#LIGHTING POWER DENSITY ASHRAE 90.1 CODE#

The total area of the facility must then be divided into each of these categories with specific areas for each space. For instance, a hospital is divided into 14 different space types from corridors less than 8 ft wide to recovery areas to nurse stations. These codes have similar restrictions concerning maximum lighting power densities (LPD) for various facilities, but they approach the final calculations in different manners.ДЄSHRAE gives you a list of various types of facilities and then has subcategories within each facility type with specific restrictions on the LPD for each of the space categories.

#LIGHTING POWER DENSITY ASHRAE 90.1 CODE#

Exterior lighting is greatly restricted and dark-sky initiatives, such as the International Dark Sky Association, are normally required by most authorities having jurisdiction (AHJ) general exterior lighting on building facades is no longer permitted because it wipes out the visibility of stars in the vicinity of urban areas.ДЇor most states and jurisdictions, interior and exterior lighting design for new or renovated facilities is controlled by either ASHRAE 90.1: Energy Standard for Buildings Except Low-Rise Residential Buildings (2013 edition) or the International Energy Conservation Code (IECC, 2012 edition), depending on which code is adopted by the AHJ.

Historically, offices that may have used 5 W/sq ft to 8 W/sq ft for lighting, now are allocated 1 W/sq ft. Architects, developers, and owners constantly complain that there is not enough light, whether they are talking about offices, common areas, corridors, or parking lots.

Lighting power density ashrae 90.1