I only turn on the air when it gets above 30 with the humidity. Humidity is not causing a problem then it is OK. If it wasn't for our cat we probably wouldn't put it on. He gets way too hot. Our back patio stays open at night in the summer and we turn the ceiling fan off in that area so the cool air can sink in. Then in the morning, I try to trap the cool air in the house. We have really great blinds to block out the Sun during the hottest parts of the day.