer SFT-2000A 20" Shutter-Style Exhaust Fan, great for greenhouses . Low-maintenance, energy-efficient solution for low to medium airflow. Features an aluminum blade, powder-coated guards, durable aluminum shutters and an enclosed heavy-duty motor. Hardwired electrical connection required. Mounts flush to exterior wall.

Features and Specs:

• Speed: RPM 14
• Air Delivery: CFM 3,122
• Volts: 115/230
• H/P: 1/3
• Amps: 3.8/1.9
• Dimensions: L x W x H 12 ⅜" x 22 ¾" x 22 ¾"
• Made in United States