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General
Ducting Information
DCS-IVH-48 Requirements
DCS-IVH-36 Requirements
When planning the path for ducting to the outside, keep in mind the following guide-
lines:
- Minimize use of elbows and transitions in ductwork as to maximize air flow to out-
side of building. An efficient airflow path contributes to the overall efficiency of the
Vent Hood.
- DCS recommends the use of
“smooth wall” ducting, not flexible ductwork.
- Transitions are required from rectangular to round ducting
(see transitions as shown below)
- Duct tape may be used at ducting joints.
- DCS recommends the use of 10
” round ducting which provides 78.6 In.
2
of sur-
face area.
- See Duct Accessories below on for ratio to 10
” transition.
- Alternate duct sizes in rectangular style may be used. If a rectangular duct style is
used, the duct must equal at least 78.6 In.
2
for best results. (
EExxaammppllee--
3 1/4”x 24”
duct = 78 In.
2
)
- Maintain consistent ducting square area as to avoid reduced air flow. [ie.- With a
IVH-48 Hood, connecting a 4
”x13” (
5522 IInn..
22
) to a 10”round (
7788..66 IInn..
22
) is not recom-
mended]
- DCS recommends the use of 7
” round ducting which provides 34.7 In.
2
of surface
area.
- Alternate duct sizes in rectangular style may be used. If a rectangular duct style is
used, the duct must equal at least 34.7 In.
2
for best results
- Wall Caps and Roof Caps must have free open area equal to duct size diameter.
- Note that a Sealed Back Draft Damper may reduce air delivery.
- Transition for right, left or rear air discharge also available.
10"
10
1
/2"
4
5
/8"
Vertical Duct Transition for 48" I
18
5
/8"
11"
11