The durability and high quality of all products conserves resources - unlike competing products, every part is replaceable and the 10-year spare parts guarantee contributes to long-term use. During production, the recycled content of plastics is - where possible - over 50%, production waste is recycled, the waste heat from plastic production is used for heating via heat pumps, and more than 1/3 of the necessary energy is obtained from the in-house photovoltaic system.