Tochigi Works and its overseas affiliates have acquired International Standard Quality Management System ISO9001 and ISO14001 authorisation. The Tochigi Works performs thorough product quality control using various environmental tests. Hitachi Room Air Conditioning Indoor and Outdoor units are manufactured according to this ISO certification system. Hitachi products all carry the necessary ‘CE’declaration markings, and also feature in the extensiveEurovent Listing programme. Listing in the Eurovent directory helps ensure peace of mind for the installer and the end user, as it certifies the important operating parameters and performance of the units.

Quality control

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