Thanks all for the replies. Sometimes logic just isn't enough.
But it's been draining fine for nearly 20 years....the new buyer will just
have to live with it working OK.
:-)



"American Mechanical" wrote in message
m...

"Curmudgeon" wrote in message
...
I'm selling a house where the indoor airhandler for the heat pump has a
vertical condensate drain that runs thru the floor into the crawl space.
It
was installed that way new.
Now, an inspector for the buyer lists that drain as a "fault" because it
is
not trapped.
Does a vertical drain need to be trapped.
I'm not going to replace it, but now I'm curious if the inspector's
right
or not.

It needs to be trapped. Most heat pump air handlers have the coil on the
negative side of the blower. As indicated by other responses, air will
flow
from out to in and many times causes problems draining as well as the
efficiency side effects.

Pro AC tech opinion requested ( since I dare not ask this question on
their
newgroup).

We thank you for posting in the appropriate forum since many of us also
read
this NG for the very purpose of trying to help homeowners.

- Robert