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Energy saving potentials through heat utilisation and heat recovery

Use the heat that is generated during the production of compressed air.


 Simply save energy and benefit financially quickly!


The energy consumed for compressed air generation is almost completely converted into heat.
A high energy-saving potential - after all, a compressed air station with a power requirement of 75 kW, for example, consumes approx. 300,000 kWh of electricity annually for 4,000 operating hours.

Use this energy - in the form of:

  • Hot air to support space heating
  • Hot water to support central heating
  • Hot water for domestic use

How big are your savings potentials?

Example applications for profitable heat utilisation

 Compressor heat utilisation for space heating

Warm air for space heating

The heated cooling air is used for room heating via a duct system. A controlled, adjustable room temperature is achieved by temperature-controlled dampers.
In winter, the heat of the extract air is used completely or partially for heating purposes.
In summer, it is blown outdoors via an exhaust air duct.

Possible temperature level: 20-25 K above ambient temperature.

 Compressor heat utilisation for hot water

Hot water for heating purposes

Plate heat exchangers are used for heating water preparation. The heating water is guided through "plates" in a closed jacket.
The hot compressor oil flows between the plates and the jacket and transfers its thermal energy to the heating water.

Possible hot water temperature: up to 70° C

Compressor heat utilisation for industrial process water

Heat for process water

The heat recovery process is the same as for heating water. The use of safety heat exchangers prevents the oil from entering the domestic hot water even if there are leaks.

Possible domestic hot water temperature: up to 70° C

We offer you three alternatives to save money!

All necessary components for heat utilisation are already installed during the production of the compressor.

The Advantage:

  • Simply connect on site and save cash directly!
  • Constant temperature control: Depending on the available heat, the customer's water temperature is kept at the desired temperature level.

The compressor is prepared for heat utilisation when newly ordered, i. e.:

  • 2 ball valves at the oil tank outlet
  • Space requirement for heat exchanger etc. is taken into account in the system
  • Water connection openings are already pre-drilled in the panels.
  • Later completion with a retrofit kit is possible without effort, i.e.:
    • Heat exchanger
    • Control valve + temperature sensor
    • Hose/pipe connector

External modules for retrofitting already installed compressors.

The advantage:

  • Easy connection to all compressors
  • Fully equipped with all necessary high-efficiency components and safety devices
  • Minimal installation costs due to intelligent ALMiG technology
  • Constant temperature control


Brochure - Heat recovery - German
File type: PDF
File size: 1 MB
Brochure - ALMiG Heat recovery - English
File type: PDF
File size: 1 MB