why the fuck would you make a DC in bangkok! where is 28 degrees Centigrade at 9AM, right now!!! WHY!!!
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Miners don't particularly mind hot ambient, and because you're not running AC neither do you particularly. Instead of replacing the air with an infinite amount of 20C air, you're replacing it with an infinite amount of 30C air.
I'll drive constantly at 200miles/hour just because my car can do that! I dont give a fuck about road conditions or tires...
better 10cents/kw in a 0C temperature climate than in that location with +30C temperature and 6cents/kw!
Based on what? If you're able to bring enough 30C air in to feed the units and keep them cool, there's no real need for the 0C air. Yes you could run the fans a little slower and save a bit on your cooling costs, but you're talking maybe a percent on of your budget. Nowhere near enough to justify 10c vs 6c.