I saw this last week and have no idea what it’s for. Anyone ever see this or have any idea what its purpose is?
Pretty bad location for a vent. What’s inside in that location?
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There was a family room on the inside, nothing out of the ordinary, at least that I noticed.
Do you have a far away shot of that area?
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Is there a fireplace on that wall?
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That’s what I was wondering,
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Could be a first floor bath fan vent. Should have turned the bath fan on to verify.
The only way to vent a first floor bathroom is through the wall or ceiling joists.
No fireplace at that location.
There was no bathroom in that area.
My best guess is it was most likely used for something before the addition was built.
The vent duct can travel through the floor for awhile, it doesn’t have to be right there.
That probably answers your question? What could be vented?
- Stove
- Bathroom
- Plumbing
- Dryer
Then we have to make up air for the gas appliances to consider.
I just click them off until there is none.
Regardless, it is a crappy place, lol.
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The step flashing is compromised creating a potential leak.
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My WAG… Make-up air? Whatever it’s for it’s a terrible place for a vent.
What’s making my head hurt is the step flashing looks pretty good, as long as that top edge goes into a reglett.
Then, apparently the same age, is “that thing”.
Are you sure it’s an actual vent, just not a home inspector joke or decorative trim piece?
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I have no idea what it’s for, that’s why I posted it here. 
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It’s a kick-in flashing. 
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Yeah, rain hits the deck and kicks right in the louvres.
If there isn’t any water damage on the opposing side of the wall and it’s been there a while, not much to worry about I figure.
So lets analyze this a little though. If this room is an addition, that means the original cavity that used to terminate at the ground, now terminates at the slope of that room. That means there’s no venting for the brick sections above the slope. Maybe it’s both a vent and a drain?
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