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)
