There are many variables to be taken into account before specific calculations can be made, values determined and recommendations made. These include the longitude and latitude of building, the specific location regarding adjacent buildings and land, each facade in relation to the sun’s path. 
Alongside this, the design of the building must be considered. This includes the height of the windows from the ground and the technical properties of the glazed unit (ie glass type, cavity size, cavity content etc).
Please click the links below to view or download the technical data PDFs.

‘Low angles of Winter sun’

Sun shading in the Winter?
Have you noticed how the Sun adjusts its position in the sky, throughout the day and throughout the year?

Are the low angles of Winter sun causing you problems?
Unable to see clearly because there is too much light in the wrong places at the wrong time as the sun moves through the sky?

Adjustable sun needs adjustable shading.
This problem doesn’t occur every day and when it does it is only for a part of the day and only part of the year, but it will be back again next year and the year after that and you get the message.
So why not sort it now? Fit Reflex-Rol roller blinds, which give control of winter glare whilst improving privacy, reducing summer hear gain and reducing winter heating bills (by improving night time insulation). They even continue to give good levels natural light with plenty of outward daytime vision.
Solve the problems of low angles of winter sun and take the benefits the whole year round.
Reflex-Rol have been installing adjustable window shading roller blinds in the UK for over 30 years. A selection of hardware systems to suit the great majority of window types, industry leading solar filter/shade fabrics with the experience to recommend and install real solar shading solutions.
Call us now for more information and fabric/shading samples, or send us a photograph of a typical window, some size and quantity indications and we can arrange quick budget costings for you  01989 750 704.

The Ultimet 3 in 1 Energy Saving Blind.

Click in brochure 1/2 to view the file Brochure 1 / Brochure 2