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19
DUCT INFORMATION
GENERAL:
When planning the path for ducting to 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 effective
airflow path contributes to the overall efficiency of the
Vent Hood.
Capital recommends the use of smooth wall ducting, not
flexible ductwork.
Transitions are required from rectangular to round ducting.
Capital’s PSVH Blower requires one of the following 4-1/2” x 18” to 10” round transitions
(purchased separately)
Model PSVH - Vertical
Model PSVH - Rear discharge
Model PSVH - Left discharge
Duct tape may be used at ducting joints.
CAPITAL VH-36/48/60 Capital 12-36 REQUIREMENTS:
Capital recommends the use of 10” round ducting which provides 78.6 sq. in. of surface area.
Alternate duct sizes in rectangular style may be used. If rectangular duct style is used, the duct
must equal at least 78.6 sq. in. for best results. (Example 3-1/4” x 24” duct =78 sq. in.)
Maintain consistent ducting square area as to avoid reduced air flow. (Example with a VH-48 Hood, connecting a 4” x
13” 52 sq. in
. to a 10” round 78.6 sq. in. is not recommended)
CAPITAL VH-24/30 REQUIRMENTS:
Capital recommends the use of 7” round ducting which provides 34.7 sq. in. of surface area.
Alternate duct sizes in rectangular style may be used. If rectangular duct style is used, the duct must equal at least 34.7
sq. in. 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.
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