Heat Gain from Lighting
Heat Gain from Lighting
(OP)
I am doing a cooling load calculation on a small office building <2000 sqrft. It is a pre-engineered steel building, r-19 roll insulation at the roof deck and r-19 batts on top of the lay-in ceiling.
When calculating the heat gain from the lay-in light fixtures should I use a multiplier to decrease the heat gain as a result of some of the heat being transmitted to the 'attic space'?
best regards,
Darrell
When calculating the heat gain from the lay-in light fixtures should I use a multiplier to decrease the heat gain as a result of some of the heat being transmitted to the 'attic space'?
best regards,
Darrell





RE: Heat Gain from Lighting
knowledge is power
RE: Heat Gain from Lighting
RE: Heat Gain from Lighting
don't put insulation on the lights unless they are IC rated. Also, the ballast will die sooner being warmer.
If my assumption of your leaky building is true, the heat gain from lights is your smallest problem and you need to assume more infiltration.