EN Series all-electric explosion-proof pressure washers from Sioux Corporation have third-party certification for use in Class I Division 1, Group C and D; and Class II, Division 1, Group F and G hazardous environments. These units are certified to UL 1203, CSA C22.2 No. 25, and CSA C22.2 No. 30 safety standards. A unit built to Division 1 standards will also cover areas in Division 2 where ignitable concentrations of combustible or conductive gas or dust are not likely to exist but are possible under normal operating conditions. 888/763-8833; www.sioux.com.