If I have a window wall that receives light through another room that has a window wall and is recieveing light from the exteriors. So can this interior window wall be included in the calculations with full Tvis value or would it be a decreased value or is it completetely excluded from the calculations.
Thank you.
Carlie Bullock-Jones
PrincipalEcoworks Studio
LEEDuser Expert
220 thumbs up
January 21, 2010 - 8:54 am
Unfortunately, the prescriptive daylight zone credit Option 2 is designed for simple geometries and does not allow for interior areas to borrow light from adjacent perimeter spaces as a means of calculating the interior room’s daylight level. Depending on your floor plan you could do the calculation for the whole space in question by combining the square footages of both the interior room + the perimeter space with glazing.
If these areas do not meet the credit requirements you could approach the credit via Option 4 with either a simulation (Option 1) or actual measurement (Option 3) for these areas.