FDG Indirect Gas-Fired

FDG-Series Indirect Gas-Fired Dehydrators

In the world of industrial drying and dehydrating systems, the choice between indirect gas-fired dehydrators and conventional direct-fired systems is a pivotal decision that can significantly impact process efficiency, product quality, and safety. Indirect gas-fired dehydrators, which employ a heat exchanger to separate the combustion process from the product load, offer numerous advantages over their direct-fired counterparts.

Nyle's FDG Indirect Gas-Fired dehydrators includes a burner assembly, an insulated drying chamber, air handling components, and PLC-based electrical controls with an operator screen to create the perfect conditions to dry your products.

Product Documents

    Benefits of Indirect Gas-Fired Systems

  • Improved Product Quality: Indirect gas-fired dehydrators excel in preserving product quality. In this system, the product load is never exposed to the byproducts of combustion. The heat exchanger, typically a radiant tube, heats the air, which is then gently circulated over the product. This indirect heat transfer method eliminates the risk of contamination and maintains the integrity of the product. In direct-fired systems, the product load comes into contact with recirculated air-containing combustion byproducts, potentially compromising the quality and safety of the final product.

  • Enhanced Safety: Safety is paramount in industrial operations. Indirect gas-fired dehydrators provide a clear advantage by safely venting combustion byproducts to the atmosphere through a chimney system. This design minimizes the risk of harmful gases, such as carbon monoxide, entering the workspace. In direct-fired systems, byproducts are recirculated within the drying chamber, increasing the potential for workplace hazards.

  • Energy Efficiency: Indirect gas-fired dehydrators are more energy-efficient than their direct-fired counterparts. By separating the combustion process from the product load, less energy is wasted. Heat is transferred directly to the air, resulting in faster and more efficient drying, ultimately saving on fuel costs. In direct-fired systems, energy efficiency is compromised as the combustion process and product drying are intertwined, leading to heat loss and higher operating expenses.

  • Greater Flexibility: Indirect gas-fired dehydrators offer increased flexibility in temperature control. The separation of combustion and product load allows for precise control over the drying process. Operators can easily adjust temperatures without the risk of overheating or negatively affecting product quality. In direct-fired systems, adjusting temperatures can be more challenging, as changes in combustion directly impact the product environment.

Product Model


Burner Output: 800,000 BTU/h
Load Capacity: 18 Racks, 360 Trays, 1,170 sq ft
Loading Space: 15’ 2” D x 5’ 7” L x 6’ 0” H
Total Footprint: 25’ 0” D x 6’ 3” L x 11’ 0” H
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How Nyle's FDG Indirect Gas-Fired Dehydrators Work

The burner directs the combustible process into a radiant tube which acts as a heat exchanger. Air passing over the tube is heated before coming into contact with the product load. The by-products of combustion pass through the tube and is vented to the atmosphere through the chimney system, unlike a direct-fired system, which circulates the by-products of combustion through the product load.


Nyle Systems FDG-Series Indirect Gas-Fired series controllers are the best in the industry. Each unit comes with an intuitive touchscreen controller programmed with flexible drying scheduling software. Drying schedules can be saved and modified as necessary and remote access is available as long as there is an internet access point.

High Quality 
& Efficient Dehydrators 

High Quality & Efficient Dehydrators 

12 Stevens Rd,
Brewer ME, 04412
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