Circulating air between veg and bloom

[Jakkar]

Whats up guys? Looking for thoughts and opinions on what I plan on doing in a new grow. My bloom room is 12x24 and veg area is about 9x24. I was wondering if I can get away with just circulating the air back and forth between the 2 rooms using a total of 6 700+cmf 8" fans. Both rooms will have co2 burners, veg at around 800 and bloom around 1200. Veg will be on an 18/6 schedule. Heres a rough sketch of the complete grow area. The crudely drawn arrows are the inline fans. The little red box is the cut out for the stairs. The main question is.... Is fresh air a must or will the circulating in-between the rooms be enough?

Thanks,
Jakkar

 

[Renfro]

Well if you are circulating between rooms I would just do the CO2 generator in the flowering room at 1200 and the veg room just gets the CO2 from the air exchange.

Just remember you won't be able to run a higher RH% in veg as it will affect the flowering room.

It is a good idea to bring in fresh air once a day to push out the ethylene gas.

 

[Renfro]

I dunno what size the rooms are but you may want to just use two large blowers like 12 inch vortex and have one on each end of that wall.

I would think the blower will prevent light from coming through the vents.

 

[Jakkar]

Thanks for the reply, one of the in-line fans is hooked to filter in the crawl space window so there will be some fresh air introduced but not very much. The reason I would like to use 2 burners is to keep my big burner in the bloom from staying on for so long; to even the heat out in a way.

 

[Renfro]

The reason I would like to use 2 burners is to keep my big burner in the bloom from staying on for so long; to even the heat out in a way.

Whatever works lol. If you got the equipment, use it.

I don't see the CO2 levels in the veg room staying at 700 anyway since the air from the flowering room will come in at 1200 PPM. So the burner in veg won't see the need to kick on.

 

[Renfro]

The hours that the flowering room lights are off that CO2 generator won't run so the veg room generator can help those hours. You will notice that your plants will put out CO2 when the lights are off so when the flowering room is off you will get some free CO2 for veg.

 

[Jakkar]

Just use the burner in the veg room, you're exchanging air between rooms so the CO2 levels will be the same in each room anyways.

That's what I'm thinking. I'll just set the controller at 800 and whenever it needs it will kick on. It'll also introduce air with elevated co2 levels into the bloom room keeping that one from kicking on as much.