john wrote:

"Al Reynolds" wrote in message
...
"Al Reynolds" wrote:
http://www.bat400.com/diy/repl?acing-sealed-units.htm

But for some reason (OE?) the link came through as mangled
when I read my post. It should be:
http://www.bat400.com/diy/replacing-sealed-units.htm

Al

Why is perfectly good glass replaced in this age of recycling?

Why can't the panes be separated, cleaned and then re-engineered into a
unit?? No glass cutting or supplies needed (other than the edges).

Because getting the panes off is decidedly non-trivial.
The glue is rather tenacious.
And, you've got to get all traces of it off, or the new pane may fog.
And if you just throw the glass in a glass recycling bin, it takes relatively
little energy to remake it.