Home about us Services credentials Contact Data protection imprint Welcome! Are you looking for a partner for your project in the field of ventilation, air conditioning or sorption technology? Do you need reliable planning, cost estimates or installation for a high-quality ventilation system? Do you deal with sorption technology and are you looking for a competent company for advice, planning, project support and implementation of your construction project? Welcome to Koss GmbH - your search is now over. We are an executing company in the field of air, air conditioning and sorption technology in the Hanover area and have been taking care of the needs of our satisfied customers from all over Germany and neighboring European countries for over 15 years with professionalism and competence. Starting with the planning, through the project management including the assembly up to the project completion, we look after construction projects of all sizes reliably and competently! We build ventilation systems, air conditioning systems, refrigeration systems and heating systems for commercial, municipal and industrial customers. Would you like to find out more about our scope of services? Click on Services in the menu . Write us a message or call us on 05132 8889-0! Direct contact Koss GmbH Air, Air Conditioning and Sorption Technology Zum Blauen See 7 31275 Lehrte Telephone +49 (0) 5132 8889-0 Fax +49 (0) 5132-8889-29 Email info@koss-gmbh.de Copyright © 2015 Koss GmbH · Air, Air Conditioning and Sorption Technology · Concept & Design QUADROTEC IMPRINT In order to optimize our website for you and to be able to continuously improve it, we use cookies. By continuing to use the website, you agree to the use of cookies - confirm this notice with "OK". You can also refuse the use of cookies - however, some functions of the website will then not be available. To do this, click the "Reject" button. Further information on cookies can be found in our data protection declaration via the "Further information" button. Accept Reject additional Information