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House is from the 1930s. Still has gas boiler with original iron rads. The duct at top is the vent for the boiler and hot water tank. The middle hole is cemeted in and has a capped metal pipe in middle. The bottom is open and has some dirt in it and some loose bricks . Looks like it was roughly filled in at some point.
Any ideas what it would be? Old coal chute?
It’s not the fireplace ash cleanout as that’s beside it.