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J-Rod

Whirlpool Gold GZ7936XHS-0 downdraft vent - ideas to seal it better

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I have a standalong downdraft vent Whirlpool Gold GZ7936XHS-0 that is separate from the stove itself.  It goes out via a 6" duct . The ducting for it goes down  into the slab, makes A 90º turn and the goes across the kitchen.  It comes back up through the slab up by the outside wall, and makes another 90º and exits out through the outside wall. I am about to replace the outside flapper vent which is just a cheap plastic vent like you find for a dryer. THats all that stops it from venting into the house. 

 

My issue is I get a lot of draft,and a lot of outside air that seems to vent into the downdraft.  I am looking for any better ways to seal it other than just the outside vent.  If I can't I may just cap it and be done with it.

 

Looking for any suggestions.

 

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Need appliance parts? Call 877-803-7957 now!

total length ?

 

Installation Instructions - 8284826

http://appliantology.org/files/file/186-kitchenaid-30-36-retractable-downdraft-vent-systems/

 

Maximum length of vent system

Vent                             Length
6" round                       35 feet
3-1/4" x 10"                   35 feet

 

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" of straight vent between any two elbows.

Do Not install two elbows together.

It is recommended that you use round vent instead of rectangular vent, especially if elbows are required.

If rectangular vent is required, it should be transitioned to 6" round vent as soon as possible.


 

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Total system length is approximately 12'.  There are 3 90º elbows. Its all 6" round duct.  Basically itcomes out of the downdraft square and has a sheetmetal adapter to adapt it to the round pipe.  The issue is the hot or cold air from outside drafting in. Looking for better ways to seal the system and prevent airleaks from outside as its totally dependant on that one 6" flapper to close it off.

 

Thank you for the instal instructions. I'll see if they have anything else.

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