How to Choose Greenhouse Cooling Pad and Exhaust Fan Systems

Cooling pad and exhaust fan systems are common in commercial greenhouses located in hot regions. The system uses exhaust fans to pull air through wet cooling pads, reducing air temperature through evaporative cooling. When designed correctly, it can improve crop comfort and worker conditions. System sizing is the first important issue. Fan capacity, pad area and greenhouse length should be calculated together. If the fans are too small, air exchange will not be enough. If the cooling pad area is too small, airflow resistance increases and cooling efficiency drops. A balanced design is more important than simply buying larger equipment. Greenhouse layout affects performance. Fans and cooling pads are usually installed on opposite sides so air can move through the growing area. Long greenhouses may need special layout planning to avoid uneven cooling. Obstacles inside the greenhouse can also affect airflow. Water quality matters. Cooling pads work best when water is clean and properly filtered. Poor water quality can cause scale, algae and blockage. Regular cleaning and maintenance help extend pad service life and keep the system efficient. The system should be combined with shading and ventilation. In very hot regions, fan and pad cooling alone may not be enough during peak summer. External shading, roof ventilation, circulation fans and irrigation planning can all support better climate control. For buyers planning a greenhouse cooling system, useful project details include greenhouse size, local summer temperature, humidity, crop type, water quality and available power supply. NSR Greenhouse can help design and supply cooling pads, exhaust fans and complete greenhouse cooling systems.