Ensuring the efficient operation of the
ventilation system However, the thrust force depends not only on the difference in temperatures at the inlet and outlet of the ventilation system. Of great importance are the structural features of the ventilation duct:
- The first feature is the cross-sectional area of the ventilation duct. According to the regulations, a cross section of at least 160 cm2 is allowed. Moreover, one side of the channel should be 10 cm or more. If the calculation does not take into account the thickness of the pipe walls, then a pipe with a cross section of 14 x 14 cm will be required to ensure minimum thrust.
- The second feature - the height of the pipe, which is selected taking into account the value of the channel cross section. For example, for a section of 14x14 height should be equal to three meters or more, and for a section of 14x27 the length of the pipeline from two meters will suit.
Special attention should be given to the passage of the ventilation duct through the roofing structure. To ensure that the junction of the pipe to the roof meets all standards, it is better to use specialized roofing penetrations, which are now produced in a sufficient range. With their help, it is easy to mount a tight abutment of the coating and the channel with full sealing.
Before starting any construction work, it calculates and verifies compliance with construction standards. Designing ventilation systems is a complex and serious process, therefore a professional must be engaged in this.
In addition, one should think about forced ventilation, which also has an impact on the functioning of the entire ventilation system. Since if there is no organized flow of fresh air into the room, then any ventilation system will not work efficiently, and the thrust will be weak. Sometimes regular airing comes to the rescue, but it's impossible to say that this is an effective method. With the popularity of metal-plastic windows, there were problems with the influx of fresh air, so now very relevant supply fans are built into the wall or window structures.
Influence of the length of the ventilation duct
in some rooms does not adequately equip only one ventilation duct, so in such cases, parallel lines are installed. Therefore, the lengths of the channels and their correspondence play an important role. The unequal length of the pipeline can lead to a different thrust in them and, as a result, the direction of the air masses is reversed. To avoid this, it is necessary to make channels of the same length. If this is not possible, then the channel with the greatest thrust is equipped with a special device that regulates traction. You can also use a different pipe diameter. But these methods are used in extreme cases, if possible, we must adhere to equality of lengths.
How temperature affects the thrust of
The influence of temperatures at the ends of the pipeline can not be overemphasized. The greater the temperature difference, the better the traction. But it happens that at installation all is sustained according to the norms - and the lengths correspond and the cross section is correct, but the thrust is minimal. To fix this trouble it is necessary to warm the ventilation duct. Warming will help reduce heat loss and settle temperature differences.
Reducing the resistance of the ventilation duct
In their homes, ventilation is often made with their own hands made of bricks. In this case, the resistance of this device will be greater than that of ventilation of polymers or metal. Therefore, when laying bricks, you should clearly carry out the abutment of the brick pipe to the roof, otherwise any deviation can have a bad effect on the draft. The inner surface must be made perfectly even without protrusions, the joints should be filled with mortar, and the excess should be removed in order to avoid blockage.
The best way to reduce the resistance of the ventilation duct is to use finished stainless structures or polymer materials. Their surface is perfectly flat, and this is what is needed for good traction.
