Our way for drying

is special.
More fast. More reliable. More gentle. More safe.

Reliable and gentle drying

Food and pet food are delicate goods requiring optimum processing. Product integrity and safety have top priority in the drying process.

Our integrated heat pump system with its constant process parameters ensures reliable drying while low temperatures warrant gentle drying of your products. The closed system produces good results in terms of appearance, aroma and bioactivity.

The heat pump based condensation drying technology implemented in our Airgenex®food dryer is the optimum answer to your drying needs.

On the following pages, you may find advantages of our food dryers, how they work and where they are applied.

Your Benefits

Low temperatures

Heat pump based condensation drying is capable of drying your products at temperatures variable between 20 °C and 75 °C. Temperatures up to 100 °C may be selected. Using low temperatures is a gentle way of drying your food. Drying is absolutely stress-free for your product.

Reliable and Efficient

Airgenex®food dryers ensure high efficiency of the drying process. Heat pump technology is used for air dehumidification. The drying operation is reliable and stabilizes your production process, thus contributing to optimizing the process.

Always the Suitable Drying Solution

Many years of experience in and know-how of many hundreds of drying applications ensure that you get the solutions exactly suiting your product and your production process. This is the only way to success for you, the customer, and us, the supplier.

Valuable Condensate

Projects realized so far have shown that the condensates obtained may contain volatile aromas and flavours. Harter’s condensation drying always puts you in a position to recycle the valuable condensate or its ingredients.

Closed system

HARTER drying systems are basically closed – no interchange with ambient air and, thus, no dependence from the climate. This helps to achieve positive results in terms of bioactivity, aromas and appearance. Sulphurization or addition of ascorbic acid to retain colour, for example, is not required. The dried products do not require any additional flavouring.

Less time, less energy

Compared with exhaust air dryers and conventional fan-based systems, our Airgenex®food dryers require much less time for drying, which is, of course, dependent upon the drying temperature and the texture of the product to be dried. This is achieved by using the alternative physical approach of heat pump based condensation drying. Optimum air conditioning and air routeing ensure energy and, thus, cost savings.

Combining Drying and Cooling

Our dryers may be easily modified for additional cooling if desired or required by the process. Quite a few combined drying-cooling systems are already in operation. We will also be happy to elaborate energy efficiency concepts, for example to return waste energy from cooling into other processes in your company.

Drying Systems for Food

We develop, design and manufacture drying systems both for batch and continuous operation. Our technology is modified to meet your specifications. All drying related parameters for your specific application are determined by prior tests in our pilot plant station.

For drying to be successful, a perfect match of air dehumidification and air routeing is required. Extremely dry, unsaturated air, at low temperatures, is routed exactly to the place where humidity is to be absorbed. This process – our heat pump based condensation drying – is applied in various types of system designs. Our drying systems are made of stainless steel and can be cleaned in compliance with applicable food standards. We shall be pleased to meet your specific hygienic design requirements. Just contact us!

Is your application different from above?

You will certainly understand that we cannot possibly list all our drying solutions here. If your application is not covered above, please contact us. We shall be pleased to offer non-committal consultation!


With our energy-saving drying systems, you can gently dry almost all types of food.

Do you have a different product to the examples below? We are an innovative team and look forward to new tasks. Have your product tested in our Pilot Plant Station without obligation. Contact us – we will be happy to advise you without obligation!

Fruits & Vegetables

are gently dried at the desired / optimum temperature, which is normally between 35 °C and 65 °C.


are dried at temperatures below 42 °C to preserve vitamins and protein structures. This way, crudités actually remain in an uncooked state – with all its benefits for your special product idea.

Gentle drying of nuts | HARTER drying solutions
Shell Nuts

We minimise the residual humidity in the relatively dry nuts either to best prepare them for grinding or to enhance their shelf life.

Germed Seeds

Our gentle drying helps to preserve or condition your germed seeds for further processing.

Ungermed Seeds

Gentle drying of bulk material such as seeds is one of our specialties. We do this by drying in a barrel with minimum intermittent movement or by drying in a tray trolley dryer. Our customized air routeing system always ensures uniform drying.

Grasses & Herbs

Our gentle low temperature drying helps to best manufacture your products. Applications are manifold and individual. So are our drying solutions.

Meat & Sausages

Do you wish to create a new snack? Sausage chips, salami chips, ham chips or dried meat, meat chips, beef jerky or any other odd idea – taking us as your technology partner will be a large step towards advancing your plan!

Digested Residue & Pomace

Do you need a drying system for a planned up-cycle product? We can help you develop a new valuable product from what seems to be waste material.

Feed / Pet Food

Are you looking for a low temperature drying system to preserve valuable ingredients in your products? Or do you want to find a system to make your product sterile so that you need higher temperatures? We can offer solutions to meet any challenge!

Packaged Food

For details of drying packaged food click here.

The Process

Extremely dry process air at the right place: A nifty combination of air conditioning and air routeing ensures efficient and high quality drying results.

Pilot Plant Station

Our Pilot Plant Station – One of our special features.

You want to have your food tested for drying response? Welcome!

You let us know your wishes and requirements, and we will conduct the necessary tests on your products. We will determine and record the parameters relevant for satisfactory drying. Pleasant surprises may be expected as far as aroma, taste, ingredients and appearance is concerned.

You are very welcome to witness these tests and see the results for yourselves.

Equipment available for any application
Our H01 and H01compact model dryers are designed for flexible use in series of tests.
On-site testing.
Under special circumstances, we can also offer loan units for drying tests at your premises. One of our engineers will instruct you on how to run your own tests.

Temperature range20 °C bis 75 °C20 °C bis 75 °C
Single layer dryingTrays of various sizes and designs may be used.
Usable surface area48 m² max.12 m² max.
Bulk materialPans and baskets in various sizes and designs can be used. Maximum fill height is 175 mm.
Usable volume1,00 m³ max.0,2 m³ max.

Creative in dealing with challenges
You have a different or more extensive task for us? Let’s go! After consultation, we also produce test set-ups on a larger scale. We then incorporate the analyses and results directly into our planning or production and implement them accordingly.

What can we do for you?

Are you interested in our solutions for drying of food?
Are you interested in our solutions for drying of food?

Contact us. Our technical sales team will be happy to provide you with initial information:

+49 (0) 83 83 / 92 23 11 | info@harter-gmbh.de

Are you already using a drying system from HARTER and have questions? Do you have any questions regarding maintenance, spare parts service or repairs?
Are you already using a drying system from HARTER and have questions? Do you have any questions regarding maintenance, spare parts service or repairs?

Then Yasmin Keckeisen and Lisa Reichart will be happy to assist you in our after-sales service:

+49 (0) 83 83 / 92 23 20   |   ass@harter-gmbh.de

We are there for you by phone from Monday to Thursday from 8 a.m. to 12 p.m. and 1 p.m. to 4.30 p.m. and Friday from 8 a.m. to 2 p.m.

Would you like to find out more about our products and our company?
Would you like to find out more about our products and our company?

Find our brochures, technical reports on our projects and reports in the trade press here.

These Companies

trust in us

We have successfully installed more than 1000 drying systems to date. Here is a small selection of references.

Green Fox
Oyster Mushrooms