A server cooling system comprising a first space defined by a floor, one or more lateral walls, and a ceiling; a third space defined by the ceiling and a roof; one or more valved openings located on at least one of the one or more lateral walls; an enclosure installed within the first space, and defining a second space operably connected to the one or more valved openings and the third space; one or more valved ceiling openings located on the ceiling operable to exchange air between the third space and the first space; one or more air-handling units located on at least one of the lateral walls and configured to draw external air into the first space through at least one of the one or more openings located on at least one of the lateral walls; one or more valved openings connecting the third space with outside of the server cooling system and configured to exhaust heated air out of the server cooling system; and a rack installed in the first space and engaging the enclosure in a substantially sealed manner, wherein one or more rack-mounted units installed in the rack such that front faces of the rack-mounted units interface with the first space, and that back faces of the rack-mounted units interface with the second space, one or more cooling fans in the rack are operable to draw air from the first space through the front faces of the one or more rack-mounted units and expel heated air through the back faces of the one or more rack-mounted units to the second space, one or more connectors operable to allow the heated air to pass from the second space into the third space, and the roof is sloped relative to the floor. a first space defined by a floor, one or more lateral walls, and a ceiling; a third space defined by the ceiling and a roof; one or more valved openings located on at least one of the one or more lateral walls; an enclosure installed within the first space, and defining a second space operably connected to the one or more valved openings and the third space; one or more valved ceiling openings located on the ceiling operable to exchange air between the third space and the first space; one or more air-handling units located on at least one of the lateral walls and configured to draw external air into the first space through at least one of the one or more openings located on at least one of the lateral walls; one or more valved openings connecting the third space with outside of the server cooling system and configured to exhaust heated air out of the server cooling system; and a rack installed in the first space and engaging the enclosure in a substantially sealed manner, wherein one or more rack-mounted units installed in the rack such that front faces of the rack-mounted units interface with the first space, and that back faces of the rack-mounted units interface with the second space, one or more cooling fans in the rack are operable to draw air from the first space through the front faces of the one or more rack-mounted units and expel heated air through the back faces of the one or more rack-mounted units to the second space, one or more connectors operable to allow the heated air to pass from the second space into the third space, and the roof is sloped relative to the floor.