Got the adapter at local HVAC supply place. They sell them at the highseer website. Noticed a slight spike in the electric bill this month cause of the 100+ temps in Texas, but nothing out of the norm. It's an A/C & Heat pump, so it will work well in the winter too. Had a friend who knows a former ac guy come out at do it for me. After killing the compressor by (myself) trying to start it without a vacuum, he replaced the compressor and put r410 in for $150, which was LOWER than any quote I got locally. Most places don't want to touch stuff they don't install. I have somewhat basic skills, and had it installed and hooked up to my breaker in about 6-8 hrs, stopping for food and such. Biggest PITA was putting the hole in my wall. Running the lines and electrical was pretty self explanatory. Used some flexible conduit to run the power lines to my breaker box, with a 20amp breaker. This thing kicks ****, and is cheaper than the Mits and LG units. So far, I love it.