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Home > Environment and services > Lighting 

Title: Daylight protractors

Ref Code: AP68

Abstract1: Protractor set (2nd series), numbers 1 to 10 plus a guide. The full set of protractors covers rooflight and side windows, and both overcast and uniform skies. The protractors calculate the sky component of daylight factor. In conjunction with BRE Digests 309 and 310, they can be used to find the daylight factor at a point indoors. For assessing the loss of light to an existing building following construction of a development next door, BR209 'Site layout planning for daylight and sunlight’ should be used.



Year Published: 1991

ISBN: 978-1-86081-765-6




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