Ecobuild 2^nd March – 4^th March  2010 Earl’s Court, London.

 De Leeuw Ltd.   Stand No 2053. 

 Understanding a bit about the Sun and Solar Energy, we give you….

3 Windows, 3 Blinds, 1,000 Shading Solutions?

Window 1 has an external roller blind fitted with a screen fabric in black,

Window 2 has an internal roller blind using a ‘metalised’ polyester filter, and

Window 3 has the same filter on a motorised blind between the panes of a sealed unit.

De Leeuw ltd. staff  will be showing how the position, construction and colour (spectral properties) of the shading ‘fabric’ can be as important as the specification of the glazing and how it can be particularly successful  in ‘rescuing’ new build specification ‘oversights’. *

A 22 page laboratory report by Sonnergy Ltd focusing on the reflectance, absorbance and transmission of solar energy, commissioned by De Leeuw Ltd. demonstrates not only the significantly differing performances between the black and the white fabrics, the difference between an internal blind and an external blind but goes on to quantify them. All taking into account the glass specification (to standards defined in EN- 13363-1 drawing on EN 1450 and EN 14501).

Example: Double clear glass with low E coating is rated as allowing a total solar energy transmittance (g value) of 0.72, put the white screen fabric with this glazing as an internal blind and the value (g tot) improves to 0.39 but the same fabric in black mounted externally takes the value to an entirely different level of 0.19.

For light control the positioning internally or externally is not relevant but the White fabric will permit 23% of the visible light to pass whilst the black will take it down to 6%, but what if you are faced with daylight levels of 40,000 + lux  and you need to get levels in your office down to the recommended working levels of 300 to 500 lux?

Copies of the report will be available, free of charge, post show to stand visitors.

Initially produced for insertion in the BBSA ‘Shade Project’s database the data is relevant to specifiers on it own, right now.

Specifying a new build or refurbishment now – concerned about heat build up (Solar gain), levels of light, glare. Contact us now for details of solar shading materials, suitable hardware and methods of operation and control

‘We’ll change the way you look at blinds for ever’.

 

* We even have an acoustic solution for the reduction of ‘speech reverberation’.

 

Tags: anti glare, Ecobuild, exibition, glare, glare control, heat control, light control, lux, solar control, solar energy, solar gain, solar shading, technical shading

This entry was posted on Thursday, November 19th, 2009 at 10:44 am and is filed under De Leeuw, Mermet UK, Reflex-Rol UK. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.