I have used one of these for 4 years in my Florida Room on my converted patio! It has performed very Well. I had to run a Dedicated 20amp circuit for it though. Mine is a Haig. I love it and when used correctly it works well. I usually open the windows in the daytime for air flow to help the outdoor room cool a bit then close them when I turn it on. Sitting here right now at a nice 67 degrees! My only complaint is having to swap it in the winter for a Heater! Course they make a combo unit now!