Fans On or Off during Lights Out??

[harris7]

Well Doco,

Why don't you run them 24hours and find out. So you think that 6 hours without fresh oxygen is okay? Hmmmm maybe plants are just a little different from people. Not too many thing survive without oxygen.

Loco

I also wasn't sure if i needed my vent fans on when lights are off.

When you turn the fans off there is a lot of O2 in the room, actually 21%. I can understand that CO2 would be depleted quickly if there wasn't ventilation because there is only a 0.035% concentration of CO2 in the atmosphere. so thats 600 times more oxygen. it wouldn't surprise me if the plants didn't use all that up in only 6 hours. other wise that means that the CO2 in a room would be used up in less than 0.6 min.

does anyone know...