We are proud that all the country's plumbers retails OSO products. The plumber industry consists of many skilled small and large businesses, which is spread all over Norway. We always recommend that our products be installed by professionals, and our extended 5 year warranty applies only when a plumber has mounted the heater. Therefore, contact your local plumber or one of the nationwide plumbing chains today. You can also call one of the OSO Service Centers for recommendations and advice on products and installation (select in the list).