Loading ...
Loading ...
Loading ...
5
EQUIVALENT NUMBER
DUCT PIECES LENGTH x USED = LENGTH
5HFWDQJXODUWR5RXQG )W [ )W
7UDQVLWLRQ$GDSWRU
:DOO&DS )W [ )W
(OERZ )W [ )W
(OERZ )W [ )W
(OERZ )W [ )W
(OERZ )W [ )W
5RRI&DS )W [ )W
Straight Duct 6s5RXQGRU )W [ )W
3
1
»4s x 10s5HFWDQJXODU
Total Ductwork = Ft.
Equivalent lengths of duct pieces are based on actual tests
and reflect requirements for good venting performance with
DQ\YHQWKRRG
IMPORTANT: If a rectangular-to-round transition
adaptor is used, the bottom corners of the
damper will have to be cut to fit, using the tin
snips, in order to allow free movement of the
damper
.
Installation Instructions
NOTE: ,I\RXQHHGWRLQVWDOOGXFWVQRWHWKDWWKHWRWDO
duct length of 3
1
»4Ǝ[ƎUHFWDQJXODURUƎGLDPHWHUURXQG
duct should not exceed 140 equivalent feet.
2XWVLGHYHQWLODWLRQUHTXLUHVD+22'(;+$867'8&7
5HDGWKHIROORZLQJFDUHIXOO\
NOTE: It is important that venting be installed using
the most direct route and with as few elbows as possible.
7KLVHQVXUHVFOHDUYHQWLQJRIH[KDXVWDQGKHOSVSUHYHQW
blockages. Also, make sure dampers swing freely and
nothing is blocking the ducts.
Exhaust connection:
7KHKRRGH[KDXVWKDVEHHQGHVLJQHGWRPDWHZLWK
a standard 3
1
»4Ǝ[ƎUHFWDQJXODUGXFW
If a round duct is required, a rectangular-to-round
transition adaptor must be used. Do not use less than
a 6Ǝ diameter duct.
Maximum duct length:
)RUVDWLVIDFWRU\DLUPRYHPHQWWKHWRWDOGXFWOHQJWKRI
3
1
»4s x 10s rectangular or 6s diameter round duct should
not exceed 140 equivalent feet.
Elbows, transitions, wall and roof caps,
etc., present additional resistance to airflow and are
equivalent to a section of straight duct which is longer
WKDQWKHLUDFWXDOSK\VLFDOVL]H:KHQFDOFXODWLQJWKHWRWDO
duct length, add the equivalent lengths of all transitions
and adaptors plus the length of all straight duct sections.
7KHFKDUWEHORZVKRZV\RXKRZWRFDOFXODWHWRWDO
equivalent ductwork length using the approximate feet of
HTXLYDOHQWOHQJWKRIVRPHW\SLFDOGXFWV
Loading ...
Loading ...
Loading ...