M y outdoor shed is 8 feet long 5 feet wide and 7 foot high, im running 2 600watt hps in cooltubes with a 6 inch vortex, completly sealed minus a portable ac.. right now the noise isnt bad but not sound proof. My next run im using a 1000gph pump for a new hydro setup and its loud... I plan on using batt inulation around the whole shed, then hanging the mylar.. How much will this help with sound..?trying to hear experiance before i spend 230 on insulation and 3 hours putting it up(insulation sux putting up), any comments?