what is this assembly?

[Peter Louis]

This is 1996 townhouse with underground parking. I do not know what is this on the siding.

A damper or a security assembly?

Thank you

[Jerry Peck]

That is a photo cell, most likely for turning security lights on and off.

[Peter Louis]

the same building, visible drain tile is cast iron which goes to underground parking. any advantages of cast iron? never seen this before.

[Jerry Peck]

Only thing that comes to mind with that being cast iron is that the gutters are draining into the building sewer piping as it exits from under the building - if that is the case that is not allowed.

[Peter Louis]

1996 TH, I do not think it has combined drain. probably for fire stop consideration