The World Leader in Engine Exhaust Removal for the Fire and EMS Industry. The AIRVAC-911 Systems are the most effective, complete and efficient "Hose Free" Systems on the market. 100% fully automatic and hands free removal of harmful engine exhaust from within your apparatus area. Meets 2013 NFPA 1500, OSHA, IBOCA, EPA & GSA approved. FREE quotations and site evaluations available.