11
Ducting Information
GENERAL
When planning the path for ducting to the outside, keep in mind the following guidelines:
• Minimize use of elbows and transitions in ductwork as to maximize air flow to outside 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-IVH-48 REQUIREMENTS
• DCS recommends the use of 10” round ducting which provides 78.6 In.
2
of surface 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. (Example- 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” (52 In.
2
) to a 10”round (78.6 In.
2
) is not recommended]
DCS-IVH-36 REQUIREMENTS
• 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
DUCT ACCESSORIES
• 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" Island Vent Hood
18
5
/
8
"
11"