blueman writes:

- Are their egos so low and are they so threatened by an occasional
DIY that they have to go into "attack" mode?

Heh, Blueman, you're on the right track... Perhaps not so much
threatened as "taking the opportunity for subject matter bullying."

And boy do they get really ****ed if someone starts making more sense
than them. It's kinda cute, and pathetic all at the same time.
Fascinating psychology in that ng--inmates running the asylum.

"blows but does not heat" would actually be an apt description of
these less-than-helpful and more vocal miscreants in alt.hvac. In an
industry with "professionals" like this, homeowners need to be more
armed than ever with knowledge to help themselves.

Toodles,
--
Todd H.
http://www.toddh.net/