J&D Manufacturing Direct Drive Storm Exhaust Fan, 55" - 31,370 CFM (Aluminum Shutter, Three Phase, 208-230V with Cone)

The J&D Manufacturing Direct Drive Storm 55" Exhaust Fan brings next-generation motor technology to high-volume barn and greenhouse ventilation. Built around a totally enclosed, IP65-rated permanent magnet direct-drive motor with an onboard variable speed driver, this fan delivers precise, infinitely variable airflow control without a VFD - simplifying installation and eliminating the cost and complexity of external drives. With no belts, pulleys, bearings, tensioners, or greasing required, the Direct Drive Storm is essentially maintenance-free, while soft-start functionality and surge protection extend fan life in demanding agricultural and industrial environments. Available in single-phase (230V) and three-phase (208-230V or 460V) configurations with aluminum or poly shutter options.

Features & Benefits

• Permanent Magnet Direct-Drive Motor - No VFD Needed: Variable speed control is built in via an onboard driver, eliminating the need for an external Variable Frequency Drive and simplifying installation and wiring.
• Totally Enclosed IP65-Rated Motor: Fully sealed against dust and moisture ingress, the high-efficiency PM motor runs cooler than conventional motors, extending longevity and reducing failure risk in humid agricultural environments.
• Zero Maintenance Design: No belts, pulleys, bearings, tensioners, or grease points - dramatically reduces scheduled maintenance and unplanned downtime over the life of the fan.
• Soft Start: Gradual motor ramp-up on each start reduces mechanical stress and extends fan life.
• Surge Protected: Built-in surge protection safeguards the motor and onboard driver from electrical spikes common in agricultural environments.
• Lighter Weight: Reduced motor weight compared to conventional designs makes assembly and installation easier, especially in overhead or difficult-access locations.
• Aluminum or Poly Shutter Options: Choose aluminum shutters for lightweight durability or poly shutters for added corrosion resistance.
• Galvanized Propeller & UV-Resistant Components: Corrosion-resistant galvanized prop and UV-resistant housing materials stand up to years of outdoor and agricultural use.
• Aerodynamic Fiberglass Housing with Slanted Poly Cone: Optimized airflow geometry delivers up to 34,763 CFM with industry-leading efficiency ratings validated in an AMCA-accredited air test chamber.
• Broad Application Range: Engineered for dairy, poultry, swine, greenhouse, and industrial ventilation where reliable, energy-efficient high-volume exhaust is critical.

Technical Specifications