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To determine the space-by-space lighting power allowance for the project:List all spaces in the building by space type designated in ASHRAE table 9.6.1.b. Determine the gross lighted floor area of each type of space in square feet.From ASHRAE table 9

To determine the space-by-space lighting power allowance for the project:

  • List all spaces in the building by space type designated in ASHRAE table 9.6.1.b. 
  • Determine the gross lighted floor area of each type of space in square feet.
  • From ASHRAE table 9.6.1, determine the allowable LPD for each space type. 
  • Multiply the area of each space by the allowable LPD. This equals the total allowed wattage for each space.
  • Add up all wattage for the different space types to find the lighting power allowance for the project.
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