Don't just buy any Fan, Invest in a Typhoon Fan you can rely on to pass down to the next generation.

When you make a decision to buy a Typhoon Fan you can be assured it will be built to last, following decades of experience from many thousands of drying hours.

** Typhoon TC Fans now come with a 5 year Guarantee* ** 

(* on new TC fans delivered after 1st October 2020, when installed with a Pellcroft supplied Star Delta or Inverter starter - starter guaranteed for 2 years)


As all our fans are built from scratch at our factory, we are able to customize the size and frame to suit any fan house configuration, recondition old fans (including Matthews and Yates models) and rebalance impellers.

Downdraft Centrifugal Grain Store Fans

The TYPHOON "TLV" range of low volume fans are most commonly used for ventilation, to control the temperature in ‘dry’ stores where the grain has already been dried down to the desired moisture content level. They are, therefore, not designed to reduce grain moisture content, but are used to blow cooling air through stored grain in order to prevent deterioration through overheating.

Nevertheless, grain stored at moisture levels of up to 20% can be stored safely for a significant period of time, if the ventilation system can provide an adequate flow of air which will enable the temperature within the grain to be reduced to a level which will prevent sprouting, mould growth and insect activity.


The TYPHOON “TC” range of centrifugal fans incorporates many years of experience in the design and manufacture of fans for drying and conditioning of grain, potatoes, onions, seeds, straw/hay and, in more recent years, wood chip.

They are of rugged all steel construction and have high efficiency backward curved impellers which have non-overloading characteristics whilst maintaining excellent performance against high back pressures. Powered by 3 phase 415v 50Hz electric motors, engine or tractor PTO. Available in standard external fan house configuration or downward discharge, on tunnel configuration.

These fans will give many years of trouble free service.

Fans can be supplied with control panels, Stardelta starter, motor fuses, overload, door isolator and full humidity and temperature controls.


The TYPHOON "TAB" range of mobile centrifugal fans are primarily used for drying smaller parcels of grain, oil seed and pulses; often stored in bins, the drying of baled hay and the ventilation of potatoes, onions and flower bulbs.

Wheels and a handle make these units fully mobile.  Available with either single or three phase electric motors.

Typhoon Wall Plate Fan

The TYPHOON "Wall Plate" range of belt driven fans are specifically designed to extract high volumes of air to ventilate agricultural buildings, providing high air output using minimal energy consumption. The wall mounted ventilation fan prevents the humid warm air collecting in ceiling voids, which causes crop deterioration by dripping moisture back down onto the crop.  In grain stores the fans are able to extract 12 cubic metres per second of humid air using only a small 1.1 kilowatt motor. The ventilation fan opens the back draught dampers on the fan when switched on and close when off, removing the need to install a weather cowl.

These are available in single and three phase and diameters of 800mm, 1000mm, 1250mm and 1500mm.

DSCN0119 - downdraft

For some customers, one Typhoon Fan is never enough.....

IMG_0473 - Wide

Frequently asked questions.....

What size fan do I need for my drying floor?

The size of fan or fans needed for your drying floor will depend on how many tonnes you are aiming to dry in one go and how deep you are storing the crop.  The depth of storage will then determine the pressure needed to drive the air through the crop.  We measure this in Inches of SWG (Standard Water Gauge) but it can also be measured in Pascals; 1 inch SWG is approximately equal to 249 Pascals. As a guide, the following SWG are appropriate for these respective storage depths:

Up to 4ft storage 2" SWG

above 4ft to 6ft storage 3" SWG

above 6ft to 8ft storage 4" SWG

above 8ft to 10ft storage 5" SWG

above 10ft to 12ft storage 6" SWG

above 12ft to 14th storage 7" SWG

above 14ft to 16ft storage 8" SWG

Having determined the SWG, the next task is to calculate the CFM (Cubic Feet per Minute) of airflow required.  Airflow can also be measured in cubic m/hr.  1 cfm is approx. 1.7 cubic m/hr.  As a guide, approx. 100cfm is required per tonne for unstirred grain and approx. 70cfm per tonne for stirred grain.  We also suggest that you only consider half the size of the full store.  For example, for a 400T store aim to use a fan suitable for drying 200T @ 100cfm/T, so 20,000cfm.  For most grain stores, drying half a store at a time is sufficient.

Once you have determined the CFM and the SWG then you can refer to the Centrifugal fan table below to determine the fan or fans required to meet your needs. or refer to our fan leaflet: TC Range of Centrifugal Fans   Note that for efficiency reasons, 2 fans of the same size are often used together (Duplex), so that once the grain is dry, one fan can be run on its own to condition the whole store.  For larger stores 3 or 4 fans can be used either in downward discharge configuration in a raised fan house (largest fan suitable for raised fan house is the TC5 40HP) or via a Y configuration in a large external fan house.  Note that the tunnel/airduct can create a bottle neck causing back pressure to stall the fans if it is too small.  Each square foot of the tunnel's internal cross section allows approx. 2,000cfm of air flow; our smallest tunnel (6ft x 3ft) would have a capacity of approx. 36,000cfm and our largest tunnel (12ft x 6ft) would have a capacity of approx. 144,000cfm.  If more airflow is required than the tunnel can allow, it is possible to overcome this by having a fan house at either end of the tunnel or an external fan house combined with a raised fan house.


Typhoon TC Range of Centrifugal Fans

Typhoon TC Fan Range

What size fan do I need for my conditioning store/bin?

As with drying, the size of fan or fans needed for conditioning will depend on how many tonnes you are storing.  The storage depth is relevant in our fan size calculation, however, we tend to assume 2" SWG and allow 5cfm/tonne up to 10ft storage and 7cfm/tonne above 10ft.

Once you have determined the CFM required, you can refer to our Low volume and Portable Fan sheet, to determine the fan or fans required to meet your needs: Typhoon Low Volume TAB Portair  Note that if a lateral floor is being installed, pipes can be run outside the store from each run and the one or more portable fans shared across the store.  In this case, lateral runs should be set at 10ft centres, estimate the tonnage stored between each 10ft section and select the appropriate fan.

What are the power requirements for the Typhoon TC range of fans?

The following table can be used as a guide for the power requirements for a the TC fans.  As a rule of thumb, the starting amps required for a fan is 2.5x the running amps for the fan.  For a duplex pair of fans it would be 3.5x the running amps of one fan, this is because the Star Delta starter will only start the second fan once the first fan is up and running.  Always seek advice from a qualified election.

Typhoon Fans - Electrical Info