heat gain). This essentially translates to an insulated glazing unit (IGU) with a low-emissivity coating. As an optical daylighting and solar control product, LightLouver units..., such as the need for added solar control, may suggest the use of LightLouver units even if the glazing does not meet the minimum performance specification. Additionally, the layout... that are part of an integrated lighting (daylighting + electric lighting + lighting controls) design solution. Adhering to these minimum performance specifications, and the manufacturer...