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A method and system of deflecting air circulated in a data center room are disclosed. A method for controlling air circulation within a room having an aisle between racks with computer systems mounted thereon comprises supplying cooling air to computer systems in the racks via holes in a floor of th

A method and system of deflecting air circulated in a data center room are disclosed. A method for controlling air circulation within a room having an aisle between racks with computer systems mounted thereon comprises supplying cooling air to computer systems in the racks via holes in a floor of the room and using a deflector to reduce flow of cooling air along the aisle toward an air intake of a cooling unit without passing the computer systems.

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We claim: 1. A method for controlling air circulation within a room having an aisle between racks with computer systems mounted thereon, comprising: supplying cooling air to computer systems in the racks via holes in a floor of the room; drawing the cooling air towards an air intake of a cooling un

We claim: 1. A method for controlling air circulation within a room having an aisle between racks with computer systems mounted thereon, comprising: supplying cooling air to computer systems in the racks via holes in a floor of the room; drawing the cooling air towards an air intake of a cooling unit; and providing a vertical deflector at an open end of the aisle to reduce a flow of the cooling air towards the air intake of the cooling unit prior to the cooling air being in proximity of the computer systems, wherein the deflector is positioned between the aisle and the air intake of the cooling unit, the deflector operable to displaceable force air over the top edge of deflector. 2. The method defined in claim 1 further comprising securing the deflector to prevent the deflector from creating an obstruction of access to and egress from the aisle, the deflector alternately displaceable to permit the access and egress. 3. The method in claim 1 wherein the deflector transverses the aisle in a plane perpendicular to a floor and perpendicular to a front or back side of one or more of the racks. 4. The method of claim 2 wherein the deflector extends from approximately the floor level to approximately the height of one or a plurality of objects that form the aisle. 5. The method of claim 1 wherein the deflector comprises a sheet of material. 6. The method of claim 1 wherein the deflector comprises a flexible curtain. 7. The method of claim 1 wherein all or parts of the deflector are transparent. 8. The method of claim 1 wherein a mounting device couples the deflector to one or more of the racks. 9. The method of claim 7 wherein the mounting device comprises a mechanism to allow movement of the deflector. 10. The method of claim 1 further comprising providing access to and egress from the aisle comprises rotation of the deflector around a vertical axis. 11. A system for cooling one or more devices in a room, the system comprising: a pair of racks supporting the devices and positioned to form an aisle there between; a perforated floor coupled to the pair of racks; an air cooling unit having an air intake and coupled to the perforated floor to push cooling air up through the perforated floor to the aisle; and a vertical deflector positioned at an open end of the aisle to reduce a flow of the cooling air towards the air intake of the cooling unit prior to the cooling air being in proximity of the devices, wherein the deflector is positioned between the aisle and the air intake of the cooling unit, the deflector operable to displacably force air over the top edge of the deflector, and further operable to prevent recirculation of cooled air from bypassing devices to be cooled. 12. The system of claim 11 wherein the deflector transverses the aisle in a plane perpendicular to a floor and perpendicular to a front or back side of one or more of the racks. 13. The system of claim 11 wherein the deflector extends from approximately the floor level to approximately the height of one or a plurality of objects that form the aisle. 14. The system of claim 11 wherein the deflector comprises a sheet of material. 15. The system of claim 11 wherein the deflector comprises a flexible curtain. 16. The system of claim 11 wherein all or parts of the deflector are transparent. 17. The system of claim 11 wherein a mounting device couples the deflector to one or more of the racks. 18. The system of claim 17 wherein the mounting device comprises a mechanism to allow movement of the deflector. 19. The method of claim 1, further comprising a plurality of deflectors disposed in a circumferential arrangement with the devices, the circumferential arrangement operable to enclose a perimeter of horizontal egress. 20. The method of claim 19 wherein enclosed perimeter defines a vertical barrier below which cooled air diverts to the devices. 21. A method for controlling air circulation within a room having an aisle between racks with computer systems mounted thereon, comprising: supplying cooling air to computer systems in the racks via holes in a floor of the room; drawing the cooling air towards an air intake of a cooling unit; providing at least one vertical deflector at an open end of the aisle to reduce a flow of the cooling air towards the air intake of the cooling unit prior to the cooling air being in proximity of the computer systems, wherein the deflector is positioned between the aisle and the air intake of the cooling unit, the deflector operable to displacably force air over the deflector, and further operable to prevent recirculation of cooled air from bypassing devices to be cooled; and securing the deflector to prevent the deflector from creating an obstruction of access to and egress from the aisle, the deflector alternately displaceable to permit the access and egress, the deflectors disposed in a circumferential arrangement with the devices, the circumferential arrangement operable to enclose a perimeter of horizontal egress for directing the air to the devices. 22. The system of claim 11 wherein providing access to and egress from the aisle comprises rotation of the deflector around a vertical axis.