How to calculate interior lighting power allowance in w/sq. m? how to calculate gross light floor area ratio in w/sq. m (GLFA)?
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Rock Ridolfi
AssociateEngineering Economics, Inc.
LEEDuser Expert
7 thumbs up
January 4, 2024 - 2:58 pm
Hi Pranav, ICC has posted Interior Lighting Power Allowances using either the Building Area Method under TABLE C405.3.2(1) or using the Space-by-Space Method under TABLE C405.3.2(2). For SI: 1 watt per square foot = 10.76 w/m2. You may need to verify local jurisdiction and the LEED referenced standards for the most applicable version.
https://codes.iccsafe.org/s/IECC2021P2/chapter-4-ce-commercial-energy-ef...