Air King High Volume Exhaust Fans AK400, AK500, AK600
Can be adapted for top discharge mounting, straight through inline or right angle inline (hardware not included). Insulated housing with motors & blowers mounted on vibration isolators Painted white, metal grill. 4½" x 18½" duct connector with 2 aluminum backdraft dampers. Uses forward curved non overloading polymeric blower wheels. 24" on center joists mounting using the supplied mounting angles or hung for suspended ceilings using 1/4-20 support rod. Wiring access from top or side with easy service access through large removable access panel or through the grill. HVI Certified performance.