We live in Sac Ca part of the summer and Yuma AZ during the winter and have a large swamp cooler in each house. Also have A/C in each but seldom use them. It is 100 % right now here outside Sac and I have the swamp cooler on low and it is 72 degrees. The house here in Sac is 1700 sf and the one in Yuma is 1550. I run the one in Yuma on low and it stays in the high 60s and low 70s. Much cheaper to run and low maintenance. Both coolers are under shade. The one in Yuma is used from Nov thru Mar which are cooler months. It would never work during the summer. Each cooler was used and bought in Yuma for $100 each and have not spent a penny on the one in Cal in the last 5 yrs and had to replace a belt on the one in Yuma in the last 4 + yrs