A server cooling system, comprising an enclosure that is inside of a room, wherein the enclosure defines an interior space and comprises a plurality of rack ports, the enclosure further comprising: a top crossbar extending horizontally across and proximal to an upper edge of one of the plurality of rack ports; and a bottom crossbar extending horizontally across and proximal to a lower edge of one of the plurality of rack ports; a cooling module operative to supply cooling air to the interior space defined by the enclosure; a plurality of racks configured to be engaged by the rack ports, each rack including a top crossbar and a bottom crossbar and one or more rack-mounted units installed in the racks, wherein the racks are engaged in the plurality of rack ports such that respective front faces of the one or more rack-mounted units interface with the interior space defined by the enclosure; one or more cooling fans operative to draw air from the interior space through the respective front faces of the one or more rack-mounted units and expel heated air from the one or more rack-mounted units; and a plurality of hookup clips (606, 616) securing the crossbars of the racks to the respective top or the bottom crossbar of the enclosure, wherein each of the hookup clips has a U-shaped profile with an axis of symmetry perpendicular to a floor of the room and wherein the each of the hookup clips comprises: one or more pin members (706, 806); and one or more sockets for receiving the pin members (704, 804), wherein the hookup clips (606, 616) are configured to operate as clasp members to secure one of the crossbars of the racks to the respective top or the bottom crossbar of the enclosure through the pin members in the sockets a top crossbar extending horizontally across and proximal to an upper edge of one of the plurality of rack ports; and a bottom crossbar extending horizontally across and proximal to a lower edge of one of the plurality of rack ports; a cooling module operative to supply cooling air to the interior space defined by the enclosure; a plurality of racks configured to be engaged by the rack ports, each rack including a top crossbar and a bottom crossbar and one or more rack-mounted units installed in the racks, wherein the racks are engaged in the plurality of rack ports such that respective front faces of the one or more rack-mounted units interface with the interior space defined by the enclosure; one or more cooling fans operative to draw air from the interior space through the respective front faces of the one or more rack-mounted units and expel heated air from the one or more rack-mounted units; and a plurality of hookup clips (606, 616) securing the crossbars of the racks to the respective top or the bottom crossbar of the enclosure, wherein each of the hookup clips has a U-shaped profile with an axis of symmetry perpendicular to a floor of the room and wherein the each of the hookup clips comprises: one or more pin members (706, 806); and one or more sockets for receiving the pin members (704, 804), wherein the hookup clips (606, 616) are configured to operate as clasp members to secure one of the crossbars of the racks to the respective top or the bottom crossbar of the enclosure through the pin members in the sockets one or more pin members (706, 806); and one or more sockets for receiving the pin members (704, 804), wherein the hookup clips (606, 616) are configured to operate as clasp members to secure one of the crossbars of the racks to the respective top or the bottom crossbar of the enclosure through the pin members in the sockets