Rugged steel welded box housing has a durable powder-coated finish Heavy wire chrome-plated OSHA guards Totally enclosed ball bearing 1/3 HP motor with thermal overload protection ensures reliable performance Installs from interior Requires hardwired connection This Canarm Explosion-Proof Totally Enclosed Exhaust Fan has the quality and easy installation to make this efficient, low-maintenance fan a great choice for shops, farms and more.