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Condensation on range hood and air coming out behind cabinets.

735 Views 7 Replies 3 Participants Last post by  Chris616
We just finished our new home and noticed that our range hood (stainless) is condensing on its surface when running. Additionally in the gap between the drywall and corner cabinet, on the same wall as the range, air is leaking out and it gets worse when the range is running. It seems as the range may not be working and the vent itself isn't sealed properly? Thoughts?
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Sorry. I was in the mobile version of the site and apparently you can't add anything to a post.

Here's a photo. The air escaping (I held a piece of paper over and the paper is being pushed down away from the gap) seems to be coming OUT into the kitchen. It also makes sense why my humidity is reading 63-66% since we moved in and hasn't changed (we're running a Geothermal system with R-49/raised heel trusses, ICF basement, and Nuwool in the walls).

The corner is on the right side of this photo.
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Some photos would help us to be able to help you.

Is this a range hood that exhausts outside (roof/wall?) or just recirculates air into the room after going through a filter? If the former, have you put your hand over the exhaust outside to confirm that air is moving?

For the “condensing” issue, are you saying that when you’ve got a boiling pot of water on the stovetop/cooktop that some of the steam is condensing on the fan hood? That’s not unusual. Or are you saying that this condensation is happening just when the fan is operating, regardless of whether steam is being produced below it?

Assuming that the fan exhausts outside, if you seal the duct termination on the exterior of the house temporarily, does the airflow that you’ve described behind the corner cabinet stop?

It vents outside on the same wall the stove/range is on (exterior).

The condensation only happens when cooking, but nevr seemed to have that problem on older ranges in homes past.

As for sealing it off, I haven't tried it, but could try that.
Is the airflow exiting from under the back of the cabinet as I’ve shown with the arrow?

Please answer the five questions posed in my earlier message.

Yes, that is correct.
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