Inquiry (采购产品): Intrinsically Safe HEPA I looking for an intrinically safe (explosion proof) HEPA vacuum for cleaning of a firing range. Because of the size of the range, it needs to be self propelled. Please let me know if you have anything that would work. Thank you , sherri **** Hidden Message ***** Sherri Eng 23113 USA Company: Baker Environmental E-mail: seng@mbakercorp.com **** Hidden Message ***** seng@mbakercorp.com