Rationel Vinduer is a Danish maker of energy-efficient windows and doors sold through retail partners in Europe.
Founded in 1954 in Herning, Denmark, Rationel Vinduer produces windows and doors for residential buildings, including side-hung, top-hung and tilt-and-turn windows, entrance doors and sliding patio doors. Its products are sold to private homeowners, builders and construction professionals through over 250 retail partners in countries including Denmark, Germany and Sweden. The company reported revenue of USD 117.34 mn and EBITDA of USD 3.24 mn in 2019, and VKR Holding acquired it in 2003.
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