Help with exhaust vent in garage??

[Garthok]

Hey all-
I'm putting this out there in hope of help from people who know how. I'm fairly handy with tools but know nothing about duct work/exhaust fans etc so rather than stumble though it I'm hoping someone knows exactly what I need.
My garage in ATL is HOT so I would like to put an exhaust fan in the wall to vent directly to the outside and I was going to put some adjustable vents in the garage to to allow airflow in.
My kitchen stove has an overhead fan that vents directly through the garage and right to the side of the house so I'm thinking I could somehow tap into this duct work? The exhaust flap on the outside of the house is passive and open only when the stove fan is on. I was thinking I could replace this with a fan and somehow tap into the duct work. Is this possible and the best/easiest way? How would I stop the air from being sucked in from the kitchen though when the exhaust fan was on in the side of the house venting the garage?
Pictures attached...
Thanks-

 

[gregtwojeeps]

Mnnnnnnnnnnnnnmmm. not really kosher in my opinion. Never want a "conduit" to be able to transfer fumes from the garage back in to the home, the old negative pressure thing. How about go with one similar in the pic ?

 

[Garthok]

Mnnnnnnnnnnnnnmmm. not really kosher in my opinion. Never want a "conduit" to be able to transfer fumes from the garage back in to the home, the old negative pressure thing. How about go with one similar in the pic ?

Good point. Doesn't seem like taping in is a viable option damnit...

 

[reds]

Good point. Doesn't seem like taping in is a viable option damnit...

Another problem is compromising any fireproofing between garage and living area.

 

[Marctrees]

Not only probably against codes due to fume , Carbon Monoxide hazards etc, but how could you even possibly begin to get enough airflow to cool an Atlanta garage through that kitchen vent pipe?

Leave the kitchen vent alone. Marc

 

[gregtwojeeps]

Not only probably against codes due to fume , Carbon Monoxide hazards etc, but how could you even possibly begin to get enough airflow to cool an Atlanta garage through that kitchen vent pipe?

Leave the kitchen vent alone. Marc

It would not be a fun project anyway. If that exhaust hood's long horizontal vent with two 90 deg ells and a 45 deg. fitting has been used much and is over 5 years old, I bet it has a lot of grease laying in the bottom of it.

 

[rattle_snake]

For and intake vent, you could use a gable vent of whatever size. I have installed them for that purpose in both a steel garage door and the wall itself. If you want to block it off in the winter, just make a sliding cover like a dog door.
If you want it automated to open when fan comes on, its doable but more complicated and $$$.

There are also complete solutions;
http://www.qcsupply.com/aluminum-in...productfeeds&gclid=COebsOPX384CFQJvvAodUxgEEg