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What up DGC!

Currently growing in the front room of my house that faces the road. Windows on three sides of room. Im running 2 tents, 4×4 & 5×5. Hlg 650r and 600r. I need to exhaust heat out of the windows but I have to keep everything low key. Any ideas on how to disguise the exhaust running out the window? I would like for it to not be noticeable by foot traffic. Thanks again.