Skip to main content

Calculating daylight

The daylight factor method (CIE - E.U.) calculates how much daylight reaches any location in a room assuming overcast/diffuse conditions; and can account for corner windows, which cannot be accounted for using the lumen method (IES - U.S.). When 2,200 fc is measured on the ground outside, what is the resulting illumination level if one end of a room has a daylight factor of 2?



Answer is 2200 fc x 0.02 = 44 fc. DF is a percentage of the light available outside.
are-review.blogspot.com

Comments

Try These Too!

Parking units

What are the car stall dimensions for a compact car? Answer A compact car stall size can be set by each municipality and therefore varies. Generally it is 7ft 6in wide by 15ft 0in long. However, in Fresno CA it's 8 1/2ft x 16ft and according to an Iowa urban design manual, it's 7ft 6in by 16ft. ARE 4.0 exam prep: SPD

Townships double post!

How many sections are contained within a township? Answer 36 (each is 1 mile square) What are the dimensions of 1/2 of a township? H & W Answer 18 miles square (3x6 sections) ARE 4.0 exam prep: SPD

Building Efficiency

Convert the usable area of classrooms planned with medium efficiency level of new construction to the gross building area given the following model factors: Net Assignable Square Feet: 10,000, Space Factor: 1.5, Building Efficiency Ratio: 67%