Pulling air from adjacent 12'x16' room to cool grow chamber (350 cubic ft) and hid light via two 6 inch 435 cfm inline fans. When needed the adjacent room is air conditioned by a 6500 btu window unit approx. 5 months per year. Would drawing that volume of air adversely effect the ac unit? If so, what size unit would be sufficient for these cooling needs? Keep in mind this would be in a building with no centralized heating/cooling and summer time temps 90-100 f. Ducting would be through the attic space approx. 12-15 ft run with insulated ducting.