Environmental and health related criteria for buildings - ANEC

IBO - Environmental and Health related Criteria for Buildings
As the daylight factor depends on the various parameters (e.g. specific geometry of each
room, the degree of reflection of the room’s surfaces, the shading caused by overhangs,
jutties and neighbouring buildings varying on each floor and façade) the evidence to provide
for residential buildings to achieve an average daylight factor for at least 50% of the net floor
area is rather complex. Evidence referring to the same type of rooms may lower the
expenditure of time and costs for assessment.
2. Views out
Views may not be limited by shading or glare devices. Assessment refers to manufacturer’s
data or photo documentation.
3. Color rendering index
The color rendering index of shading or glare devices and glazings has to exceed 90 as
maximum requirement and 80 as minimum requirement.
4. Sunlight penetration (wintertime)
The minimum requirement is more than 1 hour winter sun on January 17th (according to
DIN 5034-1) for at least 1 room for 80% of the dwellings. The maximum requirement is 4
hours on January 17 th . Evidence must be provided for the centre of the window in parapet
height within the façade plane.
9.8. TQB
TQB evaluates the access to daylight for residential buildings by two complementary
indicators as follows:
1) Daylight Factor:
At least, a point daylight factor >= 2% has to be achieved for the living rooms (in 2m room
depth, 1m distance from a side wall, reference plane: 0.85m) for more than 85% respectively
25% of the dwellings (as maximum or minimum requirement). The day light factor is
influenced by the light transmission value of the glazings, geometry and degree of reflection
of the room’s surfaces, shadings through overhangs (balconies, roofs,..), obstructions by
neighbouring buildings, trees, landscape,….
2) Winter Sun:
On 21 st december more than 1.5 sun hours per day have to be achieved in the living rooms
for more than 85% respectively 25% of the dwellings (as maximum or minimum
requirement).
Evidence is provided by calculations in the design stage and on-site measurements after
construction.
The highest requirement levels of both indicators award 50 of 1000 available points (resulting
in 5.0% overall weighting). Within the subsection Health and Comfort, daylighting issues are
Final Report 101 31 03 2011