Metal roof top protrusions??

[Mike Lamb]

I saw these on a 2009 building and do not know what they are.

[Bill Kibbel]

I've never seen that type.  I would guess they're extraction fan terminations (bath fans).   What's the pipe diameter? What did they smell like?

[Mike Lamb]

Bathrooms and kitchens were on the other side of the building so not likely. I could see no lint if they were for dryer vents. No smell. There was a sister building and that had the same thing near the AC units.

[BADAIR]

wag: solar tube skylight

what was below

[Mike Lamb]

8 hours ago, BADAIR said:

wag: solar tube skylight

what was below

 

I have never seen light tube without a lens on top. I did not have access to the unit below.

[BADAIR]

5 hours ago, Mike Lamb said:

I have never seen light tube without a lens on top.

thought the top might be a smoked colored lens

like skylights i've seen

let us know if/when you find out 

Edited April 18, 2021 by BADAIR

[BADAIR]

happened to be slumming the other day & saw this

appeared similar shape

does size matter?

https://www.lowes.com/pd/Rinnai-Tankless-Gas-Plastic-Water-Heater-Vent-Kit/1000234039?cm_mmc=shp-_-c-_-prd-_-plb-_-google-_-pla-_-209-_-soswaterheatersparts-_-1000234039-_-0&placeholder=null&ds_rl=1286981&gclid=Cj0KCQjwiqWHBhD2ARIsAPCDzam9Oa-psDNtY36b_8PM-o0rqSrB6_vnRguhCSaSSXnIsUBnqL6bqUsaAj94EALw_wcB&gclsrc=aw.ds

Edited July 10, 2021 by BADAIR

[Mike Lamb]

Right on, Bad Air. I looked back and the prop. had tankless. Thanks.

 

[SmittN]

Looks unfamiliar and a little weird. Maybe it’s somehow connected to the vent system? Or it’s an unusual part of an eavestrough? It might be intended somehow for collecting water. Or a usual way to install skylights. For example, if you don’t have access to the roof but want some natural light in your apartment from above.
It seems to me that I have even seen something like this on the Internet. It was like a system of lenses that allowed you to transport the light inside through a tube.

Edited April 18, 2022 by SmittN