Humidity control in Greenhouses
Humidity control in Greenhouses
Humidity control in Greenhouses
Humidity control in Greenhouses

Humidity control in Greenhouses

Greenhouse Climate Control

Misting/Fogging systems are fast becoming standard equipment for all greenhouse climate control applications. As an environmental control system, they can have a dramatic effect on greenhouse productivity.

Humidity Control

Greenhouse productivity is dependent on many factors. A MISTING system cannot control or affect all variables, but it can have a positive impact by regulating the temperature, humidity and moisture content within the greenhouse.

This capability will promote increased health and productivity within the greenhouse by eliminating ‘plant water stress’, one of the most significant factors in the growth of all plants.

Plants lose their moisture through evaporation from the leaves. They also gather carbon needed for growth in the form of carbon dioxide through the leaves. By controlling the plants pores through the use of a properly designed MISTING system, the results are stronger and healthier plants with optimum growth potential.

Fog systems can also be used to introduce fertilizers by injecting nutrients directly into the atmosphere. The moisture and the nutrients are absorbed by the leaves of the plant.

How does it work

With the use of Misting SA’s   series of speciality MIST nozzles placed in a specified area, or by using specially designed misting rings, attached to box / oscillating fans.  When connected to a high pressure MISTING system pump, water is forced through the specialty nozzles and quickly atomized to droplets as small as (5 microns).

MISTING systems will produce billions of tiny droplets every second. If these droplets are introduced into an outdoor area, they quickly evaporate. This process of evaporation requires energy to be completed. The energy is taken from the air in the form of heat. The result is a temperature reduction of up to 12 degrees, depending on the ambient temperature and the relative HUMIDITY of the air. This method of temperature reduction is the most common use for all misting systems.

When MISTING systems are placed inside an enclosed area (such as a greenhouse), the billions of droplets that are produced will initially provide cooling as the droplets evaporate. However, if the air exchange is limited, the MISTING system will continue to increase the humidity level within the structure. Humidity levels as high as 90+% are possible. This unique characteristic of all MISTING systems makes them ideal for both outdoor cooling and humidification.

What components are needed for a misting system?

The required components for a misting system includes
Misting SA High pressure tubing (Nylon, Stainless steel or Copper)
Misting SA misting nozzles
Misting SA misting spray body
Misting SA Filtration Housing and cartridge
Misting SA Pressure Switch
Misting SA Solenoid Valves (low and high pressure)
Misting SA Anti drip valve
Misting SA high pressure misting pumps (various flow rates)
Misting SA Humidity and temperature controllers * Optional
Misting SA ventilation equipment. * Optional
* Additional components (such as wall mounted fans, extractor fans, Humidity and Temperature controllers) may be required for custom designed solutions.

Contact Details

Nr 10 B Julian Way,
Somerset West Business Park
South Africa

Enquiries and Quotes

Sylvia Keyser
+27 82 925 2012

Technical Enquiries

Christo Keyser
+27 82 412 1255


+27 21 852 6192

Pretoria Branch

Contact person: George
+27 12 807 1499
By appointment only


CPT Branch

PTA Branch

(by appointment only)