Building green involves the business of manufacturing. Therefore they do not manufacture products or by-products which can negatively impact our world. Cosella-Dorken is very sensitive to protecting their environment and the people who are in their employ, while producing high quality, sustainable products that will create healthier living environments. The quality of their products is not only monitored consistently throughout all steps of their operations, but also independently confirmed by renowned experts and institutes on a regular basis. Cosella-Dorken take pride in their work and in their products. "DELTA® protects property. Saves energy. Creates Comfort." is one of the guiding principles for their company and, at the same time, for their product range. Out of respect for nature, environmental protection is strictly observed in all areas of the business.