hi, ok im changing shades from normal 600watters to air cooled tubes. i have a 5 inch rvk extractor which is vented up into the atic space. with both 600 hps on without air cooled shades and my rvk 5 inch and carbon filter running my temps are at hi end of 70's. 78 to be persise. so im adding cool shades to hopfully lower the temps down. all 5inch with 5 inch ducting and a 5 inch hole into atic. my rvk extractor is in the grow space hi up at the moment. but i want to put it in the atic extracting thru both cool tube shades. that will make it about 4 meters of ducting from shades to extractor. will that have anoth pull onit at that disstance??? i want extract in the atic because of noise

cheers