Butterfly Cone Fan
How the Butterfly Cone Fan Works
The butterfly cone fan operates on the principle of negative pressure ventilation:
Exhaust: The fan pulls air out of the building through the cone-shaped housing
Negative Pressure: This creates a vacuum effect inside the structure
Air Intake: Fresh air is drawn in through controlled inlets (such as side wall inlets or cooling pads)
1. Butterfly-Style Double Door System
The signature feature of this fan is the front double-door opening mechanism:
Dual-door design Reduces wind resistance; opens smoothly with minimal pressure loss
Rubber sealing device Ensures airtight closure when fan is off; prevents backdraft and pest entry
Self-cleaning operation Doors open and close with each cycle, preventing dust accumulation
Improved efficiency Compared to standard shutters, butterfly doors increase operating efficiency by 15-20%
2. Extended Cone (Air Funnel) Design
The bell-mouth or cone-shaped housing provides significant performance advantages:
Increased exhaust pressure: The tapered design accelerates airflow, creating higher static pressure capability
Improved air velocity: Air is channeled and accelerated through the cone for maximum exhaust efficiency
Reduced turbulence: Smooth aerodynamic profile minimizes air resistance
Better long-range exhaust: Ideal for tunnel ventilation systems requiring air movement over long distances
3. High-Performance Fan Blades
Advantages Non-deforming, non-breaking, self-cleaning, dust-resistant, attractive appearance
Size and packaging guidelines
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| Specification | Chair | Armchair | Sofas |
| Height | 37" | 42" | 42" |
| Width | 26.5" | 32.5" | 142" |
| Depth | 19.5" | 22.5" | 24.5" |
| Assembly Required | No | No | Yes |
| Packaging Type | Box | Box | Box |
| Package Weight | 55 lbs. | 64 lbs. | 180 lbs. |
| Packaging Dimensions | 27" x 26" x 39" | 45" x 35" x 24" | 46" x 142" x 25" |
In modern poultry and livestock operations, effective ventilation is critical for animal health, productivity, and profitability. Our Butterfly Cone Exhaust Fan, also known as the butterfly blade cone fan or bell-mouth fan, represents the pinnacle of negative pressure ventilation technology. Featuring a unique front double-door opening system and an extended cone (air funnel) design, this fan delivers exceptional airflow performance while minimizing energy consumption .
The fan derives its name from the distinctive butterfly-style shutters that open outward when the fan operates, creating a sleek, aerodynamic profile that reduces wind resistance and maximizes exhaust efficiency. When multiple fans are used in a coordinated system, they create powerful negative pressure ventilation that effectively cools and refreshes even the largest poultry houses, livestock barns, and greenhouses .
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