The owners of the houses with stove heating know how difficult it is to melt the cooled furnace (fireplace or heater), especially in rainy windy weather. Will pay in the truest sense because the smoke at first is often not the pipe, but rather into the room. This problem is especially relevant for those owners of garden and country houses, which are frequented there in the cold season only as needed.
Out in the presence of electricity with the help of vacuum cleaner and cut the curved steel pipe of suitable length and diameter, which must be installed inside the trunk of the chimney with the release of its lower end through the wall, as shown in the figure. When emptying a vacuum cleaner at the top of the pipe of the air flow outside, will create a vacuum and thereby increase traction.
But if the electricity is not fed or house cleaner is not stored, it is better to resolve this issue once and for all.
Will help in such a situation, simple design, called the cap, which contributes to traction even in cases where the pipe provides a suction of smoke due to insufficient section of the chimney, the low elevation of the pipe, the excessive number of channels in the rotary kiln, connecting to the pipe multiple heating devices, etc.