just a tip on A/C usage...many people will turn their air conditioners on when they come home, or only when it's miserably hot. then they turn them back off, and repeat the cycle. these people probably don't fully understand how A/C works. remeber, you're not putting in cold...you're removing heat and humidity via the liquid and physical reaction of the system...so keeping that in mind...if you turn off your air(thinking, "i'm not home,i don't need it on")what happens is, all of your furniture,carpet,pillows,clothing, everything begins to absorb moisture and humidity along with heat. now when you turn it "ON" it runs constantly, just to try and get near what you want it to feel like. My Advice is...it's far more economical to leave your air conditioner on 24/7 and adjust the temperature! hope it helps.