Originally Posted by
esa-aardvark
bksmith
Depending on what part of the system was dropped it might contain electrical and or pressurized equipment
I am in the middle of installing a small airco. Indoor unit contains some nitrogen. Outdoor unit
contains pressurised R290 (=propane). Large commercial units will be different or empty.
Too cold for me to work outside & verify.
esa-aardvark I understand that I was replying to Rotorookie in post #25 who commented that it was only sheet metal so it was ok.