system age ?

Big Will

The current building management knows nothing about the system. I am curious if any of you east coast guys who see so much more of this can estimate age of the system.

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Steamhead

Looks like a mix of stuff. The Honeywell remote-bulb control in that one pic is probably 1940s or earlier.

DanHolohan

I’m with Steamhead.

Danny Scully

Looks like a downfeed system with the vents on the roof right @Steamhead and @Dan Holohan ?

DanHolohan

And a hot-water zone.

Steamhead

Unusual to see vents on the roof like that. If that were in Baltimore or north of here, I'd say they were originally put there to heat a roof-mounted water tank so it wouldn't freeze. But San Francisco apparently doesn't get that cold...............

The one vent is a Trane. Not sure when they stopped making that model, but I've seen 1930s Trane systems where the original Trane vents were different.