The bracket think need change becos of new model...old MIT model was 12 years old.
Power indoor this one about 8000BTU X 2units..
Upgrade dunno leh...
Ya R22 old gas, know also year 2016 old gas no more supply, BUT, i think not so serious as no more overnight...can last for 10years enough. IF no more R22, then thousands of commercial buildings and Mall using R22 will be in big trouble...haha..