Oval
pipe and fittings are primarily used for air
distribution runs in interior walls to convey conditioned air to upper
stories. The slim profile allows for use in standard stud wall
cavities and in joist spaces between floors. The nominal size of
oval has a cross sectioned area that is less than that of the
corresponding size of pipe. Review both of these charts to make sure
of correct sizing. Typical application; round takeoff to round pipe
from duct. The round pipe makes a transition to oval by using a 859.
Oval pipe is attached to the other side of the 859 and continues up
between the stud spaces in an interior wall to the second floor.
OVAL SIZE/CAPACITY COMPARISON
SIZE
OVAL
ROUND
WALLSTACK
5".......17.2 Sq. In......19.6........26.0 (3 1/4 X 8)
6".......22.2 Sq. In......28.3......32..5 (3 1/4 X 10)
7".......27.2 Sq. In......38.5.......39.0 (3 1/4 X 12)
