IPSO T30 - Manual (Page 15)

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Tumblers – T30 and T45
14 4-08-43
NOTE: Do not install wire mesh or screen in
exhaust duct opening to avoid lint build-up or
impacting proper discharge of air from tumblers.
NOTE: Where exhaust duct pierces a combustible
wall or ceiling, the opening must be sized per local
codes.
NOTE: Inside of duct must be smooth. Do not use
sheet metal screws to join sections.
Consult your local building code for regulations which
may also apply.
Manifold Venting
While it is preferable to exhaust tumblers individually
to the outdoors, a main collector duct may be used if it
is sized according to Figure 4 or Figure 5. This
illustration indicates minimum diameters, and should
be increased if the collector length exceeds 14 feet (4.3
m) and two 90° elbows. The diameter of a round duct
must be increased by 10% for each additional 20 feet
(6.1 m). Cross sectional area of a rectangular or square
duct must be increased 20% for each additional 20 feet
(6.1 m). Refer to Table 2 or Table 3 to determine
equivalent ducting sizing. The collector duct may be
rectangular or square in cross section, as long as the
area is not reduced. Provisions MUST be made for lint
removal and cleaning of the collector duct.
TMB2103N
1 Removable strip of panel in framing wall to permit removal of tumbler from framing wall
2 Partition or bulkhead
3 Minimum distance between exhaust opening and roof, ground or other obstruction: 36 in. (914 mm)
4 2 in. (51 mm) minimum clearance on both sides of duct
5 Exhaust airflow – maximum length of duct: 14 ft. (4.3 m)
Figure 2
TMB2103N
1
2
3
4
5