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Grunn Upvc windows & doors with Aluplast Profile Systems, feature an innovative technology for improved performance characteristics and a longer life cycle of the surfaces. Whether you are constructing a new home, remodeling an existing building or optimizing the energy performance of your house – Grunn has the perfect window system for your project. Grunn upvc windows & doors with Aluplast Profiles, bring an intelligent mixture of plastics and aluminium: Joining the properties of a uPVC window with clipped-on exterior aluminium shells combines a whole bunch of benefits a pure aluminium window cannot come up with. The result is a high-end product combining an appealing design, individuality and the highest level of security. Grunn Upvc windows & doors with german dynamics of Aluplast, is the best solution for an energy efficient architectural design.