Cooling Load Factors: luminaire heat fractions
luminaire 11 to luminaire 13
ASHRAE cooling load calculation factors — people heat gain, lighting power density, luminaire heat fractions, motor efficiency, cooking/warewashing appliance heat gain, office/computer equipment heat gain, glazing optical properties, radiative/convective fractions, surface solar absorptance, wall and roof conduction time series (CTS), construction material layer properties, radiant time series (RTS), zone characteristics, and below-grade heat transfer coefficients. Source: ASHRAE Handbook Fundamentals 2021, Chapter 18.
| factor type | item id | luminaire category | radiative fraction max (dimensionless) | radiative fraction min (dimensionless) | space fraction max (dimensionless) | space fraction min (dimensionless) |
|---|---|---|---|---|---|---|
| luminaire heat fractions | luminaire 11 | Recessed LED color tuning fixture | 0.42 | 0.4 | 0.56 | 0.53 |
| luminaire heat fractions | luminaire 12 | High-bay LED fixture | 0.51 | 0.42 | 1 | 1 |
| luminaire heat fractions | luminaire 13 | Linear pendant LED fixture | 0.6 | 0.55 | 1 | 1 |
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