FFI F-Series Tower Dryer


FFI F-Series Tower Dryer

Zimmerman was established in 1963 to build the first modern Tower Dryers. FFI purchased Zimmerman in 1989 and FFI/Zimmerman became a part of the GSI Group, LLC in 2001. All FFI Tower Dryers have their roots in the Zimmerman Tower Design and have been and will continue to be the market leader in grain drying technology.

FFI’s F-Series Tower Dryer design natively allows for easy heat recovery without the uneven heat issues of other designs, as well as a patented self cleaning divider floor and quiet operation with fans located inside the grain column GSI stands behind our FFI products and have the Dealers and Service Techs to ensure your dryer works when you need it. Harvest is a short window of time and you depend on your dryer working, so we know just how important it is.

Key Features

CAPACITIES/HR Up to 7,000 bph Dry & Cool @ 5 pt. removal
Operation Type Dry/Cool
Fuel LP or Natural Gas
Electrical 3 phase
Standard Grain Inverters Standard Vacuum Cool Heat Recovery


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Vision Controls

Vision controls offer simple operation, with an easy-to-read large color graphical touch display. Located on the dryer or remote with a few wires, these controls are designed specifically for FFI grain dryers, giving you unmatched options and settings to get exactly what you need from your dryer control.
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Grain Inverters

Eliminate over-dried grain and maximize drying efficiency and quality by using a GSI’s patented grain inverter. This system inverts all but the outside 2" (50.8 mm) of grain promoting higher test weights, maximum grain quality, and reduced fuel usage. The outside layer of wet grain is dried using the heat which would have otherwise escaped the dryer, keeping your operation energy efficient. A convenient clean-out door provides easy, quick maintenance.

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Static Moisture Sampler

Improve your accuracy with the static moisture sampler. Debris guards ensure a trash-free sample and delivers a uniform representative sample to the test chamber. A blower system gently moves the grain out of the chamber, cleaning it each cycle. Get the most accurate results as the moisture reading used to monitor/calculate discharge grain moisture is only taken while the grain is static and not flowing.

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WatchDog allows you to monitor and control your dryer from anywhere. Monitor and adjust moisture and temperature from your phone, tablet, or computer with ease.​
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Industry Best Emissions Control

Our emissions control features a tapered design to keep particulate in the dryer instead of in the air. Standard small .078” (1.98 mm) perforations are used to retain bees wings and particulate material, while even smaller .0625” (1.59 mm) perforations are used at the critical areas below the Grain Inverters and on the inside of the cooling area. Solid, non-perforated exterior sheets are used at the Grain Inverters and in the discharge section to minimize particulate escape.

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Standard Patented Accu-Trol Metering System

FFI's field proven Accu-Trol is self cleaning and has UHMW in all contact areas for lower horse power demand and extreme life. Grain travels a short distance with no damage on a standard stainless steel floor with a VFD drive for accurate dependable operation. Customize your system with an optional integrated discharge auger for direct delivery of the grain to a bucket elevator.
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Tower Dryer Heat Reclaimer

GSI’s patented (US Patent No. 9,863,703) Heat Reclaimer technology is the first of its kind, giving you the ability to reuse the dryer’s heat, while minimizing debris build-up. The GSI Heat Reclaimer separates the hot, dry air and returns it into the drying process again, while simultaneously taking the cold, wet air and debris and discarding it via the open bottom.


One size does not fit all when it comes to drying grain, and that’s why FFI features a complete lineup of grain dryers. With the ability to dry in or out of bin, batch or continuous flow we have the dryer to fit your needs and maximize your profitability.

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