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Lights Sensible Heat Addition - Return Air Fraction

Hi guys, I'm modeling an office building with multiple levels on OS 2.2. When I noticed that heat addition from lights were quite high, I wanted to set a fraction of that heat would go in the return air of a plenum, but that field in the Loads 'Light Definitions' (Return Air Fraction) is blocked.

What are my options to send a fraction of the heat from my fixtures out of my thermal zones ? Do I have to make a plenum ? Other Ideas ?

Cheers ! !

image description

Lights Sensible Heat Addition - Return Air Fraction

Hi guys, I'm modeling an office building with multiple levels on OS 2.2. When I noticed that heat addition from lights were quite high, I wanted to set a fraction of that heat would go in the return air of a plenum, but that field in the Loads 'Light Definitions' (Return Air Fraction) is blocked.

What are my options to send a fraction of the heat from my fixtures out of my thermal zones ? Do I have to make a plenum ? Other Ideas ?

Cheers ! !

image description

Lights Sensible Heat Addition - Return Air Fraction

Hi guys, I'm modeling an office building with multiple levels on OS 2.2. When I noticed that heat addition from lights were quite high, I wanted to set a fraction of that heat would go in the return air of a plenum, but that field in the Loads 'Light Definitions' (Return Air Fraction) is blocked.

What are my options to send a fraction of the heat from my fixtures out of my thermal zones ? Do I have to make a plenum ? Other Ideas ?

Cheers ! !

image description

Lights Sensible Heat Addition - Return Air Fraction

Hi guys, I'm modeling an office building with multiple levels on OS 2.2. When I noticed that heat addition from lights were quite high, I wanted to set a fraction of that heat would go in the return air of a plenum, but that field in the Loads 'Light Definitions' (Return Air Fraction) is blocked.

What are my options to send a fraction of the heat from my fixtures out of my thermal zones ? Do I have to make a plenum ? Other Ideas ?

Cheers ! !

image description

Lights Sensible Heat Addition - Return Air Fraction

Hi guys, I'm modeling an office building with multiple levels on OS 2.2. When I noticed that heat addition from lights were quite high, I wanted to set a fraction of that heat would go in the return air of a plenum, but that field in the Loads 'Light Definitions' (Return Air Fraction) is blocked.

What are my options to send a fraction of the heat from my fixtures out of my thermal zones ? Do I have to make a plenum ? Other Ideas ?

Cheers ! !

image description