More in Kitchen
Remove the face of the cabinet where the exhaust vent hole needs to go.
Outside the house, expose the framing in the wall. Remove the siding, house wrap and sheathing from the exterior of the house in the area of the vent hole. Pull back the insulation and remove any bracing that may be in the way. Always wear gloves when handling insulation.
From inside, run a keyhole saw through to mark the location of the hole.
Toenail in the blocking (Image 1) so it is in the correct position to hold the vent hood hangers.
Using the vent elbow as a template (Image 2), mark the hole placement outside.
Cut a hole through the studs with a reciprocating saw.
Finish the hole in the interior drywall and dry fit the elbow.