I have central air at my beach house and the unit for the top floor couldn't handle the sun and the temperature would go up to 80 during the day. The A/C would run all day until 1am or so before it would get back down to 72. We have southern exposure so the house is in the sun all day. The Global portable air conditioner (14000 BTU) was purchased and hooked up and it's been great. My temperature upstairs rarely goes above 72 now and if it does it drops down in less than an hour. The central air unit now cycles on off all day long like it should. I've been absolutely thrilled with the results. Thank you for making such a great product! Instead of paying thousands to replace the central air unit, I paid $600 including shipping and solved the problem!