Since 1954, Rationel has been perfecting the art of manufacturing energy saving windows and doors of the highest quality, with a strong focus on both security and comfort. Beautifully designed windows can encourage mindful living and shared experiences, and create a literal opening to the outside world.
Designed in Scandinavia, for British homes that desire the balance between daylight and comfort. Rationel windows use sustainably-sourced timber and exceptional craftsmanship – they’re built to last for decades and to be enjoyed for generations.
|Security||Meets ‘Secured By Design’ standards|
|Sustainability||Majority sourced from FSC-certified forests|
|U-Value||0.79 W/m2k (triple glazing)|
|Sound reduction||42 DB Rw (triple glazing)|
|Colours||Over 400 RAL colours available|
|Compliance||Meets Passivhaus standards|