After more than 100 years of success, Gretsch­-Unitas is one of the leading suppliers of window and door tech­no­logy, automatic entrance sys­tems and building manage­ment sys­tems. We offer an unrivalled selec­tion of pro­ducts ranging from window hard­ware for single-familiy homes through to compre­hensive building and facility manage­ment sys­tems. You are also welcome to con­tact us if you need a system pro­vider within the scope of CE cer­ti­fica­tion