Roof vent hood exhaust airflow 0.100 In sp 2 520 cfm hood height 16 in hood length 44 in hood width 48 in cutout length 23 1 2 in cutout width 23 1 2 in housing material steel assembly partially assembled compatible curb grainger part number 2zv83 3flt5 4c454 compatible damper grainger part number 3hhl6 mount type roof curb number of filters 0
