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Gentle drying is crucial in many industries today for product quality and cost-effectiveness. Whether it’s food, pharmaceuticals, electroplating, or environmental technology – wherever temperature, humidity, and time must be precisely coordinated, heat pump drying from HARTER offers the ideal solution.
The process combines precise process control, high energy efficiency, and hygienic exhaust air-free operation.
HARTER demonstrates how individual systems are developed: This is how solutions for heat pump dryers are created.
The physical principles of the technology are described in: Energy-saving drying with heat pump.
Do you require a custom solution and/or would you like to test the drying process beforehand?
Development with practical tests in our in-house development center
We are an innovation-driven team and welcome new challenges. HARTER tests your custom solution in the technical center under realistic conditions, optimizes the parameters, and documents the results transparently. Please contact us – we would be pleased to provide you with a non-binding consultation!
Drying systems
in over 20 countries stand for our quality
Employees
from all areas ensure a high level of vertical integration
Years of experience
in the development of innovative drying systems
Gentle drying – Principle and advantages of heat pump technology
With gentle drying, the focus is on maintaining the product structure. Temperature, air volume, and humidity are regulated so that sensitive materials dry evenly without undergoing chemical or physical changes.
The HARTER principle:
- Closed air circuit → no exhaust air, no energy loss
- Precise dehumidification → constant, dry process air
- Gentle heating → controlled temperatures between 30 °C and 75 °C
Your Benefits:
- Constant quality through reproducible process parameters
- Preservation of aromas, colors, and structures
- Up to 70% energy savings compared to hot air processes
- Exhaust air-free, hygienic process
- Stable residual moisture levels with low energy input
The combination of heat pump, dehumidification, and air circulation ensures controlled conditions – regardless of the ambient air. This results in even drying down to the core – without dehydration or surface hardening.
gentle drying systems
Gentle drying – Applications and product examples
Gentle drying plays a key role in almost all industries. HARTER develops systems that are precisely tailored to the product, industry, and production environment.
Typical Application Areas:
- Food industry: Fruits, vegetables, herbs, meat and protein products
- Pharmaceuticals and chemicals: Powders, granules, active ingredients
- Surface technology: Adhesion water drying, electroplating, cleaning
- Environmental technology: Sludge, filter cakes, secondary raw materials
- Material processing: Plastics, components, paint carriers
System variants:
- Chamber dryer / tray dryer for flexible batches
- Belt dryer for continuous processes
- Special systems for special geometries or cleanroom conditions
Each system is tested and adapted in the company’s own technical center. There, HARTER uses your original products to determine the optimal parameters – temperature, air flow, bed depth, and target residual moisture – and documents them for series operation.
Further applications and references can be found under: Industries.
We dry with dry air and deliver it to the right places: A perfect interplay of air preparation and air guidance provides you with the best possible drying result.
Reliable – Competent – Long-term
Service that thinks ahead – for years to come
With the HARTER After-Sales Service, you secure a reliable and efficient drying solution for the long term. Whether it’s maintenance, spare parts supply, or technical adjustments – we support your system throughout its entire life cycle and ensure that it delivers optimal results at all times.
Gentle drying – Sustainability, economy and future security
The heat pump technology from HARTER enables energy-saving processes without waste heat loss. The drying process is completely exhaust air-free and low-emission – an advantage for the environment and operating costs.
Sustainable advantages:
- Up to 70% energy savings
- Reduced CO₂ emissions through heat recovery
- No exhaust air or filter systems required
- Long service life thanks to robust technology
- Eligible for funding through energy and environmental programs
The systems have a modular design and can be easily integrated into existing production lines. Process monitoring, data logging, and remote maintenance are optionally available – ideal for automated quality and energy audits.
HARTER demonstrates how practical concepts are developed from requirements: This is how solutions for heat pump dryers are created.
What our customers say
“Sometimes it is better to say nothing and let your customers speak for themselves.”
– Regina Mader, Managing Director
FAQ – Frequently asked questions about gentle drying
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Brochures, technical reports, and press articles for those who want to know more details.
