Natural (Passive) Greenhouse Ventilation
The natural ventilation system in greenhouses utilizes wind pressure differences and thermal buoyancy between the inside and outside to drive airflow. This enables efficient air exchange, temperature reduction, and humidity regulation without additional energy consumption. It is one of the most economical, eco-friendly, and widely adopted climate-control methods worldwide.
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How It Works？
Natural ventilation operates through two natural forces:
- Wind Pressure: Wind creates a positive pressure on one side of the greenhouse and negative pressure on the opposite side, driving airflow.
- Thermal Buoyancy (Stack Effect): Warm air rises and escapes through roof vents while cooler outside air enters from lower openings.
The combination ensures continuous and efficient air exchange.
Low Cost & Energy Saving
Requires little to no electrical power, minimizing operating costs.
Excellent Air Circulation
Efficiently removes heat, humidity, and CO₂, reducing disease risk.
Strong Cooling Performance
Roof + side ventilation significantly lowers inside temperature.
Customizable Structure
Various configurations available depending on climate and greenhouse structure.
Types of Natural Ventilation
Side Ventilation
Manual-controlled side wall ventilation system
Top Ventilation
Roof vents exhaust rising warm air efficiently.
Vertical and Horizontal Ventilation
Fully automatic electrically controlled window ventilation system
Side Roll-up Ventilation
The simplest manual film rolling ventilation method
Application Scenarios
Natural ventilation is suitable for most crops that require airflow and moderate temperatures
Vegetables: tomatoes, cucumbers, peppers, eggplants, leafy greens
Fruits: strawberries, grapes, blueberries
Flowers: roses, chrysanthemums, carnations
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