An old fashioned oil boiler in the kitchen was removed years ago, this left a block of concrete chimney from the ceiling into which the flu pipe went. It is approx. 39" high and 13" width and depth. One side is effectively on an exterior wall, but there is a utility room added to the other side of that wall. We are looking to have the concrete chimney removed and the walls and ceiling it is attached to plastered and made good.