Venting Sealed room for Ethylene

Whats up,
i am running a sealed room. I have a power vent in the ceiling to prevent ethylene build up. I Run the vent continuously during the dark cycle (no CO2 to waste) but my question is, should i run the vent at any point during the photo period? i don't want to waste CO2, but I am afraid of ethylene damage. Anyone out there familiar with ethylene release rates in cannabis plants? This is the gaseous hormone that regulates ripening (death) of a plant. it's the reason behind setting a ripe banana next to a bunch of green bananas, in order to make the green ones ripen faster. The ripe one releases ethylene into the air, the green ones absorb it, and ripen faster. In cannabis plants a build up of ethylene can cause stunted bud growth, and the ripening of the trichomes earlier, resulting in less production. Ethylene damage is almost impossible to notice until the end of the crop when it's too late, or when comparing one harvest to another. SO, I don't mean to ramble sorry. Should I run the vent in the rooms photo period at all? Is there any equipment out there that will measure the amount of ethylene in the room, that any of you have used and may be able to recommend?
 
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