Rationel is part of the DOVISTA group, which comprises a number of leading brands supplying facade windows and doors throughout Europe.
DOVISTA is owned by the Danish VKR Holding. VKR was founded in 1941 by Villum Kann Rasmussen, the inventor of the VELUX roof window, with one mission; to bring natural daylight, fresh air and a better environment into people’s everyday lives.
Roof & Skylights
Vertical windows
Biggest in Europe
DOVISTA is Europe’s largest manufacturer of vertical windows. The group consists of 14 different brands, each of which has strong roots in its local market.
The companies work independently, each with its own expertise, products and in its own marketplace.
The companies work independently, each with its own expertise, products and in its own marketplace.
At the same time, each company is part of the strong DOVISTA community, sharing inspiration, knowledge and the business philosophy of being socially responsible model companies.
We want to make a difference
A portion of our profits go to THE VELUX FOUNDATIONS which support a range of environmental, scientific, cultural and social purposes. Due to the daily efforts of the nearly 20,000 VKR employees the Foundations gave grants totalling approx €181 million in 2022.
“The purpose of the VKR Group is to establish a number of model companies which cooperate in an exemplary manner. A model company works with products useful to society and treats its customers, suppliers, employees of all categories and shareholders better than most other companies.”
Villum Kann Rasmussen, 1965
