No single air distribution system is ideally suited for the
heating and cooling needs of every house. In each case,
design and installation are affected by envelope construction
details, climate, cost, building and energy codes, noise levels,
and the need for zone control. All of these factors contribute
to the location of supply outlets and return openings and to
the duct geometry.
Locating Supply Outlets
The comfort afforded by a forced-air heating or cooling system
depends, in part, on whether the supply outlets are located
at the perimeter, on the ceiling, or on an inside wall.
Perimeter supply outlets blanket portions of the exterior
walls with supply air using floor, baseboard, or