Noise reduction of compressors

To dampen the noise, you need to encapsulate the compressor, i.e. build a kind of room around the compressor and line the inside with approx. 40 - 60 mm thick foam. If the area is dry, our PUR recycled foams are ideally suited. We particularly recommend our PUR recycled foam, as its high weight improves noise insulation. Basic rule: the thicker, the better the insulation.

You can bond this material with our various assembly adhesives or we can equip the material with a self-adhesive. To maximise the insulation, you can also build a combination product: A PUR recycled board is bonded first, followed by our double-sided adhesive Terodem® bitumen heavy foil and then our PUR recycled foam.

However, if you need to fulfil fire protection regulations, then you should use our Basotect® G+ melamine foam absorbers from a thickness of approx. 50 mm. Basotect® G+ foams are tested for low flammability in accordance with DIN 4102 B1 or BKZ 5.2. However, PUR recycled boards provide better insulation. If you have appropriate fire protection requirements, you can also use the Teroform® plastic heavy layer/PUR foam combination with a BKZ 5.2 flame retardant, this material combination has excellent sound insulation properties.

If the compressor is located outdoors or in an area that is damp or wet, the foams mentioned above are not suitable as they absorb water and can be damaged. Outdoors, you should use the highly weather-resistant Vibra®Quash polyethylene foam. This is particularly suitable for use in areas where moisture or humidity can occur. You can also encapsulate the compressor and then proceed as described above. Basic principle: The thicker you choose the foam, the better the insulation. It should be as dry as possible. If the foam absorbs moisture from time to time and can dry out again, this is not so dramatic, but permanent moisture and dampness will quickly degrade the foam. You should therefore take this into account when designing the encapsulation.

However, most compressors also need to be ventilated. Of course, this cannot be directly combined with noise insulation. You therefore need to build an additional ventilation duct and also line it with foam on the inside so that air can be drawn in or blown out. Here it is best to use our dimpled foam with a thickness of 40 - 50 mm. Ideally, you should nest the duct so that the sound cannot escape directly.