Greenhouse Fog Cooling

  • Reduce air temperature on demand
  • Increase humidity on demand

AIS Greenworks fogging systems are made in Australia and tailored to your needs. We always take into consideration your budget, ongoing energy costs, environment uniformity, disease pressure and water use.

Fog Benefits
  • Cool and humidify your greenhouse
  • Fast flash evaporation
  • Create a uniform climate across the greenhouse
  • Reduce energy and water costs
  • Reduce CO2 losses
  • Improve plant productivity
  • Increase production
  • Option to atomise crop protection agents
  • Easy integration with your current climate computer


In Australia the most common and cost effective way to cool and humidify a greenhouse is with a high pressure fogging system.

By flash evaporating billions of tiny water particles at up to 1,250 psi, the air is cooled and humidified.

In technical terms, the sensible energy is reduced while the latent energy of the air is increased.

The end result is a climate more suitable for the plant.

Firstly, water is firstly filtered to 5 micron to mitigate potential nozzle blockages before being pumped at high pressure.

The clean water then flows through a designed network of stainless steel mainlines, stainless steel or thermoplastic laterals, finally emitting 10 micron fog droplets via the stainless steel or brass anti-drip nozzles.

This type of cooling system can provide a wide range of desired temperatures and relative humidity in greenhouses.

The fog system provides a more uniform temperature and humidity condition than a pad and fan system under similar conditions.

Silsoe Research Institute, Published by Elsevier Ltd. 1999

High Pressure Fog Nozzles

There are many different types of high pressure fog system nozzles available on the market. The AIS Greenworks fog nozzle is especially designed for its intended application.

The nozzle comes with a brass body and a fully stainless steel head to increase its life expectancy and reduce failures. Integral to the nozzle is a spring and rubber seat mechanism that prevents the nozzle from dripping when the system is off.

The AIS Greenworks fog system nozzle and body threads are a unique and robust design, which minimise fatigue fractures. Finally, the impeller is removable which means periodic cleaning can keep the nozzles in service for longer.

The nozzle cross section pictured on the right shows five major components: the stainless steel head, the brass body, the impeller, the anti-drip spring and seat. While there are a wide variety of nozzle styles, it is very important that the nozzles are selected appropriately for your application.

Nozzles can come with:

  • Individual filters
  • An assortment of orifice openings

Greenworks Blue Machine

Our premier high pressure fogging system includes:

  • On board water tank
  • Filtration
  • Control panel
  • Pressure regulator
  • De-pressurisation solenoid valve


  • Multiple zone control
  • Variable speed motor control

Range Available

  • 15 lpm (litres per minute)
  • 30 lpm
  • 42 lpm
  • 55 lpm
  • 70 lpm
  • 100 lpm

Australian Design, Manufacture and Installation by AIS Greenworks

Our design team strives to find the balance between capital and operational costs – ensuring a quick return on any investment.

Systems can be designed to any size and this is not limited to only greenhouses. We have delivered high pressure fogging solutions for many applications including commercial buildings, sheds and wine cellars – just to mention a few.

Set-up is as simple as connecting clean water and an electricity source to the inlet side, and connecting the fog lines to the outlet side.

The systems will generally incorporate an on-board water tank, filtration, control panel, pressure regulation and a dump solenoid valve to prevent dripping nozzles. The system can be designed for multiple zone control and variable speed motor control options.

Lateral hoses hang at the top of the greenhouse and are custom made to any particular length and nozzle spacing, designed to ensure a uniform application throughout your greenhouse. All nozzle and end fittings are made of brass and swagged in place prior to shipment.

Mainlines can be supplied as a stainless steel tube or as a thermoplastic hose, depending on the flow rate of the system.

On-Call Service
An AIS Greenworks high pressure fog specialist is always on call to service the fog systems we install, and all parts are readily available from our warehouses Australia wide.

We are always happy to discuss your unique requirements and the different range of options available to give you a top quality system.

This Repair Coupling was developed as an infield repair solution for our 8mm Thermoplastic High Pressure (HP) Fog Lateral where the hydraulic swaged fitting has failed for one reason or another.

In the past the HP Fog Lateral was removed for re-swaging of the Fog Nozzle Connector; now with the development of this Repair Coupling the replacement of the failed connector can be undertaken with the HP Fog Lateral in place.