These heavy duty blowers are designed for air intake or extraction in engine compartment, bilges, galleys, accommodation and other compartments.CE marked according to following standards:ISO 9097:1991 Marine (Small craft, Electrical fans)ISO 8846:1990 (Ignition protection)ISO 10133: 2000 (Electrical systems)EN 55014-1:2006 (2004/108EC)Complies with: N.M.M.A USCG 183.410