Have you ever wondered how a food dehydrator works? It’s a fascinating piece of kitchen equipment that can turn fresh fruits, vegetables, and even meat into delicious and nutritious snacks. In this article, we’ll take a closer look at how food dehydrators work and how you can use them to create your own homemade treats.

When you place your food in a dehydrator, the machine uses a low heat and gentle airflow to slowly remove the moisture from the food. This process preserves the food, making it last much longer than if it were left out in the open. The heat and air circulation work together to create the perfect conditions for drying the food, without cooking it.

One of the key features of a food dehydrator is its adjustable temperature control. This allows you to set the dehydrator to the optimal temperature for each type of food you’re drying. Fruits typically require a lower temperature, around 130°F (54°C), while meat and vegetables need a slightly higher temperature of around 160°F (71°C). The length of time it takes for the food to dry will depend on the temperature setting and the moisture content of the food.

In the next part of this article, we’ll dive deeper into the process of food dehydration and explore some tips and tricks for getting the best results with your dehydrator. So, if you’re curious about how to make your own dried snacks or interested in preserving food for longer shelf life, keep reading to learn more.


Have you ever wondered how you can extend the shelf life of your favorite fruits, vegetables, and even meats? Look no further than a food dehydrator! This handy kitchen appliance is designed to remove the moisture from food, preserving its nutritional value, enhancing its shelf life, and reducing food waste. In this article, we will take a closer look at the components of a food dehydrator, the process of food dehydration, the role of heat and airflow, the benefits of using a food dehydrator, the types of food that can be dehydrated, tips for using a food dehydrator, and common troubleshooting issues.

What is a food dehydrator?


A food dehydrator is an electrical appliance that removes moisture from various types of food, allowing them to be stored for longer periods without spoiling. It works by using a heating element, a fan, and air vents to circulate hot air around the food, effectively drying it out.

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The main purpose of a food dehydrator is to remove moisture from food, which inhibits the growth of bacteria, mold, and yeast. By doing so, the dehydrator extends the shelf life of the food and preserves its nutritional value. Additionally, dehydrating food reduces its size and weight, making it easier to store and transport.

Components of a food dehydrator

Heating element

The heating element in a food dehydrator is responsible for generating heat. It is usually located at the bottom or the back of the unit and is either an electric coil or a infrared heating element. When the dehydrator is turned on, the heating element begins to warm up, creating the hot air needed for the dehydration process.


The fan in a food dehydrator is responsible for circulating the hot air around the food. It is typically located at the back of the unit, behind the heating element. As the fan rotates, it blows the hot air across the food, ensuring that it dries evenly on all sides.

Air vents

Air vents are strategically placed throughout the food dehydrator to allow the hot air to circulate properly. These vents are often adjustable, allowing you to control the airflow and temperature inside the dehydrator. By adjusting the vents, you can ensure that the food is dehydrated at the optimal temperature and speed.


Food dehydrators come with trays that are used to hold the food during the dehydration process. These trays are usually made of plastic or metal and are stackable, allowing you to dehydrate multiple batches of food at once. The trays have small holes or slots to allow the hot air to flow through and evenly dry the food.

Process of food dehydration

Preparing the food

Before you start dehydrating your food, it is important to prepare it properly. Wash and peel the fruits and vegetables, remove any seeds or pits, and pat them dry. For meats, trim off any excess fat and slice the meat into thin, uniform pieces. By preparing the food in this way, you ensure that it dehydrates evenly and efficiently.

Arranging the food on trays

Once the food is prepared, arrange it in a single layer on the trays of the food dehydrator. Make sure that the pieces of food are not touching each other, as this can prevent the hot air from circulating properly. If you are dehydrating different types of food at the same time, make sure to separate them on different trays to prevent flavors from mixing.

Setting the temperature

Most food dehydrators have a temperature control knob or digital display that allows you to adjust the temperature. Different types of food require different temperatures for optimal dehydration. Fruits and vegetables typically need a lower temperature, around 130°F (54°C), while meats and jerky require a higher temperature, around 160°F (71°C). Refer to the food dehydrator’s manual or a dehydration guide for specific temperature recommendations.

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Setting the timer

Some food dehydrators have a built-in timer that allows you to set the drying time. If your dehydrator does not have a timer, use a kitchen timer or set an alarm to remind yourself to check on the food. The drying time can vary depending on the type and thickness of the food, as well as the desired level of dehydration.

Turning on the dehydrator

Once you have set the temperature and timer, it’s time to turn on the food dehydrator. The heating element will start to generate heat, and the fan will begin to circulate the hot air. Make sure that the air vents are not blocked and that the trays are properly positioned inside the dehydrator.

The role of heat and airflow

Heat distribution

The heat generated by the heating element is essential for removing moisture from the food. As the hot air circulates around the food, it causes the water molecules in the food to evaporate. The heat distribution ensures that all parts of the food are exposed to the drying process, resulting in even dehydration.

