Tolsma-Grisnich develops and produces AC and EC fans specially designed for potato, onion and carrot storage. Our fans last longer, are quieter and are the most energy efficient in the world.

AC fans: the proven quality standard in storage fans.

High-efficiency: AC fans have 9 or 12 lightweight blades

Easy to install and maintain: enclosed, high-quality motor with maintenance-free bearings Service: developed, produced and serviced by Tolsma

EC fans: energy-friendly ventilation using the newest generation of direct current motors.

Energy saving: 20% lower power consumption; 50% less power consumed at 80% rotational speed Easy to use: standard speed control

Efficient design: latest generation of direct current motors

Easy to install and maintain

Air Ducts
Quadro Air-Mix Units

Storage Equipment


  • Fans
  • Air Ducts
  • Quadro Air-Mix Units


  • Refrigeration System
  • Quadro Compact Cooler

Control Technology

  • Vision Control
  • Tolsma Measurment Unit (TMU)
  • Control Panels
  • Yield Observation Unit (YOU)

Processing Equipment


  • Storage Bunkers
  • Box Handling
  • Unloading
  • Transport
  • Fall Breaker

Dry Cleaning

  • Samro stone and clod separator

Wet Cleaning

  • Stone, clod and haulm separator
  • Separation baths
  • Washer
  • Roller Dryer
  • Combi-washer

Sorting + Grading

System Solutions

Storage Design

  • Box
  • Bulk

Total Solutions