The UniFlow CE Hoods are available in Constant Air Volume CAV Air By-Pass or Variable Air Volume VAV which provide for maximum energy efficiency and user protection, Explosion Proof models, or CE models for International Electronic Configurations. Standard sizes of 30”, 36”, & 48” widths. The aerodynamic face opening with air foil provides uniform air flow into the fume chamber, and thru the VaraFlow Baffle System, to the 12” Diameter bell shaped exhaust collar. Performance tested to ASHRAE 110-1995, U.L.1805 Classified. and SEFA Recommended Practices.