• The Helfer duct rocket penetrates the center of the bin to release air into the core
• Fan efficiency is increased by as much as 20%
• Static pressure is lowered
• Drying time is reduced by as much as 50%
• 15" round floor ducts push air up from the floor and out towards the bin walls

All of the systems below come standard with a 48" Helfer duct. Add 24" or 48" extension for all tall bins.

Wall Vents

• Reduce static pressure
• Maximize air flow
• Reduce drying time by eliminating moisture movement to the top of the bin
• Easily opened and closed from ground level with a unique rope system
• Can be used to enhance other aeration systems
• 3 vents per bin recommended (18' diameter or larger)