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To be fair, trolmaster documentation is as rare as the dodo bird. The reason I even found this forum was doing a search for Trolmaster info pre-sales. Even the controller manual for the hydro x pro is extremely limited.

Im not being arrogant,just curious why. But it really doesnt matter to me either way. I have found that in the last 27 years of growing often people are looking for solutions for problems that dont exist. My last grow was 2 rooms with 100 lights in each for veg/flowering so I must be doing...

Ok, enlighten me, why do you need a air exchange when the lights are on and you are using co2?

ummm... just curious why you want to do a air exchange with co2? The only time I could see a air exchange being necessary is right after the lights go off and intervals when the lights are off. Co2 isn't beneficial during veg, only flowering. And why aren't you using a co2 controller? Your math...