The J&D Manufacturing 72" Mega Storm Fiberglass Exhaust Fan is a heavy-duty, high-performance ventilation solution proudly manufactured in Wisconsin. Equipped with a 3 HP UL-recognized motor and twin AX85 heavy-duty industrial notched belts with a double-groove steel auto tensioner, the Mega Storm delivers certified airflow up to 44,734 CFM at 0.10" static pressure. Its four-point contact X-frame and UV-resistant fiberglass housing are built for long-term durability in the most demanding dairy, poultry, swine, greenhouse, and industrial environments. Available in single-phase and three-phase configurations, with or without a performance cone.
Features & Benefits
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4-Point Contact X-Frame: Heavy-duty X-frame design provides superior structural strength and long-term durability under continuous high-load operation.
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Twin Belt Drive with Auto Tensioner: Double-groove steel belt tensioner and twin AX85 belts extend drive life; tool-free belt access means replacements take seconds.
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UV-Resistant Fiberglass Housing: Smooth exterior resists UV degradation and is easy to clean, reducing maintenance burden over the life of the fan.
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5-Blade Aluminum Propeller: High-efficiency 5-blade aluminum prop delivers powerful, consistent airflow with low noise.
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High Performance & High Efficiency Models: Choose the model that best fits your operation's airflow and energy requirements.
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With or Without Cone: Performance-boosting fiberglass cone option available for increased airflow projection.
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Drainage Holes: Bottom-of-housing drainage prevents moisture accumulation in high-humidity environments.
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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 |
| VMSA72A5N31 |
3 |
230 |
14.5 |
1 |
317 |
No |
45,683 |
42,736 |
38,960 |
33,717 |
25,090 |
1.72 |
No |
| VMSA72A5C31 |
3 |
230 |
14.5 |
1 |
318 |
Yes |
47,659 |
44,728 |
40,792 |
34,435 |
25,679 |
1.81 |
No |
| VMSA72A5N33 |
3 |
230/460 |
9.0/4.5 |
3 |
337 |
No |
48,891 |
46,150 |
42,950 |
38,276 |
29,782 |
1.64 |
Yes w/VFD |
| VMSA72A5C33 |
3 |
230/460 |
9.0/4.5 |
3 |
340 |
Yes |
51,080 |
48,016 |
44,734 |
40,295 |
28,722 |
1.71 |
Yes w/VFD |