Personally I would like to know about the question about the registers, which as
far as I can tell was not addressed. You people just went straight to insulting
the guy or anyone who did not insult the guy. If the home owner wants to close
off a room it's not a character flaw. Also hvac has isn't rocket science. The
worst that can happen if you close off a room or rooms is you might affect your
utility bill. Anyone technically adept can design and build their own system.
That's why you can buy Goodman etc without a license. The only thing you "need"
a licensed have guy is for freon issues. Any reasonable arguments?