Ok your reply makes no sense to me (see first line of my original comment). I don't understand why you'd be putting a generator test load through the servers i

Ok your reply makes no sense to me (see first line of my original comment). I don't understand why you'd be putting a generator test load through the servers in addition to the normal power supply??? Why would you do that??? I would have thought that you have normal operation going on in the datacentre, normal cooling infrastructure, normal power coming in. Then the generators turned on with their in built cooling, then them delivering power to the test area and not the datacenter - which is then the only additional area you'd need to cool. Seems like dealing with the heat would be not that hard, but perhaps I have too much faith in engineers? :-) Even just a massive heating element in a tank of water, giant kettle style would work wouldn't it? Big kettle mind you, but big tank too. Seems like a cheap way to test the generator at full load for an extended test?