Okay well in light of recent posts, perhaps we should clarify...
Is this 86 degrees an occasional issue, or is this something that is happening all the time?
If it's happening all the time, then a chiller may be an unfortunate necessity, if you can't get enough reduction with fans or cannot turn down the house temperature enough to keep it under control.
If it's an occasional thing, then floating ice, etc are all ideas that can help.