On 2006-07-14, Eric in North TX wrote:

Vent; I plan to run it out the wall behind the unit, curious if I
need to get it above the roof.

My understanding is that a direct vent appliance typically has its
vent terminated at the side wall and that there is no need to get
above the roof. The appliance's manual should list the necessary
clearances between the vent termination and varous other features of
the house.

BTW, if you live in a climate where it never freezes, consider an
exterior model, it makes venting very easy.

Cheers, Wayne