Products & Info

Silo Vent

Silo Vent is an energy-efficient unit with a wind-driven ventilator. The heat, humidity and condensation are drawn out through the ventilator, while stabilising the internal temperature of the stored grain. Silo Vent units are environmentally friendly, as they are powered by the wind. There are no running costs with a Silo Vent system: they run for free 24 hours a day, 7 days a week.

Silo Vent has two different units, one for use in all types of non-sealed silos, and the other, the Damper Model, designed for use in sealed silos.
Damper Model

The sealed silo unit (Damper Model) is designed for use in sealed silos, enabling them to be sealed at the ventilator with a damper. The damper effectively seals the silo at the throat of the ventilator, a bit like a butterfly valve, and remains shut for the duration of the chemical treatment period, enabling fumigation of the sealed silo to be completed. The damper is located inside the Silo Vent and opened and closed from the ground via a cable. When the treatment period for the grain and or legumes has finished, the damper is opened and the Silo Vent Damper unit exhausts the build-up of heat, humidity and condensation inside the sealed silo, enabling the grain to breathe. 
The Damper unit works very well with the Air Intake Vents which are located in the cone of the sealed silo, designed for fumigation tablets to be inserted and withdrawn into the silo at the safety of ground level. When the chemical treatment period has finished, the Air Intake Vents enable air to be drawn in from the cone of the silo, and with the Silo Vent Damper unit on top of the silo, the air is moved passively through the silo and exhausted out the top. This activity keeps the stored commodity cooler and reduces the hot spots in the silo. 

Silo Vent is an Australian-made and -developed product. It has been researched, tested and developed within the Australian Agricultural Industry for the purpose of improving the quality and management of stored grains and legumes.

Air Intake Vents
Air Intake Vents (AIV) are fitted to the underside of cone-based silos and just above ground level of straight-sided silos. The inside of the AIV protrudes into the silo and is protected with an insect-proof cap and stainless steel mesh. The outside of the silo the screw cap allows you access to the canister and open air vent.

The AIV work very well with Silo Ventilation Systems’ ‘Silo Vent’, which is a wind-driven ventilator located at the top of a silo. Together the units drawn air in from the bottom of the silo, and air is moved passively through the silo and exhausted out the top of the silo. This action reduces the build-up of heat, humidity and condensation in stored commodities.

The NEW AIV-BB features heavy-duty construction with seamless fittings, thereby increasing the amount of phosphine tablets that can be added. This also means that fewer units are required for larger silos.

The number of AIVs required depends on the silo’s storage capacity:
  • Silos up to 50 tonnes: 1 x AIV
  • 51-120t: 2 x AIV
  • 120-200t: 3 x AIV
  • 200t+: 4 x AIV
Fumigation Chamber
The Air Intake Vents have a dual role. In addition to allowing airflow through the silo, they can also assist in fumigation. 

They can hold a canister with chemical tablets spaced out evenly, which is inserted into the AIV and screwed air tight. At the completion of the treatment period, as per the chemical manufacturer’s recommendations, remove the end screw cap and dispose of the chemical residue in accordance with your state’s requirements for handling of chemicals. All this work is done from the safety of the ground.

Leaving the outside screw cap off after the chemical treatment period allows fresh air to be drawn in at the bottom of the silo and pass through the silo and commodity, removing any chemical residue smell, while lowering the internal temperature and humidity of the silo.
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Air Intake Vents (AIV) are designed with the safety and health of the grain handler and the commodities and consumer in mind. Silo Ventilation Systems have designed the AIV for the grain handler to operate all chemical tablet treatments and air venting of silo at the safety of ground level. There’s no more climbing ladders to place and remove phosphine tablets from the top of a silo. Furthermore, the chemical tablets don’t come in contact with the stored commodity.

The Silo Vent product range covers sealed and non-sealed silos. There are no running costs or ongoing maintenance with Silo Vent products.
All AGnVET stores in regional NSW distribute our products. See their website for locations: 

Tower Hire
Andrew Petrie,
Mobile 0418 533 884
St. Arnaud, Vic.

Norm's Bin & Silo Windows
Norm Pitcher,
03 5391 0220
Mobile: 0429 859 890
Nhill, Vic.
Silo Vent is a low-cost and maintenance-free way to effectively reduce the inside temperature and humidity of your silos stored with grain or legumes.

The silo ventilator is an energy-efficient system which creates a venturi effect, drawing out the unwanted heat and humidity and allowing fresh air to circulate while stabilising the internal temperature of the stored grain. This can then lead to a reduced optimum breeding environment and temperature for possible insect infestation. Chemicals applied to stored grain could be reduced; however, proper stored grain handling management still needs to be undertaken.

The Silo Vent is best located on the silo cap or lid at the top of the silo. The unit is attached to the lid as a fixture. When filling the silo, tilt or slide the lid to one side as normal, allowing the unit to rest on the silo roof, out of the grain auger’s way.
  • Reduces inside temperature of a silo.
  • Reduces humidity and condensation build-up in silos.
  • Exhausts unwanted heat from the top of the silo.
  • Replaces and circulates air inside silo.
  • The temperature of stored grain or legumes is more stable.
  • Reduces mould build up.
  • The optimum breeding environment for insects is less favourable.
  • The amount of chemicals applied to stored grain can be reduced.
  • No electrical powered connection is required.
  • Operates 24 hours per day, 7 days a week
  • No switches or timers to turn off or on.
  • No additional running costs for the unit. It runs for free.
  • Easy to install.
  • No ongoing maintenance after installation.
  • Damper model designed for sealed silos.
Grain Management
The top of any silo is where the heat and condensation are always present and can become an ideal breeding environment for an insect attack.

By reducing the internal temperature and humidity levels at the top of the silo and on the surface of the stored grain, it makes the silo a less attractive option for insects.

Constant air movement reduces the possibility of condensation forming on the walls of the silos and assists with stabilising the temperature of the grain stored.
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Safe Phosphine Handling
Silo Ventilation Systems have been working on improving the phosphine handling of chemicals in grain storages over the past 15 years.

Working on OH&S best practices of handling phosphine at ground level, Silo Ventilation Systems have developed a heavy-duty Air Intake Vent and Fumigation Chamber to handle the dispensing of phosphine gases by installing phosphine from the ground level.

This alleviates the need for high-risk installation of phosphine tablets using ladders to access the tops of the silos. Proven results have indicated a 2- to 3-day turnaround for gases to pass through grain from the bottom entry AIV by means of natural air convection currents.

This means that the grain is getting a better distribution of gases through the volume of grain stored.

The removal of residue from the AIV is simple from ground level and of minimal risk compared to climbing the silo ladder and having residue powder blown back into silo, directly effecting grain contamination and also human contamination.
Chemical Storage Ventilation
Stored chemicals should be stored in their closed original containers, in a dry and well-ventilated area, out of direct sunlight.

The stagnant smell of stored chemicals can be overwhelming when entering your chemical storage shed and a real OH&S issue.

The wind-driven Australian made Industrial Roof Ventilators, distributed through Silo Ventilation Systems, are designed to expel hot, humid and stagnant air from inside your enclosed chemical storage shed, allowing for better management of your stored chemicals and your health.

Why use a commercial vent instead of a domestic ventilator? They’re 40% more efficient and have a lifespan far greater than that of domestic ventilators.
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