Greenhouse Cooling System
Table of Contents
Why Choose FANGCHENG?
Customizable, professional, and knowledgeable. We produce cost-effective & high-quality commercial greenhouses.
A dependable cooling system is essential for controlling high temperatures, preventing heat stress, and maintaining consistent crop performance during warm seasons. For commercial growers, effective cooling ensures stable plant growth, improves yield quality, and reduces production risks when outdoor temperatures rise.
We offer complete greenhouse cooling solutions customized to your climate, structure, and crop requirements. Our service includes airflow planning, system design, equipment selection, and integration with shading and ventilation strategies to help you build a balanced and energy-efficient climate environment.
Why Cooling Matters
in a Greenhouse
Greenhouses trap solar radiation, causing internal temperatures to rise rapidly. Without proper cooling, plants experience heat stress, reduced photosynthesis, dehydration, and in severe cases, irreversible damage. Cooling systems prevent excessive heat buildup, maintain ideal humidity, and create a stable microclimate that supports healthy plant development.
Proper cooling is not only about lowering temperature; it also regulates airflow, evaporation, and moisture levels, ensuring the entire environment works in harmony for optimal crop growth.
How Cooling Works
in a Greenhouse
Cooling relies on three main mechanisms: removing warm air through ventilation, lowering air temperature through evaporation, and reducing solar heat load before it reaches the crop. An efficient cooling system coordinates these mechanisms while interacting with shading, insulation, and automated climate controls.
Airflow plays a central role. As temperatures increase, vents, fans, fogging systems, or cooling pads help bring cooler air into the structure. Sensors and automated controls adjust system operation in real time, ensuring consistent indoor conditions with minimal energy waste.
Common Cooling Methods
in Commercial Greenhouses
Natural Ventilation
Natural ventilation uses roof vents, side vents, and temperature-driven air movement to remove heat. In suitable climates, it is one of the most energy-efficient cooling methods. However, its effectiveness depends on outdoor temperatures, wind conditions, and greenhouse design.
Mechanical Ventilation
Mechanical ventilation relies on exhaust fans and intake openings to actively force air movement. By creating negative pressure, warm air is pulled out while cooler air enters. This method provides reliable cooling performance even during windless or extremely hot conditions.
Evaporative Cooling Systems
Evaporative cooling is highly effective in regions with warm, dry weather. When warm air passes through wet cooling pads, water evaporates and instantly lowers air temperature. Combined with fans, this system delivers uniform cooling and maintains proper humidity levels for many crop types.
High-Pressure Fogging / Misting
Fogging systems release ultra-fine water droplets that evaporate quickly, reducing temperature and increasing humidity. This approach allows precise climate control and is suitable for propagation, ornamentals, and crops that benefit from higher humidity.
Shading Systems
Shading reduces the amount of solar radiation entering the greenhouse. External shading screens, retractable thermal curtains, or shade cloth significantly lower cooling demand and protect crops from direct exposure to strong sunlight.
Key Factors That Influence Cooling Requirements
Cooling system design depends on greenhouse size, structural materials, climate, and crop sensitivity. Transparent coverings such as glass and polyethylene allow large amounts of solar heat gain, increasing cooling load.
Crop physiology also plays an important role. Leafy greens, flowers, and young seedlings have narrower temperature tolerances, while fruiting crops may tolerate slightly higher temperatures as long as humidity remains balanced.
Local weather conditions—including outdoor temperature, humidity, and sunlight intensity—determine whether natural ventilation, mechanical cooling, evaporative cooling, or a hybrid system is required.
Energy efficiency is another critical consideration. Well-designed ventilation, thermal screens, insulation, and automated controls greatly reduce energy consumption and improve long-term operational stability.
What can I get?
Please leave your contact email, and one of our professional greenhouse engineers will reach out to you within 24 hours.
Airflow Distribution and Climate Balance
A high-performing cooling system must deliver air evenly across the greenhouse to avoid hot spots and ensure uniform crop development. Proper placement of fans, ducts, and inlet openings creates a smooth airflow path that reaches the entire crop canopy.
Cooling also affects humidity, so the system must work together with heating, dehumidification, and ventilation. Excess humidity increases disease risk, while insufficient cooling leads to heat stress. A balanced approach maintains steady temperature and humidity with minimal environmental fluctuation.
Energy and Water Considerations
Mechanical cooling systems depend on electrical power, while evaporative cooling and fogging systems require consistent water supply and filtration. Clean water helps prevent mineral buildup on pads and nozzles, extending system lifespan and improving efficiency.
Water-saving and energy-saving strategies—such as closed-loop water reuse, automated flow regulation, and high-efficiency fans—help reduce long-term operating costs, making greenhouse cooling more sustainable.
Latest Trends and
Technological Improvements
Modern cooling systems incorporate digital climate control, real-time temperature and humidity monitoring, and automated decision-making. High-precision fogging, hybrid cooling systems, and intelligently managed shading systems are increasingly adopted to improve climate stability.
Sustainability is also becoming a key priority. Growers favor solutions that reduce water usage, minimize electricity consumption, and maintain consistent cooling performance across seasonal variations.
Conclusion
A well-engineered greenhouse cooling system is vital for healthy plant growth, stable production, and efficient operation during warm months. Effective cooling integrates airflow, evaporation, shading, and humidity management into a cohesive climate strategy. By understanding the principles and selecting the right system for the greenhouse structure and local climate, growers can build an environment that supports reliable, high-quality crop output throughout the season.
FAQs About Greenhouse Cooling Systems
1. What is a greenhouse cooling system?
A greenhouse cooling system is a climate control setup designed to lower temperature, remove excess heat, and maintain ideal growing conditions. It may include ventilation, evaporative cooling, fans, fogging systems, and shading.
2. What is the cooling system for a greenhouse?
Greenhouses typically use natural ventilation, mechanical ventilation, evaporative cooling pads with fans, or high-pressure fogging. The right system depends on the climate and the greenhouse structure.
3. How do you keep a greenhouse cool in 100-degree weather?
To keep a greenhouse cool in extreme heat, use strong mechanical ventilation, evaporative cooling pads or fogging systems, and external shading. Good airflow and reduced sunlight exposure are essential to prevent heat stress.
4. What is the active cooling system in a greenhouse?
Active cooling refers to systems that use powered equipment—such as exhaust fans, evaporative cooling pads, and high-pressure fogging—to actively move and cool air inside the greenhouse.