If it sits on an inside wall venting through the attic and out is a better option but if it is on an outside wall it is more practical to vent through the wall.
Vent range hood through attic.
It is definitely not a good idea to vent a range hood into the attic.
For other types of siding the installation steps are very similar.
Vent away cooking odors and filter out heat smoke grease and moisture.
There are actually a lot of interesting questions there vern.
Vent your bath and kitchen exhaust fans through the roof through a special roof hood.
The procedure is similar to the installation of the kitchen hood vent through the roof but it is slightly different though.
Ducted or vented range hoods send air outside through a duct.
Ideally the range hood should be vented to the outside usually through the roof.
First remember that there is a lot of grease and moisture in that exhaust just think of how dirty that filter gets.
Installing a range hood vent through an outside wall.
So if you vent.
Many times your choice depends on where your range is located.
In either case do not vent into the wall or the attic.
Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot.