Is Outside Air Cooler?
Some locations in Asia offer potential of free cooling

Economizers Lower energy usage Lessen wear and tear on precision air conditioning equipment Decrease operational costs Air-side economizers Control mechanism to regulate the use of outside air for cooling in a room or building Fluid-based economizers Works in conjunction with a heat rejection loop consisting of a cooling tower, evaporative cooler or dry cooler Limited Application in Asia With a few exceptions Asia mostly too hot to benefit from free cooling