J&D Manufacturing Twister Exhaust Fan, 20 Inch

J&D Manufacturing's Twister Exhaust Fan has been a trusted barn and greenhouse ventilation staple for over 20 years. Built with a heavy-gauge galvanized steel housing and a direct-drive motor, the Twister delivers dependable, low-maintenance airflow in demanding agricultural, greenhouse, and industrial environments. Available in 12", 16", 20", and 24", each unit ships fully assembled - just cut your rough opening, mount, and wire. The 18-gauge galvanized butterfly shutters open effortlessly at startup and spring shut when the fan is off, creating a tight, draft-free seal against debris, moisture, and pests.

Features & Benefits

• Galvanized Butterfly Shutters: 18-gauge galvanized shutters with adjustable positive draft-free closure open automatically at startup and seal tight when off, blocking debris, moisture, and pests.
• Direct-Drive Motor: No belts or pulleys means fewer wear points and lower maintenance requirements over the life of the fan.
• Hinged Rear Guard: Remove just two bolts and swing out the entire fan assembly for fast, easy cleaning and maintenance access.
• Balanced Aluminum Prop with Zinc-Plated Hub: Precision-balanced for smooth, vibration-free operation and long bearing life.
• Variable Speed Compatible: Most models support variable speed control for precise airflow management across seasons.
• Fully Assembled: Ships ready to install - cut the rough opening, attach to the structure, and wire. No additional assembly required.
• Optional Weather Hood: Galvanized weather hood available to protect the fan from harsh weather and severe wind-driven rain.
• Broad Application Range: Ideal for dairy, poultry, greenhouse, industrial facilities, garages, workshops, and farms.

Technical Specifications