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Greenhouse Cooling Exhaust Fan

A greenhouse exhaust fan is a critical ventilation device designed to regulate temperature, humidity, and air quality inside greenhouses. By removing stale air and drawing in fresh outdoor air, greenhouse exhaust fan creates a controlled environment for plant growth, preventing issues like overheating, mold, and pest infestations.exhaust fan greenhouse

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Greenhouse EXHAUST FAN

Components:

Blades: Typically made of corrosion-resistant aluminum or plastic, designed for high airflow and low noise.
Motor: Usually enclosed in a weatherproof casing to withstand humidity; AC motors are standard, while EC motors offer superior efficiency.
Shutters/Vents: Automatically open when the fan operates and close when idle to prevent heat loss or pest entry.

Product Paramenters

Model of greenhouse exhaust fan	STEF1530	STEF1380	STEF1220	STEF1100	STEF1000	STEF900
Size (mm)	1530*1530	1380*1380	1220*1220	1100*1100	1000*1000	900*900
Air Flow (m3/h)	48000	44000	38000	32000	25000	22000
Power (km)	1.5	1.1	0.75	0.75	0.55	0.55
Blade dia (mm)	1400	1270	1100	1000	900	750

Wide Application

The exhaust fan in greenhouse is also called cooling fan, usually working together with Evaporative Cooling Pad. this exhaust fan in greenhouse is mainly used for ventilation and cooling system in greenhouses, factories, poultry farm like chicken farms, pig farms, etc.

Temperature Control

Rapidly expels hot air during sunny days to prevent heat stress on plants (ideal temperature: 20–30°C for most crops).
Works with cooling systems (e.g., evaporative pads) to lower indoor temperatures via cross-ventilation.

Humidity Regulation

Reduces excess moisture to minimize fungal diseases (e.g., powdery mildew) and condensation on greenhouse surfaces.

Air Circulation

Enhances CO₂ distribution for photosynthesis and removes ethylene (a plant hormone that accelerates ripening or senescence).

exhaust fan in greenhouse

greenhouse exhaust fan

Advantages:

Cost-effective compared to mechanical air conditioning.
Low maintenance for axial fans; energy savings with EC motors.
Scalable for all greenhouse sizes (small hobby greenhouses to large commercial facilities).

Working Principle:

The fan creates negative pressure inside the exhaust fan greenhouse.
Fresh air is drawn in through inlet vents or cooling pads, creating a cross-ventilation flow.
In integrated systems, fans may sync with thermostats, humidity sensors, or timers for automated operation.

exhaust fan greenhouse

By selecting the right greenhouse exhaust fan and optimizing its operation, growers can maintain an ideal microclimate for healthy plant growth while minimizing energy and maintenance costs.