This is a very mundane question, but has alot to do with the ultimate
condition of exterior walls and windows.  Is there such a thing as an air
conditioner holder -- a brace which fits in the window, serving as a platform
for the A/C, which is braced on the sill.  I'm talking large scale -- large
apartment building with 3600 windows --- I"d like to create a standard for
the building.

I have located a brace-type leg which extends out the window, then bends down
and back toward the exterior wall beneath the window sill.  I'd rather not
have anything braced against the wall.

You know, you go through this big restoration of exterior walls, windows,
finishes, etc., and then those god-awful things get plunked in there, and
forevermore drip down on your masterpiece of masonry restoration work...

any bright ideas for how to support small A/C condensing units hanging out of
apartment windows (other than attaching the thing on a platform to the
exterior wall adjacent to the window)? How do New Yorkers deal with this?