Stormin Mormon wrote:
Might need to put a 45 degree angle piece on the exhaust, to
help shield from rain.

Actually, on mine, the installation
instructions require a 90 on the
output. I asked why. The rep said it
was to prevent wind from
causing back pressure in the combustion
area. He said this could
cause the unit to shut down. And he
said, a 45 was not
adequate because air could still blow in.