: Anyone know if a window unit can be stored on it's side or end
Yes, they can, but ... first they should be allowed to "rest" a
few hours to equalize the pressures, and they should be stored
where they won't be bumped and moved around or vibrated.
If they must be stored unlfat, it's best to store them on their
back, with the outside face down. Be careful nothing is under it
to distort the fins though.
I've done it for years - haven't had a failure yet, period, of
any ac I had with the exception of a 1983 model finally corroded
thru the pipe in the back side when I tried to wash out the
debris with a hose. I don't use a hose full force anymore <g>.