Velfac Windows and Doors

VELFAC was founded by Danish civil engineer Villum Kann Rasmussen (1909-1993), the same man who invented the VELUX roof window. For more than 60 years VELFAC windows and doors have helped create better buildings, filled with daylight, fresh air and the perfect indoor climate. But not many people know that it all started with a single great idea. These two companies plus Rationel make up the Dovista brand.
Over the next few months, Dovista will be merging their two existing brands, VELFAC and Rationel, so that by the end of 2026 all Rationel products will be re-branded as VELFAC.