How to increase draft in a furnace
In order for the heating device to have high performance, it is necessary to carefully monitor the draft that is located in the chimney. A lot can depend on it, including the safety of the building’s residents.
The content of the article
Why is there bad draft in the furnace?
Poor or weak traction most often causes reverse traction as a consequence. The reasons may be completely different from each other. As for the main one, these are the mistakes that people made when designing the heating system. In this case, there is a possibility of improper use of building materials. Let us also consider in more detail the possible sources of the problem and what to do in such cases:
- The defect may be hidden in the chimney design. The proportions between height and firebox are sometimes calculated incorrectly. And because of a low pipe, for example, the pulling often happens worse. However, if the parameter for this component was greater, then reverse thrust would not have formed.
REFERENCE. That’s why it’s so important to consider the universal size – about five meters.
- Don't forget about the diameter ratio. A narrow value makes it difficult to remove combustion products.
- In addition, if the product is square in shape, then most likely the movement of smoke will not be as free as it would be with rounded corners.
- Natural conditions also significantly influence the presence of weak traction.In rainy climates, high humidity or strong winds, the level tends to decrease.
- If there are various damages or scratches or irregularities on the pipe, then there is a high probability of obstacles to attraction with a good coefficient.
- Stove care. There are often cases when the user forgets about cleaning, thereby accumulating dirt - collapsed building materials.
- The reason is very similar to the previous one. Only this time the clog is soot.
- The ventilation process has been disrupted. Because of this, there is a shortage or no supply of air mass at all.
How to check chimney draft
After noticing that craving has worsened, you should not immediately neglect serious action, you should think about how to increase it. Before you begin to fix the problem, you need to make sure that it exists. Therefore, let’s start with the folk, traditional method:
- You can take a piece of any paper material (it can be either a separate sheet of paper or toilet paper).
- Light this section (if the density is high) and let it burn to the end. Thus, it will respond perfectly to the direction of the air.
- Next, you should present it to the stove and observe: when the piece moves towards the pipe, positive draft is noted. And on the contrary, it reacts to the flow from the side of the room or is completely in its original place, which means that the opposite is present.
In addition to the described check, there are others. Let's look at them too:
- An experiment using cigarette smoke, a lighter, or a burning match is considered visual. You just need to bring one of the named objects to the device. And follow the same recommendations.If the device points towards the flame, the draft is excellent. In the opposite direction - weak.
REFERENCE! In extreme cases, it is possible to use a candle, the light of which will act as a pointer.
- You can look inside the stove, into the firebox. And analyze the shade of the flame. Golden yellow color indicates positive draft and uniform combustion, while black smoke indicates a bad situation.
IMPORTANT! If a white light appears in your design, then this indicates the presence of excessive attraction.
- As for modern and scientific methods, this is the use of appropriate equipment - an anemometer. It is used by specialists to obtain information about measuring chimney draft. It is accessible to any desired user.
How to improve oven draft
If you have checked the presence of reverse draft and found out the reason, the next step is to begin troubleshooting the problem. How to increase draft in a furnace? Naturally, the measures taken will be as diverse as the sources of defects.
- If the smoke passage is clogged, it will certainly need to be cleaned. All released substances that have accumulated over time must be eliminated. Carbon deposits can eliminate burning of aspen logs. They do a great job of reaching the maximum temperature, which is what this method needs. To carry out preventive maintenance and improve the condition of the pipes, it is advisable to add rock salt at the moment the firebox is burning. In addition to folk remedies, there are also chemical ones that are specifically designed for this.
- Dismantling will be required if the device is not constructed correctly.
- Avoid drafts.
- Installation of additional devices.
Everything is written in general and approximately, but here again from a real-life example:
A friend turned to me and asked why the new fireplace had bad draft. (I’ll say without boasting: I have 30 years of experience as a builder) During the examination, I concluded that the fireplace was laid out well and there was a “tooth” and the pipe was smooth, well worn, there was nothing to complain about. There is one secret left for all fireplaces and fireplace stoves and I am revealing it to you all: The cross-section of the chimney in relation to the fireplace portal should be: (1 to 11) remember this rule of nature and do not listen to fairy tales about corners and turns, etc. no dampers or grates are needed.