Exhaust Fans TEF-140
Using Timfog TEF-140 exhaust fans is essential for effective greenhouse cooling, dehumidification, and air exchange through the method of ventilation. These high-capacity fans are crucial for quickly modifying the entire air volume of the greenhouse to control temperature and moisture when natural ventilation is insufficient.
1.High-Volume Cooling (Negative Pressure)
The TEF-140 fans are sized for high capacity, enabling them to move massive volumes of air. They are central to a negative pressure ventilation system:
The fans pull air out of the greenhouse, creating a slight negative pressure inside.
Fresh, cooler air is then rapidly drawn in through automated inlet vents, usually located on the opposite wall or roof.
This forced air movement provides effective convective cooling, removing excess heat rapidly, especially during high solar load periods.
2.Active Dehumidification
During periods of high humidity (like morning hours or after irrigation), passive venting may not be fast enough. The TEF-140 fans quickly exchange the moist interior air with drier exterior air.
This active moisture removal is vital for preventing condensation and significantly reducing the risk of humidity-related fungal diseases, such as Botrytis and mildew, without the energy cost of a dedicated dehumidification unit (GAHU).
3.Optimizing Air Exchange Rate
The fans are selected to match the required air exchange rate—the number of times the entire volume of air inside the greenhouse is replaced per hour. Timfog engineers size the fan capacity to ensure rapid air replacement, which is critical for meeting peak cooling demands.
They work in conjunction with the roof and side vents to provide precise, climate-computer-controlled airflow, ensuring the air inside is always fresh and within the optimal temperature/humidity range.
In summary, the TEF-140 exhaust fans provide the power and reliability needed for instant, high-capacity air exchange, making them indispensable for managing heat and moisture extremes that threaten crop health and productivity.
