New Macrowave Express-Series Dryers Reduce Water Activity and Carbon Emissions

Press Release Summary:

The Macrowave™ Express-Series RF Post-Baking Dryers are combined with hot-air impingement and radio frequency drying. The unit is suitable for processing bedded products like cereals, snack mixes, seeds, spices and granular blends. The Macrowave dryers eliminate the need for product checking and deliver 40% increased energy efficiency over conventional gas-fired drying systems.

Original Press Release:

Introducing a Revolutionary New Type of Drying System to the Food Industry

Radio Frequency Company, a decades long leader in the production of RF Post-Baking Dryers, has now combined the attributes of both hot-air impingement together with radio frequency drying for a new hybridized system, available across a broad range of sizes and output capacities. 

The New Macrowave™ Express-Series increases drying efficiency and line productivity, while at the same time reducing water activity and carbon emissions, and eliminating product checking. Excellent for the processing of bedded products such as cereals, snack mixes, seeds, spices and granular blends, these new systems have demonstrated a 40% increase in energy efficiency over conventional gas-fired drying systems.

When exposed to RF energy, a product will heat throughout its entire thickness, evaporating moisture in-situ, and force the escaping vapor to the product’s surface. There the vapor is rapidly swept away by the impinged hot air leaving the product uniformly dry throughout its thickness. This moisture uniformity naturally creates a product with low water activity, eliminating checking and surface cracks sometimes created by hot air alone. 

By eliminating the time it takes for conventional hot air to reach the interior portions of a product, or product bed-depth, conventional drying times are greatly reduced, along with the excessive carbon emissions associated with prolonged conventional drying times.

Product sample testing is available at RFC’s food drying laboratory located in Millis, MA. To arrange a test for your products, please contact Lisa Mitchell at 508.376.9555 or

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