BEAM Plus

BREEAM

CIBSE

LEED

Three Stars

Daylight Factor

80% area, 1% (1 credit)

95% area, 1% (2 credit)

Different latitude has a different standard

Different function has a different standard

75% occupied space, 2%

×

Vertical Daylight Factor

√

×

×

×

×

Uniformity

≥0.3, ≥0.7 (atria), or 80% area view sky, and d/w+d/HW < 2/(1-RB)

Task Illuminance: ≥0.7 illuminances of immediate surrounding area: ≥0.5

×

×

Annual Illuminance

≥75%, 100 lux (1 credit)

≥85%, 100 lux (2 credit)

≥80% area, 200 lux, 2650 hrs (avg.) 60 lux, 2650 hrs (min)

Different function has different standard

×

Refer to GB/t50033

View of sky

≥60%, (1 credit)

≥80%, (2 credit)

80% area

×

90%

×

Unified Glare Rating (UGR)

×

×

Different function has different standard

×

×

Window to Wall

×

Depends on distance from widow to work space

Depends on the depth of room from outside wall

×

0.3 ≤ x ≤ 0.4