Warm air drying

Chamber or convection drying: heated air passes around the product and carries away moisture. The mode can be adjusted to suit the raw material and the desired shape.

How it works

Heating provides evaporation, and ventilation removes moist air. Temperature, slice thickness, load and air movement together determine the drying progress.

History

From seasonal harvesting to drying

Modern dehydrators allow you to dry food all year round. The heater, fan and trays make the process less dependent on outside weather.

Various air supply options

NCHFP describes the horizontal and vertical movement of air in residential dryers. This shows why the design and distribution of the product is more important than the word dehydrator.

What changes in the product

From flexible slice to dry crumb

Fruits often remain flexible after drying, and some vegetables remain fragile. The degree of dryness and cutting changes the application: filling, compote, powder or snack.

External drying heating too fast

If overheated, the surface may harden before the middle. Therefore, a nice dry outer layer is not a substitute for checking the doneness of the entire batch.

Taste and color

Pre-treatment helps limit darkening; Some of the changes are related to the heating itself. Blanching or sulfitation are separate operations; information about them should be found in the composition and description.

Pros

• Temperature and air movement are adjustable.
• Work is possible regardless of the sun and season.
• Suitable for different sizes and shapes of food raw materials.
• Convenient for ingredients that are then soaked or cooked.

Limitations

• Requires energy for heating and ventilation.
• Overheating and uneven loading worsen the result.
• Drying is not the same as roasting; the word "chips" also does not indicate whether the product was fried in oil.

Where is it used?

• Fruit slices and halves.
• Vegetable pieces.
• Fruit leaves and puree pastilles.

When to choose

• Convenient cutting and predictable use in the recipe are important.
• You need an ingredient for compote, baking or chopping.

When to choose another option

• The airy crunch of a freeze-dried berry is expected without trying a sample.
• Instead of markings, the seller suggests focusing only on color.

What to know before buying

• Was it roasted or fried in oil after drying?
• Are there sugars, syrups, preservatives or antioxidants?
• Should the slices be floppy or crispy?
• Is any preparation necessary before adding to a dish?