Is the apartment building heated by a furnace or a boiler? There is a
difference.

If it's actually heated by a boiler, you may have a cracked section above
the water line.

"Ray" wrote in message
news:SGAXd.32041$QQ3.19993@trnddc02...
I live in an old six-unit apartment building which is heated by
oil-burning
furnace.

For most of the time on cold days, we can see a fair amount of steam
coming
out of the chimney.

Obviously some heat is being lost. The question is whether this is normal.
I
don't recall seeing this steam coming out of other older buldings in our
area.