I’d been utilizing portable air conditioners.  After much research I purchased the 14,000 BTU dual converter window air conditioner.  My friend installed while I supervised :).  He was very impressed with the ease of installation and how well built the unit is.  My home is 100 years old and it cools the entire lower floor.  It’s easy to use and I highly recommend this AC.  Temperatures hitting 100 degrees next week and I’m ready.