We moved into a new (to us) house, and neither we nor the inspector can figure out where the range hood vents! The stove and hood are against an exterior (brick) wall. There is a cabinet above the hood, so it does not vent directly up. We thought that meant it probably recycles the air, but our inspector could not find anywhere where air is getting blown back into the kitchen -- it is only getting sucked up. Looking up into the hood, the blower is attached to the wall, and there may or may not be a hole there behind the blower. Since no air is coming back into the kitchen, we assume air is getting sucked horizontally into the wall. But on the exterior of the house, there is NO hole or vent directly where the range is. There is a possible vent about 15 feet to the side, but nothing appears to come out of it (we used a fogger to try to track the path) -- and it would require the air vent immediately turn 90 degrees after going into the wall, and then turn 90 degrees again to go back out. Is it possible it vents up to the roof three stories up, after going horizonally into the wall? (It would be very challenging to get up to the roof to look.) Is it possible the people who renovated the kitchen just vented it into the wall without any escape? Is there a reasonably easy way to figure this out without destroying anything?
If it helps, it is a 140 year old brick house, and the kitchen was renovated about 6 years ago (2 owners ago). I looked up the brand/model of hood and it says it can be set to recirculate or vent outside, either horizonally or vertically.
Thanks so much for your help! We are inexperienced and would really appreciate your insights!