J&D Manufacturing 72" Mega Storm II Exhaust Fan – 40,121 CFM

The J&D Manufacturing 72" Mega Storm II Exhaust Fan is engineered for exceptional airflow performance and energy efficiency in large-scale barn ventilation systems. Built with a UV-resistant smooth-molded fiberglass housing, a reinforced triangle X-frame, and twin AX85 heavy-duty belts, the Mega Storm II delivers high-volume airflow up to 47,330 CFM at 0.10" static pressure. Available in high-performance and high-efficiency models with or without a performance-boosting cone, it's the go-to choice for dairy, poultry, and livestock operations demanding reliable, low-maintenance ventilation. Features & Benefits Reinforced Triangle X-Frame: Improved triangle X-frame design delivers greater structural strength and long-term durability compared to standard frame configurations. Thick UV-Resistant Fiberglass Housing: Smooth-molded fiberglass resists chipping and corrosion far better than competitive models, ensuring reliable performance in harsh agricultural environments. Twin Belt Drive System: Twin AX85 heavy-duty industrial notched belts are easily accessible and require no tools for replacement - swap belts in seconds. High-Performance & High-Efficiency Models: Choose the model that best fits your operation - up to 47,330 CFM for maximum airflow or over 21 CFM/Watt for maximum energy savings. Optional Performance-Boosting Cone: Available with or without a cone to optimize airflow projection for your facility layout. Drainage Holes: Bottom housing drainage holes prevent moisture buildup, maintaining performance in wet or high-humidity environments. VFD Compatible (3-Phase Models): Three-phase models support Variable Frequency Drive operation for variable speed control and energy savings. Technical Specifications Part # HP Volts Amps Phase RPM Cone CFM @ 0" SP CFM @ 0.05" SP CFM @ 0.10" SP CFM @ 0.15" SP CFM @ 0.20" SP FEI @ 0.10" VFD Compatible VMA72A5C33 3 230/460 9/4.5 3 299 Yes 45,173 42,594 39,270 35,419 30,622 2.35 Yes w/VFD VMA72A5C33-E 3 230/460 8.4/4.2 3 298 Yes 45,921 43,213 40,121 36,484 30,779 2.43 Yes w/VFD VMA72A5C33-H 3 230/460 8.4/4.2 3 342 Yes 51,865 49,961 47,330 44,214 41,308 1.93 Yes w/VFD