FOB: Midwest warehouseVestil Shutter Mounted Exhaust Fans feature inside-building installation only with vents outside. Eliminate need for external framing and shutter. Ideally suited for thin wall buildings. Units are 115V, 1 phase totally enclosed and permanently lubricated. Pull chain switch. No cord. Junction box provided for direct wiring. Meets OSHA standards. If you need a large quantity of this product, call us at 1-800-338-1382 for additional bulk discounts!