i ahve bud not just sealed by closing the room door but by using the black nd white reflector gear so i walk into the room take my outer garments off and then i have to unzip with room door closed to enter my grow=veg area 600w hps running @76 and 51%humidity. seems to work but admitedly this time round is my first doing autos.. yeilds are looking medicore i guess maybe looking at 3-5oz a plant atm we know tht could change in the blink of an eye these little autos are delicate little MFs.hahahaYou must have a nicely sealed room.