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Please contact our sales department at the project stage. Our experienced specialists will be happy to advise you, demonstrate our products in your home and provide you with a free, no-obligation quote.

Our telephone hotline is available to our customers during the warranty period of a delivered product. You will receive the telephone extension number from our head office after specifying the purchased product with our article and invoice number.

Handling of repairs and loans:

We handle repairs in accordance with the RMA procedure.

You can apply for an RMA number directly online.

A description and an RMA form can be found under Downloads.

Here you will also find our conditions / form for the loan of test products.


Please fill-in our form and send it to MASS. You will receive a RMA number right away.

Contact informations
Further Informations
Estimated costs *

All returns are liable to pay handling charges of least € 106,- even if you cancel the repair. Only in case of warranty this charge is omitted. We refer to our RMA-procedure.

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