Greenhouse Humidity Control

When humidity levels become a problem, growers can trust GrowSpan to provide a humidity control system for operations of all sizes, from a grow room dehumidifier to large-scale greenhouse humidity control. Maintaining the right amount of moisture in the air is vital for proper plant growth, but can be difficult. GrowSpan makes it easy to design a custom humidity control system that meets each grower’s individual needs.


  • Optimize plant processes – Improved water and nutrient uptake
  • Create the ideal growing environment – Contributes to effective year-round growing
  • Precision control – Automatically respond to changes in the environment
  • Reduce risk of disease, molds and powdery mildew
  • Improve plant health – Sustained growth and development
  • Energy-efficient designs and options


Humidity levels outside of the desired range can create several problems for the greenhouse grower. Poor grow room or greenhouse humidity control can reduce the amount of nutrients crops absorb, diminishing growth and yield. When humidity levels are either too high or too low, photosynthesis is inhibited, and crops will have poor water uptake. High humidity also promotes the growth of mold and mildew, presenting a possibly devastating scenario for crops.

Therefore, it is important to ensure relative humidity remains within the optimal range. Expressed as a percentage, relative humidity represents the amount of water vapor present in the air in relation to how much moisture the air can hold at that temperature. This is an important factor for growers to understand in the relationship between temperature and humidity, as warm air is able to hold a greater amount of moisture than colder air.

Growers aiming to prevent any potential issues with excess moisture, or a lack thereof, can rest assured that a GrowSpan Greenhouse Specialist will help them design a system to maintain optimal humidity levels. GrowSpan offers a variety of equipment for controlling humidity in a greenhouse on any scale, from a compact dehumidifier to a massive humidity control system for the commercial grower.


Active ventilation systems, using equipment like exhaust and air circulation fans, provide the air exchange necessary to keep humidity levels in their ideal range. This method is essential for the indoor grower. Passive ventilation, on the other hand, relies on Mother Nature and greenhouse design to help replace the humid air inside the structure with cooler, drier outside air. Effective greenhouse humidity control utilizes both passive and active ventilation to optimize air movement and create the ideal year-round growing environment.

With a massive selection of humidity control equipment, GrowSpan supplies growers with the best solution for their specific humidity issues. Whether it’s reducing greenhouse humidity or supplementing it, keeping humidity levels in the desired range can be complicated, so working with a GrowSpan Greenhouse Specialist is the best way to ensure a humidity control system will achieve maximum effectiveness.

To learn more about controlling humidity in your structure, Call or Request a Quote today.


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