What to do when the Chimney is Cold.
When lighting a fire where the chimney has not been used for some time, start the current of air upward by burning a paper in the stove pipe, or by holding it in the chimney, if it be a grate fire.
If the heat has been turned off from a room for some time it occasionally happens that the heated air will not come through the pipe when it is turned on again. In that case close for a few minutes nearly all the registers which serve as outlets for the other pipes, and the heat will be forced into the cold pipe. After this it will go that way naturally.