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Altenburger Energieberatung, Berlin office, Habsburger Str. 9, 10781 Berlin

+49 (0)30 52 00 51 44, info@altenburger-energieberatung.de,

Authorized managing director: Laurent Altenburger

VAT ID number: DE 298378801,

This is the imprint of Altenburger Energieberatung, an energy consulting company for residential buildings in Berlin-Brandenburg. Listed as energy efficiency expert (DENA - BAFA Consultant Number BAFA: EB104929, WTA GmbH)

Images: Credit Unsplash and Arnold Drewer / Blown-in Insulation Association FVED (blown-in insulation pictures)