Note: Please direct technical inquiries on the topics of "Energy-efficient construction and renovation" and "List of energy efficiency experts for federal funding programs" to the following hotlines:

Do you have any questions about EnEV, energy certification, balancing, iSFP or similar?
Our service center will advise you free of charge: +49 (0) 30 66 777-881
Monday 10 a.m. to 12 p.m. and 2 p.m. to 4 p.m., Wednesday and Thursday 10 a.m. to 12 p.m.
Specialist portal for energy-efficient building and renovation: www.gebaeudeforum.de

Do you have any questions about the expert list or the expert search?
Our service center will advise you free of charge: +49 (0) 30 66 777-222
Monday to Friday 9 a.m. to 12 p.m. and Monday and Wednesday 2 p.m. to 4 p.m.
List of energy efficiency experts for federal funding programs: www.energie-effizienz-experten.de

For general inquiries to dena, use the following contact options or the form below.
Tel: +49 (0)30 66 777 - 0
Fax: +49 (0)30 66 777 - 699