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According to an embodiment of the present invention, there is provided a system for cooling. The system comprises an equipment rack installable in a facility and for accommodating a plurality of electronic equipment. The system further comprises an exhaust duct into which the electronic equipment, w

According to an embodiment of the present invention, there is provided a system for cooling. The system comprises an equipment rack installable in a facility and for accommodating a plurality of electronic equipment. The system further comprises an exhaust duct into which the electronic equipment, when installed in the rack, exhausts gas drawn from a first section of a facility. The system further comprises a gas flow meter for measuring gas flow in the exhaust duct, and a controller for generating control signals to control, based on the measured gas flow, the output of a cooling unit arranged to provide cooled gas to the first section of the facility.

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1. A system for cooling, comprising: a plurality of equipment racks disposed in a facility, each equipment rack having a front, two sides, and a rear, the plurality of equipment racks arranged into rows of racks with abutting sides and pairs of rows of racks arranged back-to-back defining a second f

1. A system for cooling, comprising: a plurality of equipment racks disposed in a facility, each equipment rack having a front, two sides, and a rear, the plurality of equipment racks arranged into rows of racks with abutting sides and pairs of rows of racks arranged back-to-back defining a second facility section separating each pair of back-to-back rows of side-by-side abutting racks, wherein the front of each rack faces a first facility section, each rack comprising: an exhaust duct to exhaust gas drawn through the rack gas from the first facility section; anda gas flow meter in the exhaust duct to measure gas flow; anda controller to control, based on the measured gas flow of each gas flow meter, an output flow of a cooling unit;wherein the system provides cooled gas to the first section of the facility. 2. The system of claim 1, wherein the controlled output flow of the cooling unit is based on a highest measured exhaust gas flow of each rack. 3. The system of claim 1, wherein the controller generates control signals to control a plurality of gas cooling units to provide cooled gas to the first section of the facility. 4. The system of claim 1, further comprising a panel structure disposed at ends of the pairs of back-to-back rows of equipment racks, wherein the first section of the facility and the exhaust duct of each rack is fluidly separated. 5. The system of claim 1, wherein each equipment rack comprises electronic equipment having a heat generating source and a variable flow ventilator, the variable flow ventilator to draw gas from the first section and to exhaust gas into the exhaust duct. 6. The system of claim 1, wherein the gas cooling unit cools air from the second facility section. 7. The system of claim 1, wherein the exhaust duct vents into open atmosphere. 8. The system of claim 1, wherein the facility is a data center, and wherein each equipment rack comprises at least one electronic device comprising at least one of: a computing device, a network device, a communication device, a power supply, and a storage device. 9. A method of cooling in a facility comprising a plurality of equipment racks, each rack having a front, two sides, a rear, and a rack exhaust duct, wherein the plurality of equipment racks are arranged into rows of racks with abutting sides and pairs of rows of racks arranged back-to-back, defining a second section of the facility separating each pair of back-to-back rows of side-by-side abutting racks, wherein the front of each rack faces a first section of the facility, andwherein each rack accommodates a plurality of electronic equipment and each of the plurality of electronic equipment comprises a variable flow ventilator, the method comprising:each variable flow ventilator drawing cooled gas from the first section of the facility through each of the plurality of electronic equipment in each equipment rack and exhausting the gas to the second section of the facility through the rack exhaust duct;determining the gas flow in each rack exhaust duct; anda controller controlling the output of a gas cooling unit providing cooled gas to the first section of the facility based on the determined gas flow in each rack exhaust duct. 10. The method of claim 9, wherein each of the plurality of equipment racks comprises a gas flow meter, wherein controlling the output of the gas cooling unit comprises controlling the gas cooling unit based on one of a highest determined gas flow and an average of the determined gas flows from the gas flow meters. 11. The method of claim 9, wherein the facility comprises a plurality of gas cooling units, and the providing cooled gas to a first section of the facility comprises controlling the plurality of gas cooling units. 12. The method of claim 9, wherein the controlling the output of a gas cooling unit is based on an average of the gas flow determined in each exhaust duct. 13. A data center comprising: a plurality of electronic equipment disposed in at least one equipment rack, the plurality of electronic equipment comprising a variable flow ventilator, a gas inlet, and a gas outlet, the variable flow ventilator to draw gas through the gas inlet and to exhaust gas through the gas outlet;the data center to draw gas through the plurality of electronic equipment in each rack from a first section of the data center, and to exhaust gas from the plurality of electronic equipment in the rack into an exhaust duct;the data center further comprising: a gas-flow measurement device located in the exhaust duct to measure the gas-flow therein; anda controller to control the gas flow of a gas conditioning unit based on the measured gas-flow, the gas conditioning unit to supply cooled air to the first section. 14. The data center of claim 13, wherein each equipment rack comprises a plurality of equipment racks, each equipment rack having a front, two sides, and a rear, the plurality of racks arranged into rows of racks with abutting sides and pairs of rows of racks arranged back-to-back defining the first section separating each pair of back-to-back rows of side-by-side abutting racks, wherein the front of each rack faces the first section. 15. The method of claim 9, wherein the controller adds a predetermined offset amount to the determined gas flow in each rack exhaust duct to ensure a positive air pressure is maintained in the first section compared to the rack exhaust duct.