About Rationel Vinduer Ltd.

Good, solid quality workmanship has characterised Rationel's windows and doors since the first products were shipped from the factory in Sdr. Felding, Denmark, in 1954. On that basis, Rationel has created a sound foundation, and is today an international company with sales activities in Denmark, Great Britain and Ireland.

Rationel manufactures energy saving and contributing windows and doors of premium quality in terms of comfort and security. We develop our windows and doors continuously, ensuring that they will always meet current statutory requirements as well as market requirements for design and functionality.

Rationel is part of the DOVISTA Group which consists of ten leading door and window companies in Europe. DOVISTA A/S is owned by VKR Holding and employs approx. 15,000 people in more than 40 countries.

The history of Rationel

1954 Rationel was founded
1987 Rationel IE was established
1995 Rationel UK was established
1999 Valcap A/S and Axcel bought Rationel
2001 The production of plastic windows stopped
2004 VKR Holding bought Rationel
2007 The first Danish window producer with CE-tested products
2010 Rationel wins the Danish Building Industry's Energy Award