Ductwork installed under a concrete slab using PVC sewer pipe.
Optional ductwork installed under a concrete slab into a window well.
Do not vent a gas cooktop into a window well,
6” | round | PVC | transition |
12” minimum |
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| 6” round metal duct |
concreie |
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| 6” round | |
slab |
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| I | PVC sewer |
6” min. | Tiahtlv | pipe elbow | |
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6” rouhd | r |
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gravel | or sand |
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PVC | completely |
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coupling | around | pipe. |
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Seal the space between the outside of wall cap inlet inside of PVC coupling with caulking metal.
Maximum length of ductwork system
For best performance, use no more than three 90” elbows. If more than one elbow is used, make sure that there is a minimum of 24 inches of straight duct between any two elbows. Do Not install two elbows together.
It is recommended that you use round duct instead of rectangular duct, especially if elbows are required. If rectangular duct is required, it should be transitioned to 6” round duct as soon as possible.
Determining the length of system you need
To calculate the length of system you need, add the equivalent feet for each duct piece that will be needed. See example for 6” round ductwork system.
Now start...
With downdraft vent in kitchen.
1 n Put on gloves and safety glasses. Place cardboard or another form of protection on top of a flat surface where you can easily assemble the downdraft vent system. Remove parts packages, downdraft vent and blower box from carton. Remove all shippina materials, tape and protective film fro’& downdraft vent and blower box.
2 w Attach one overcounter
mounting bracket to each side of the downdraft vent with flange side out.
3 w Attach supper? legs to side of downdraft vent with two screws in each leg. Do Not tighten screws.
Injury Hazard
Use two or more people to move and safely install vent system.
Failure to follow this instruction can result in back or other injury.
4 w Carefullv insert downdraft vent into countertop cut&t. Two people are
recommended to support the weight of the downdraft vent during lifting. Check that downdraft vent is parallel to side of cutout and that mounting brackets overlap countertop.
6 H Determine which direction (down or rear) ductwork will need to run from blower duct when installed in cabinet.
Down venting:
Downdraft vent is shipped with blower in down venting position so no modification is required. Go to Step 7.
left or right venting:
a. Remove 4 hex nuts that attach blower box to downdraft vent base. Remove blower box.
b. Rotate blower box 90” to left or right so that vent blower is repositioned in the direction needed.
c. Reattach blower box to downdraft vent base with 4 hex nuts.
Rear venting:
a. Remove 4 hex nuts that attach blower box to downdraft vent base. Remove blower box.
b. Note how wiring cable is installed under plastic clips inside vent base. Then carefully remove wiring cable from plastic clips.
Disconnect blower wiring cable.
c. Remove 6
bracket for real venting
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d. Remove screws attaching brackets to each side of blower. Reposition brackets on blower as shown. Then reinstall screws.
e. Reinstall blower in blower box with mouth of blower pointing out open side of blower box. Secure blower to blower box with 6
NOTE: Square metal frame attached to mouth of blower must be installed for proper operation.
f. Attach metal cover from parts bag over
6” round ductwork system
6ft.-4
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| Maximum length = 25 ft. | w Move support legs down against | ||||||||||||||
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| = | 0 | feet | cabinet | floor. PI&e | a | le;el | of | |||||||||
| downdraft | vent base and adjust until |
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8 feet | straight | = | 8 | feet |
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downdraft | vent | is level | vertically. Use a | ||||||||||||||
2 - 90” | elbows | = | 10 | feet | |||||||||||||
pencil | to mark | the top | of | each | leg | on | face | ||||||||||
Transition |
| = | 4.5 | feet | of downdraft | vent. | Then | mark | location | of | |||||||
Length | of | 6” system | = | 22.5 | feet | support | leg | mounting |
| holes on | cabinet |
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| floor. Remove downdraft vent from cutout. | |||||||||||
Recommended | standard | fittings | Drill starter holes at each mounting screw | ||||||||||||||
location | on | cabinet | floor. | Align | top | of | legs | ||||||||||
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| :i:: | vent. | Tighten | screws | in legs. |
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| If blower | box is removed | from | vent | base, | |||||||||||
| check | that | wiring cable | is properly | secured | ||||||||||||
10” | lO”to6” | in plastic | clips. |
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to 6” = 4.5 ft. | 90” elbow | = | 5 ft. | 90” elbow = 9 ft. |
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PO; ;,lbow
g. Reconnect blower wiring cable. Secure wiring cable in 2 black plastic clips inside vent base. Reattach blower box to downdraft vent base with 4 hex nuts.
7 w Attach backdraft damper over blower box knockout with 2
8 n Remove the 2