We have found in the summer that we can not live with out our table top fan. We spent some amount of time in a Wal-Mart studying the fan isle. They make your selection really pretty easy as they have so many fans running you can really check them out. We segragated each fan and tried it and we ended up with a medium priced fan that has now been with us two years. We have found that when our sleeper reaches the desired temperature and the rig master shuts down the sleeper gets styfeling. With the fan the air is always moving. We even use the fan when going down the road in the summer just to keep the sleeper cooler for sleeping.