• Fan & Blower - Split Phase, Dripproof Motors • Resilient Base Motors (Single & Two-Speed) • Ball bearings (except as noted) • Service factor, as noted • Thermal protection, as noted • Variable torque on two speed motors • Extended thru-bolts, as noted • Heavy gauge steel frame and base • 48Y and 48YZ frame have 48/56 frame mounting holes • UL recognized and CSA certified • Model 5KH35JN3132T