Well, the reason for pulling air from the upper to the lower level is to get heat to the lower during the period 7AM to 7PM when the lights are off below. Otherwise I have to add a heater, (again) and the reason I "flip/flopped" the lighting below was to alway's have at least one level with lights on.
Otherwise there was a 6 hour period when ALL lights were off. Too damn difficult and confusing....4 timer's, 5 fan's and a whole lotta headache!
OMB Reviewed by OMB on . Chasin temps....Aaaaauuuuugh! This is driving me nuts!! Garage cabinet grow....6' wide, 2' deep and 8' tall split in half across the middle. Veg on top, flower below. Air exchange between the two level's and I just "rolled" the flowering lights so they are on 7PM to 7AM to help with heat at night. Upper is 7AM to 1 AM, so there is an "overlap" when ALL the lights are on. I had to add a radiant heater below for heat before I "rolled" the flower lights 12 hours to a 7PM start so I could use the heat being generated. So Rating: 5