This means that efficiencies of 85 percent are achieved from the trigeneration plant. The chilled water is supplied to the air-handling units, which supply the cooled air for the electronic equipment in the new building, which houses the test switch centre on the ground floor and the data centre on the first floor. The cooling of a data centre is said to be one of the most expensive process of its operation, with between 700kw/m2 and 1400kw/m2 required for air-conditioning of the area. MTN has been able to register the tri-generation plant project as a carbon credit project with the United Nations, which also assisted in offsetting the costs associated with purchasing the gas and the tri-generation plant.