Look into portable air conditioners. Go to or call an air conditioner company and ask questions about portable air conditioners. Here is a website to check out:
Yes it will work and it will not cause bubbles:- because hair & fabric conditioners are both oil based and will kill foam. Don't use too much because fabric conditioners contain approx 2-4% actives (& over 90% water) and Hair conditioners are approx ...
the heat created by the air conditioners cooling the cars makes the tunnels ridiculously hot. that phenomenon is also why the city itself is so hot in the summer. air conditioners put off a lot of heat.