Drying time and temperature
Dehydrator temperatures and drying times
Food safety sets the temperature; slice thickness, humidity and tray loading set the time.
Updated:
The short answer
Dry herbs at 45 °C for 1–4 hours, fruit, vegetables and fruit leather at 60 °C until done, meat jerky at 60 °C for 5–6 hours after preheating to 71 °C (poultry to 74 °C), and fish at 65 °C for at least 4 hours after preheating to 71 °C. Judge doneness by the food's condition, not by the timer alone.
What decides the time
Slice thickness, sugar and moisture content, kitchen temperature and humidity and how densely the trays are loaded all affect the duration. A single layer with no overlap and unobstructed air openings is the main condition for an even result.
Herbs and greens: 45 °C
Leaves and stems are dried at a low temperature to keep their aroma: 45 °C for 1 to 4 hours depending on thickness. Finished leaves crumble and stems snap; store herbs in paper bags or sealed jars in a cool, dark, dry place.
Fruit, vegetables, fruit leather: 60 °C
WetAir recipes dry fruit and vegetables at 60 °C. Judge doneness after cooling: fruit slices become pliable with no moist spots, vegetables turn brittle, fruit leather peels off the sheet easily. Thin garlic slices dry in about 2–3 hours; juicy fruit takes much longer.
Meat and poultry: safety first
Jerky is made from slices up to 6 mm thick. Before drying, meat is heated to 71 °C and poultry to 74 °C, and only then dried at 60 °C for 5–6 hours. A cooled strip should bend and crack but not break, with no moist spots inside.
Fish: 65 °C
Fish jerky is dried at 65 °C for at least 4 hours after preheating to 71 °C. Use only fresh fish, keep it refrigerated until loading and dry it separately from other foods so juices and odour do not transfer to neighbouring trays.
What the dehydrator can do
WFD-K1000S has a heater with a large-diameter fan, sets the temperature in 5 °C steps between 35 and 75 °C and has a timer up to 24 hours; the display shows END when finished. The six steel trays of WFD-K650S with a fruit-leather sheet and a fine mesh for berries suit smaller batches. Put juicy foods on the lower levels so drips do not reach the trays beneath.
Loading checklist
- Cut the food into even pieces of the same thickness.
- Spread it in a single layer without blocking the air openings.
- Set the temperature by food type: 45, 60 or 65 °C.
- For meat and fish preheat to 71 or 74 °C first.
- Check doneness after cooling and pack only cold food.
Common mistakes
- Raising the temperature to speed up herbs or fruit leather.
- Drying meat without preheating.
- Loading wet food densely and in several layers.
- Packing warm food — condensation will form in the jar.
Models to compare
WetAir manuals and support
Check the exact model requirements
If the dehydrator does not hold its temperature or the timer ends early, check the air openings and the tray loading, then contact WetAir service.
Sources and verification
Temperatures and times come from the WetAir recipes, which rest on USDA FSIS, Penn State and NCHFP guidance, and from the WFD-K1000S and WFD-K650S manuals. No fixed time is set for fruit and vegetables — go by doneness.
Frequently asked questions
Why do the recipes give no exact time for apples?
Time depends on the variety, thickness and kitchen humidity; checking doneness after cooling is more reliable than a fixed figure.
Can meat be dried at 45 °C to keep it juicy?
No. Without preheating to 71 °C and drying at 60 °C the product is not safe.
How should dried food be stored?
Cool completely, pack airtight and keep in a dry, dark place; jerky goes in the refrigerator or freezer. If moisture appears inside, dry it again.