Food dehydrators and freeze dryers both preserve food, but they use different methods to do so. Here’s a complete guide to how they differ.
What Is a Food Dehydrator?
A food dehydrator reduces the water content in food to around 10% or less by circulating warm air around it. This process gradually dries the food out and stops bacteria and mold from growing. Minimal moisture means the food will have a longer shelf life.
They typically have several stackable trays with an adjustable temperature dial. They can be used for fruits, vegetables, meats, and herbs.
Key Features of a Food Dehydrator:
- They typically operate between 95°F and 165°F.
- They dehydrate foods fully in 4 to 24 hours.
- Perfect for making dried fruits, vegetables, jerky, and herbs.
- They cost between $50 and $300.
What Is a Freeze Dryer?
A freeze dryer is a more advanced appliance that preserves food by removing moisture through a process called sublimation. This involves freezing the food first and then using a vacuum to extract the water as vapor. It removed almost 99% of the moisture content. This method results in food that is extremely lightweight and shelf-stable for up to 25 years when stored correctly.
They’re often used for emergency food supplies or space missions. You can use them to preserve fruits, vegetables, dairy products, full meals, and even desserts. They’re also great for preserving things like raw meat or eggs, soups, yogurts, or ice cream.
Key Features of a Freeze Dryer:
- It operates at extremely low temperatures, often below -30°F.
- It takes 20 to 40 hours to complete a batch.
- Ideal for preserving fruits, vegetables, dairy, meats, and even entire meals.
- They’re expensive, typically starting at $2,000 and going up to $5,000 or more.
The Difference Between a Dehydrator and a Freeze Dryer
| Feature | Food Dehydrator | Freeze Dryer |
| Moisture Content | Retains about 10% moisture | Removes 99% of moisture |
| Shelf Life | 1–2 years | Up to 25 years |
| Texture | Chewy or leathery | Light and crisp |
| Nutritional Retention | Good | Excellent |
| Processing Time | 4–24 hours | 20–40 hours |
| Cost | Affordable | Expensive |
Are freeze dryers worth the cost?
If you want long-term food storage or need to preserve a wide variety of foods, they’re worth it. Otherwise, a dehydrator is more affordable and practical for everyday use.
Do freeze dryers or dehydrators use more energy?
Freeze dryers use more energy because of the freezing and vacuum process. Dehydrators are generally more energy-efficient.
Can I make jerky with a freeze dryer?
No, jerky needs heat to cook and dehydrate the meat, so a dehydrator is the better option for that.
Which one is easier to use?
Dehydrators are simpler and more beginner-friendly. Freeze dryers require more setup and maintenance.
When should you use a dehydrator?
A food dehydrator is best for casual food preservation like for making snacks. It’s also ideal if you’re new to food preservation and don’t want to invest a lot of money.
When should you use a freeze dryer?
A freeze dryer is perfect if you’re into long-term food storage. It’s especially popular among preppers, outdoor enthusiasts, camping, backpacking, and anyone looking to preserve food for emergencies.
Summary
Food dehydrators and freeze dryers both preserve food, but they work in completely different ways. Dehydrators are perfect for quick and affordable preservation of fruits, veggies, and snacks. Freeze dryers are ideal for long-term storage and foods with high water content.
Looking for an easy way to make healthy snacks at home? The MisterChef Food Dehydrator is perfect for drying fruits, veggies, herbs, and even making your own jerky! Shop with us today.