Rationel AURA Timber Window Range

Our new ‘energy-contributing’ Rationel AURA windows offer the same excellent properties as Rationel AURA+, but these windows are made entirely from timber. You can therefore combine a beautiful natural look with a clean contemporary design for modern buildings and Passiv Haus. Rationel AURA ensures that high levels of daylight and solar heat gain are achieved.


Rationel AURA


Rationel AURA+


Rationel FORMA


Rationel FORMA+

Rationel AURA

This free heat is the best energy source available and also provides a healthy and comfortable indoor climate. These windows come with security ironmongery as standard, and are suitable for Passiv Haus buildings.


Security Hardware

Rationel AURA & Rationel AURA+ come with security hardware as standard to meet SBD requirements. The vast majority of timber originates from FSC-certified forests.

Secured By Design
Rationel Logo

Windows With Vision

Good, solid, quality workmanship has characterised Rationel’s windows and doors since the first products were shipped from our factory in Sdr. Felding in 1954. Based on this sound foundation, Rationel is today an international company with sales offices in Great Britain, Ireland and Denmark. Rationel manufactures energy saving windows and doors of premium quality in terms of both comfort and security. Our continuous programme of research and development ensures that the company always meets 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 approximately 13,500 people in more than 40 countries.

Opening Types

Top Guided

Top Guided windows are a simple, elegant and user-friendly design. Opening is controlled by tracks and slides. When opening the window the top of the sash slides downwards as the bottom of the sash opens outwards. Adjustable friction ironmongery allows an almost infinite choice of open positions.

Side Hung

Side Hung windows are controlled with tracks and slides. On windows over 424 mm wide, the handle controlled friction brake allows the window to be fixed in any open position.

Side Guided

Side Guided windows are controlled by tracks and slides that allow the window to be fixed in any open position. However, when opened, the hinge side of the sash moves toward the middle to create an opening that allows the glass to be cleaned from the inside.

Top Swing

In everyday operation the fully reversible window functions as a Top Guided window. However it is possible to turn the sash through 170 degrees to clean the glass from the inside.

Fixed Light

Fixed Light windows are ideal wherever maximum internal light and solar heat gain is required.


When choosing windows and doors from Rationel, it is possible to enhance the appearance and character of your house through your choice of colour. Our standard colours suit the majority of architectural styles and traditions in the United Kingdom. We also offer a special range of colours, which you can use to highlight particular features of your home.

Standard RAL Colours

Rationel AURA and Rationel AURA+ windows and doors are available in one standard colour on both the inside and outside of the frame. It is possible to have a split colour solution on Rationel AURA+, where you are able to have a different colour on the outside to what you choose for the inside.

* The colours shown cannot be reproduced exactly.

Product Details

Minimum/Maximum Sizes

Opening Function Minimum Width Minimum Height Maximum Width Maximum Height
Top Guided 358mm 388mm 1798mm 1598mm
Side Hung 358mm 358mm 948mm 1798mm
Side Guided 458mm 438mm 998mm 1598mm
Top Swing 558mm 548mm 1598mm 1598mm
Fixed Light 250mm 250mm 2998mm 2998mm

Durability Tests

A series of test videos are available to view on the website.

Sectional Details

Download full set of drawings at www.rationel.co.uk

Best Performance

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