What are Daylighting Calculations? 
Daylighting Calculations are produced by our assessors to determine the amount of natural light that is anticipated to penetrate a room. Factors such as the size of the opening, reflectivity of surfaces, and view of clear sky from a window will all affect the daylight factor in a room.
Awardable Credits
The calculations can be used to achieve 1 to 3 credits in Health & Wellbeing (Hea 1) in EcoHomes or the Code for Sustainable Homes. One credit can be achieved where the average daylight factor for kitchens achieves a minimum of 2%. One credit can also be achieved where the daylight factor achieves a minimum of 1.5% in lounges, dining rooms and home offices. Another credit can be met where a minimum of 80% of the kitchen, lounge, dining room and home office receives direct light from the sky.