Galvanized Steel Negative Pressure Exhaust Fan

• Large-Volume Negative-Pressure Ventilation: Designed to rapidly exhaust warm, humid and stale air from livestock buildings.
• Thickened Galvanized Steel Housing: Provides a durable structure for demanding agricultural environments.
• High-Density Safety Mesh: Galvanized protective grille improves operational safety and corrosion resistance.
• One-Piece Formed Fan Blades: Frameless stamped blade construction offers good rigidity, low vibration and stable operation.
• U-Profile Blade Design: Optimized blade geometry supports strong airflow with reduced operating noise.
• Pure-Copper Motor: Dust-resistant motor configuration is designed for reliable livestock-house operation.
• Automatic Shutters: Rear louvers open automatically when the fan starts and close when the fan stops.
• Heavy-Hammer Version Available: ZC series configurations use a counterweight mechanism for reliable shutter operation.
• Manual Shutter Opening: Selected heavy-hammer versions allow the louvers to be opened manually for natural ventilation.
• Wide Model Range: Multiple frame sizes are available for small barns, large commercial farms and ventilation renovation projects.

• Commercial pig houses
• Sow gestation and farrowing barns
• Piglet nursery and finishing houses
• Broiler and layer poultry houses
• Dairy and beef cattle barns
• Sheep and goat buildings
• Negative-pressure ventilation systems
• Tunnel ventilation systems
• Cooling-pad and exhaust-fan systems
• Livestock-house ventilation renovation projects

• Select fan quantity and size according to house dimensions, stocking density, climate and required ventilation rate.
• Install the fan on a reinforced wall opening and keep the frame square and level.
• Seal gaps between the fan frame and building structure to prevent uncontrolled air leakage.
• Confirm correct blade rotation and free shutter movement before continuous operation.
• Keep protective grilles, blades and shutters free from dust, feathers and accumulated debris.
• Inspect motor wiring, bearings and transmission components regularly.
• Check fasteners if excessive vibration or unusual noise occurs.
• Protect the motor and electrical components from direct high-pressure washing.
• For automatic farms, connect fan stages to a compatible environmental controller according to the ventilation design.

Q: What sizes are available?
A: Multiple sizes are available, from compact 400-class units up to large 1750-class exhaust fans.

Q: What is a negative-pressure fan?
A: It exhausts indoor air to create lower pressure inside the building, causing fresh outdoor air to enter through designed ventilation inlets.

Q: Does the fan have automatic shutters?
A: Yes. Standard configurations use shutters that open during fan operation and close after shutdown.

Q: What is the heavy-hammer version?
A: The ZC heavy-hammer series uses a counterweight mechanism to improve shutter opening and closing reliability.

Q: Can it be used with cooling pads?
A: Yes. Negative-pressure fans are commonly combined with evaporative cooling pads for summer tunnel ventilation.

Q: Is it suitable for commercial pig farms?
A: Yes. Multiple fan sizes can be staged according to minimum, transition and summer ventilation requirements.

Q: Can voltage and motor specifications be customized?
A: Yes. Electrical configuration can be selected according to project requirements and destination-market power standards.

Q: How many fans does a livestock house require?
A: Fan quantity should be calculated according to animal type, stocking density, building volume, target air velocity, required air exchange and selected fan performance.