Availability of draft is one of the main functional features defining overall performance of the furnace or fireplace. The weak draft in flue becomes the cause of difficulties at firing up and formation of reverse thrust at which there is smoke of all room. It is possible to enhance draft by means of the special devices installed on head of smoke pipe.
Instruction
1. Enhance draft and increase efficiency of the offtake, having used the chimney deflector which is the aerodynamic device which principle of work is based on deviation of air streams and strengthening of conclusion of the main stream from flue. At side wind the streams reflected from roof promote strengthening of draft and suction of smoke from flue. Choose one of popular designs of the deflector: multilevel, H-shaped, round, deflector star or Grigorovich's deflector. Stainless steel of which they are made is resistant to acids and high temperature of combustion gases.
2. Install the rotational turbine which enhances draft in pipe due to use of wind energy. Rotating in one direction irrespective of in what party the wind blows, she creates discharge over the smoke channel. The design of the turbine protects the smoke channel from hit in it of birds, precipitation, garbage and leaves. Lack of this device is the impossibility of work during calm and creation of the increased draft in windy weather. Besides, you will need to watch that temperature of combustion gases did not exceed the recommended norms (150-250 degrees C).
3. Get the chimney weather vane (vane) providing free exit of gases alee and enhancing draft in the smoke channel. Turning thanks to the original design against the direction of wind, the weather vane covers the mouth of flue from air streams. At the same time the air flows which are flowing round it suck smoke from flue, enhancing thereby draft. The weather vane design made of anticorrosive heat-resistant steel well transfers adverse operating conditions and protects the smoke channel from hit in it of rain and snow. Minus of chimney weather vanes their unstable work at strong wind is considered, need of periodic greasing and continuous diagnostics regarding freezing and contamination.