I have used this model in my garage since I had it built and although it won't cool a 1500 sq ft building down to 75 degrees, it certainly is enough to take the edge off in those hot Florida summer days. Which is all I want from it. I have tried some other brands, and they just didn't push enough air, or the "cold" air coming out just wasn't really COLD. No, they won't last forever, but when one goes bad, normally because of fan noise building up, I just buy another of the same make and model, and that will do me just fine.