"Ron" wrote
Then perhaps you can explain to me while during the summer (expect at
night) when I turn on the cold water I get warm and then HOT water? I
have to let it run for over a minute just to get cool water. My
neighbors that don't had direct shade on their roofs from trees have
the same problem. A friend of mine that had his house re-plumbed (so
his pipes are now in his attic) has the *same* problem.

Attics are not heated or cooled to house temperature. In summer, they
become solar heaters so the water gets rather warm. In the north, you'd
never plumb a house that way because the pipes could freeze in winter.




Most of who? Are you saying that you know where most people keep their
thermostats set? Anything below 78 degrees is just wasting
money....IMO

That is a blanket statement that does not apply to everyone. In Arizona when
it is 115, keeping the house at 78 sounds good. In other rather humid
environments we turn the AC on when it gets to 78 inside. We get the temp
down to 70 to 72 and get rid of the humidity.