PO Box 677, 1555 255th St.
Sheffield, IA USA 50475-0677

Sukup's Centrifugal Fans & Heaters are designed to provide efficient and reliable aeration and drying. Centrifugal Fans & Heaters can play a big factor in maintaining grain quality, making them key to successful grain handling operations.

Fans are the key to successful drying or aeration systems, which is why Sukup puts great effort into designing and manufacturing the best fans possible. The centrifugal fans from Sukup's grain handling solutions are known for their powerful and efficient airflow. Centrifugal fans are designed for deeper grain depths with high static pressure. These fans are built with heavy-duty, galvanized steel fan housings to resist rust and ensure durability.

Sukup’s Centrifugal Heaters feature advanced safety mechanisms like stainless steel flame sensors, high-limit switches, and pressure relief valves, enhancing their reliability and efficiency. These heaters quickly ignite even at low gas pressures and are designed to operate efficiently up to 6” of static pressure.

Together, Sukup’s Centrifugal Fans & Heaters provide effective aeration and temperature control, critical for preserving the quality and value of grain. All Sukup fans and heaters are factory-tested prior to shipment in order to ensure that producers are getting a top-quality product that works properly from day one. Additionally, Sukup gives you a two-year limited warranty you can depend on.

Standard Features

  • Sukup fan housings, control boxes and motor mounts are made of heavy-duty galvanized steel to resist rust and stand up to the elements
  • Plated screen guard over air intake provides for safe operation
  • Curved, spun inlet venturi improves efficiency
  • Adjustable leveling legs on single inlet fans allow for easy leveling and support while giving more flexibility for adjusting to inconsistencies in concrete pads
  • Exclusive lip easily connects the fan to the heater or transition to form an airtight seal

Centrifugal Fan Blade

  • Sukup’s special airfoil blades move more air due to the backward-curved, non-overloading design
  • Fan wheels are statically and dynamically balanced for smooth, trouble-free operation

Centrifugal Controls

  • Sukup engineers test motor amperage and temperature under long-term, maximum-load conditions to ensure the motors will stand up under tough operating conditions
  • Controls include:
    • Magnetic starter
    • Overload relay
    • Start-stop buttons
    • 115v circuit to interlock heater with fan (7.5 – 50 HP 1750 RPM)
  • Direct motor drive is standard for greater efficiency and less maintenance
  • Integral motor mounts
  • Available models: 1 phase, 230 volt; 3 phase, 230 volt; 3 phase, 460 volt
  • 50 Hz and other voltages available upon request

Sukup Transitions

  • Galvanized steel ensures long life
  • All seams overlap to prevent air leakage
  • Units bolt together easily
  • Special “nutserts” are attached directly to sheet metal, so only one wrench is needed to tighten bolts for assembly

Sukup 3500 RPM Fans

  • Sukup offers a full line of high speed (3500 RPM) centrifugal fans
  • Ideal for deep grain depths, aerating small grains, and in situations where static pressure is high, as in commercial uses
  • Totally enclosed motors

Dual Inlet Fans

  • Dual inlet fans are available for 30 HP, 40 HP, and 50 HP 1750 RPM fans
  • The double-blade design blows away comparable single-blade fans in airflow and efficiency
  • The double inlet pulls air over the motor, completely utilizing motor heat in the process
  • Downstream heaters for dual inlet fans are available for high-capacity in-bin drying
  • Engine-driven dual inlet fans are also available

Centrifugal In-line Fans

  • Sukup In-Line Fans feature a centrifugal fan wheel built into an axial housing
  • 3500 rpm motor is specially engineered for high-performance Sukup blades to ensure maximum airflow
  • Ideal for higher static pressures found with small grains and higher grain depths
  • CSA models available in 18”, 24”, and 28” sizes

Centrifugal Heaters

  • Extensive testing has produced a heater with an intense blue flame, allowing complete, clean combustion in up to 6” of static pressure. Independent tests have shown the Sukup heater burns within the highest efficiency range
  • A coiled vaporizer is available to burn liquid propane where more heat is required, such as in colder climates. Two-way adjustment allows for operation over a wider range of outside temperatures.
  • The exclusive Sukup vaporizer high limit features manual reset, so you will know if the vaporizer needs to be readjusted
  • By placing the heater downstream between the fan and transition, air goes through the fan and then is heated. Because air expands as it is heated, this design gives up to 20% greater drying capacity than a conventional upstream heater placed on the fan inlet.
  • The standard divided control box separates gas and electrical components while protecting them from the elements
  • Sukup heaters feature a special solid-state circuit board for simpler, safer and more trouble-free operation
  • Benefits of Sukup solid-state controls include:
    • The Sukup stainless steel flame sensor is more reliable and will last longer than traditional flame probes
    • Unique, separate transformer produces an aggressive spark for reliable, easy ignition
    • Solid-state circuitry allows additional safety features for greater reliability
    • Circuit board carries a three-year limited warranty
  • Sukup heater housings have a large service door to allow easy access to internal heater components. A sight glass in the top of the housing allows for easy inspection while burning.

Heater Control Options

  • Thermostat cycles burner off and on
  • Modulating valve automatically adjusts gas pressure to maintain constant drying temperature in the bin plenum
  • High-low Thermostat continuous flame cycles between higher and lower gas pressures, providing more uniform temperature with greater reliability; not for low temperature systems
  • Humidistat also available for low-temp and Super Low-Temp models

Product Accessories

  • Optional transitions are available that fit between bin stiffeners
  • Optional hanging kits
  • Dual burner controls with optional gauges allow control of multiple heaters from one control box, ensuring they are cycling on and off together for even heat
  • The deluxe control box includes a static pressure gauge and thermometer, along with the temperature controller
Product Features
  • Huck Bolt Fasteners on Housings
  • Highest Airflows in Industry
  • Leveling Legs To Reduce Vibrations
Justin Louk, Louk Ag Services LLC, Empire Ag LLC


The thing I like the most about working with Sukup is their ability to listen and integrate what the customer would like to see. You know the guys out in the field they’re the ones that really know how this stuff should go together. They implement a lot of ideas that we have.


What are Sukup Centrifugal Fans & Heaters?

Centrifugal fans are used to provide air movement, while heaters raise the air temperature for effective grain drying. They are known for their efficiency and powerful airflow capabilities.

What are the benefits of using Sukup Centrifugal Fans & Heaters?

The main benefits include efficient grain drying and improved air distribution. The heaters can be crucial for faster drying times, especially in cooler climates.

How do Sukup Centrifugal Fans & Heaters contribute to energy efficiency?

Sukup designs these fans and heaters with energy efficiency in mind. They aim to optimize airflow and heating to reduce unnecessary energy consumption while maintaining effective drying.
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