ALFONS GRASSL GmbH Managing Directors: Klaus Zdera, Alexander Zdera, Sebastian Zdera - sanitary and heating engineering office - project planning and implementation of building services systems for industrial and residential construction Ganghoferstr. 90, 81373 Munich Tel: (089) 76 41 59 / Fax: (089) 721 23 21 USt-Ident-Nr: 186892215 website is ... info@alfons-grassl-gmbh.de