Air circulation

The role of the fan in a food dehydrator is to ensure proper air circulation. The fan blows the hot air across the food, helping to speed up the drying process. As the hot air circulates, it also carries away the moisture released from the food. Without proper air circulation, the food may not dry evenly, leading to potential spoilage.

Benefits of using a food dehydrator

Preserving nutritional value

One of the key benefits of using a food dehydrator is that it preserves the nutritional value of the food. Unlike other preservation methods that may involve high temperatures or chemicals, dehydration gently removes the moisture from the food while retaining its natural vitamins, minerals, and enzymes. Dehydrated fruits and vegetables can be a nutritious snack or a flavorful addition to various recipes.

Enhancing shelf life

Dehydrating food significantly extends its shelf life. By removing the moisture, the growth of bacteria, mold, and yeast is inhibited, preventing spoilage. Dehydrated food can be stored in airtight containers or vacuum-sealed bags for months or even years, depending on the type and the storage conditions. This makes it an ideal option for emergency food supplies or for preserving seasonal produce.

Reducing food waste

Food waste is a significant issue globally. By dehydrating excess fruits, vegetables, or meats, you can prevent them from going to waste. Dehydrating allows you to use up surplus produce and store it for future use. It also reduces the need for refrigeration or freezing, freeing up valuable space and saving energy.

Types of food that can be dehydrated


Fruits are one of the most popular types of food to be dehydrated. Apples, bananas, berries, and mangoes are just a few examples of fruits that can be dried. Dehydrated fruits make for healthy, portable snacks that can be enjoyed year-round.

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Vegetables can also be dehydrated and used in soups, stews, or as a standalone snack. Common dehydrated vegetables include tomatoes, peppers, carrots, and mushrooms. Dehydrating vegetables not only extends their shelf life but also concentrates their flavors.

Meat and jerky

Dehydrating meat, such as beef or poultry, can result in delicious jerky. Jerky is a popular snack that is easy to carry and can be enjoyed on-the-go. It is important to follow food safety guidelines when dehydrating meat to ensure that it is properly cooked and safe to eat.

Herbs and spices

Dehydrating herbs and spices intensifies their flavors and allows them to be stored for longer periods. Herbs like basil, oregano, parsley, and thyme can be dried and used in various culinary creations. Dehydrated spices, such as chili flakes or garlic powder, add a punch to any dish.

Tips for using a food dehydrator

Slice the food evenly

To ensure even drying, it is important to slice the food into uniform pieces. This will ensure that all the pieces dry at the same rate. Use a sharp knife or a mandoline slicer to achieve consistent thickness.

Rotate trays during dehydration

If you are dehydrating multiple trays of food at once, rotate the trays periodically during the dehydration process. This will help to ensure that all the food is drying evenly. If you notice that some areas are drying faster than others, you can switch the trays’ positions.

Monitor the drying time

Different types of food require different drying times. It is important to monitor the food regularly to prevent over-drying or under-drying. Check the food’s progress by touching it or breaking a piece in half. It should be leathery but not brittle.

Store properly

Once the food is fully dehydrated, allow it to cool completely before storing it. Store the dehydrated food in airtight containers, such as glass jars or vacuum-sealed bags, in a cool, dry place. Proper storage will help to maintain the quality and flavor of the dehydrated food.

Common troubleshooting issues

Uneven drying

If you notice that some pieces of food are drying faster than others, it may be due to uneven air circulation. Make sure that the food is spread out evenly on the trays and that the air vents are not blocked. If necessary, rotate the trays during the dehydration process.

Sticky or leathery texture

If the dehydrated food has a sticky or leathery texture, it may have been over-dehydrated. This can happen if the temperature was set too high or if the food was left in the dehydrator for too long. Adjust the temperature and drying time accordingly for future batches.

Over-drying or under-drying

Over-drying or under-drying can occur if the temperature or drying time is not properly regulated. If the food is over-dried, it may become brittle and lose its flavor. If it is under-dried, it may spoil quickly. Adjust the temperature and drying time based on the specific type of food you are dehydrating.


A food dehydrator is a versatile kitchen appliance that can be used to preserve and enhance the shelf life of various types of food. By gently removing moisture through heat and airflow, a food dehydrator allows you to enjoy nutritious and flavorful snacks and extend the lifespan of your favorite fruits, vegetables, meats, and spices. Whether you are a health-conscious individual looking for a convenient way to enjoy dried fruits and vegetables, or a home cook wanting to experiment with homemade jerky and dehydrated herbs, a food dehydrator is a must-have appliance for any kitchen. So why not give it a try and explore the world of dehydrated food today?

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By Chris Wright

My goals with PreppingSurvival.com are to help you prepare your family for every day life as well as the things that pop up like job loss, storm damage, store shortages, etc. The better prepared you are for life, the easier survival becomes. Learn to thrive, not just survive!