What is this?

[akdov]

Hello!

Anyone know what this is? Something for the chimney? Ventilation? Something else?

 

[bax]

An extender for the chimney pipe, I guess.
It's supposed to be inserted into something anyway.

 

[akdov]

Yes, exactly... I've been looking into something similar...

I've also been suggested that it could be some type of fitting for a kitchen fan as well...

I only have this part and don't know either the brand or the purpose, so it's still a pretty useless thing...

 

[Carla]

I guess it is a roof penetration that is inserted into square asbestos channels that were used for ventilation pipes earlier.

 

[bax]

Yes, it wasn't a bad idea.

 

[hantverkare1]

I guess it is a roof penetration that fits into square asbestos ducts that were used for ventilation pipes earlier.

That's correct.
Tore down an identical one on Monday.