I have a portable air conditioner in my growroom. Be careful which ones you choose. My first, an LG 10,000 BTU model, was horribly inefficient, and, no joke, it was as loud as a 747 on take off! I couldn't stand to be in the growroom for more than 5 minutes!That thing raised my power bill $80 a month!
I've since replaced it with a more efficient model a Whynter 11,000 BTU. It uses less than 1/2 the power of the LG, and is quieter than any of my window model air conditioners! It is a 2 hose model ( all the more efficient ones use 2 hoses ) with built in dehumidifier. I'm very pleased with this one. So it pays to look into reviews in depth to really get the story on these products.