Includes panel and 2 fans; fits in configurable rear doors, 115V inputMiddle Atlantic Products standard solid rear doors on WRK, MRK and ERK Series (pg. 35) enclosures are configurable for achieving optimal active or passive thermal management. Fan, vent and filter kits are available to install after laser knockouts are removed from door.Fan kit includes panel and two fansFits in configurable rear doors to provide active thermal management120V input voltage