AC power ratings are a bit weird but pretty much what you've said. Its very hard to predict what temperature it will be able to hold but it would do what you're asking.
In bitcoin mining, you should avoid AC at all costs because it adds about 35% again to your power bill. The best solution is to exchange air to ambient, ie collecting and exhausting hot air to outside or open windows etc.
Totally agree about usage of AC but at the moment i can do it. What are you suggestions/setup/position of GPU rig to collect the hot air and remove it as fast as possible (like https://youtu.be/2rQ-YIDmsBc from Toom.IM) ?
That's designed for a much, much greater capacity but the idea is the same. Collect hot air with some form of ducting connected to an extractor fan. Look at dryer ducting for some ideas, order about a trillion meters of tape and see what you can come up with.