help with exhaust in 8x8 growlab

my exhaust system consists of a 6" 435 cfm fan and carbon filter for temp humidity control and an 8" 865 cfm that is split to two 6" ducts to cool three 1000 watt lights .my question is that is a lot of cfm to be pulling from my bedroom i have a large ac unit built into bedroom wall when all fans are running it pulls air from everywhere it can had to cover my can lights because it was pulling air from attic into my room to keep it from pulling attic air i have to open my bedroom door so can pull from living room unfortionately living room air is always much warmer than bedroom the hydro shop guy said that this is the way i should run it just doesnt seem right to me but im not to experienced with growroom setup so here is some pics of my setup thanks for any good advice on how to maybe fix this prob b

Yeah man idk, the airs gotta from from somewhere tho. I think unless you can make a passive intake hole somewhere in the room then it's gonna have to come from the living room. Good luck.

anyone think i could run my ducting for my lights thru the attic to a fresh air source if i attach hepa filter

if your pulling air from you bedroom that has an AC unit cooling the air why draw air from the living room? I am thinking that even if the windows and doors are closed in your bedroom all the air will never be use up inside that area since its not air tight. Since the air is being cooled you can reuse the same air that is cooling your lights. Honestly, your question is not very concise so I dont really know what your asking. Just trying to help

trouble27 said:

anyone think i could run my ducting for my lights thru the attic to a fresh air source if i attach hepa filter

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yes, have done it. most attics have an exhaust vent.

bigdank said:

if your pulling air from you bedroom that has an AC unit cooling the air why draw air from the living room? I am thinking that even if the windows and doors are closed in your bedroom all the air will never be use up inside that area since its not air tight. Since the air is being cooled you can reuse the same air that is cooling your lights. Honestly, your question is not very concise so I dont really know what your asking. Just trying to help

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clearly not trying to help
i agree wiyh beansly, its gonna come from somewhere. if your pressure is that negative then your fans are working harder than they have too. id cool the living room too then

Where are you exhausting to? The attic? If you're AC is good enough just exhaust into your room. That way you dont have too much negative air pressure.