[Equest-users] ASHRAE 90.1 Specific Question - How to Determine Lighted Facade Area

[Ömer Moltay]

Dear All,

For baseline exterior lighting power, ASHRAE 90.1 instructs us to accept 
0.2 W/ft2 for each illuminated wall or surface.

If we have a glass curtain walled office building with lighting provided 
by luminaires mounted on facade spandrels, what is the definition of 
illuminated wall? Spandrels + glass, or just spandrels?

Thanks,

Omer Moltay
Mimta