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The dust layer generally exists about 300 meters of the building, and the 8th floor is normally not a dust layer.
Whether a house is susceptible to dust depends mainly on the location of the residential building. Relatively speaking, if it is on the road surface in a prosperous area, the dust layer is relatively low, and if it is a house in the suburbs, the dust layer is relatively high, these are not absolute.
In addition, it should be noted that the secondary water supply of most multi-high-rise buildings is calculated from the 8th floor, that is, if the building has a power outage, it will affect the work of the water pump above the 8th floor, resulting in a power outage + water outage. In addition, when buying a house, you should also pay attention to factors such as whether the transportation is convenient and whether the heating is ideal, and the dust layer is really not the key to buying a house.
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It depends on how many layers are in total height, the total height is 6 floors, 3 floors and 4 floors are the best, and 2o multi-storey ones should be high. Layers 8-11 are dust layers (of course, not absolutely, there are differences between the north and the south). The encyclopedia has an introduction to the suspended layer of pollutants.
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What you call the dust layer is also the layer of dust in technical terms. Generally, it is 9 to 11 floors. In addition, this is a house with a typical floor height of 3 meters.
In other words, the ash layer is about 27 to 33 meters (depending on the air pressure, temperature, etc.). If the current community is close to the road, there are generally shops below, so the commercial height is relatively high, so you should pay attention to this when buying.
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The north and south are different, as well as lighting, noise prevention and other issues, take it into account.
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The 8th floor is better.
From the view of the floor where the house was purchased, the view on the 6th floor was average, the light was insufficient, and the ventilation was also affected. The 7th and 8th floors, these two floors do not make people feel afraid of heights, the environment is quiet, the view is wide, relatively ideal; The 9th floor is a low-to-medium floor, and some of the conditions are good, such as lighting and ventilation, travel, and water pressure, but it also depends on the overall situation of the community. Therefore, in many aspects, the 7th and 8th floors are better.
And in our country, the number 8 is a very pleasing number, 8 has the meaning of hair, as long as it is related to the number 8, it must be not bad, so people will give priority to 8 when choosing various numbers.
Precautions for buying a house.
1. Pay attention to the needs of your family.
A person's ability is limited, now to buy a house, most of them are purchased as a family unit, buying a house is not a person's business, a family's business, so when choosing a house floor, you should also refer to the opinions of your family. In the family, some people like high floors and think that they can stand high and see far; Some people feel that the floor is too high, and when they look down from home, they will feel dizzy and a little afraid of heights. If there are elderly people and children in the family, it is not advisable to choose a floor that is too high.
2. Consider safety issues.
There are many problems with the safety of living in a city, and even if you live at home, there is a possibility of accidents, and the development and scale of the city will increase the number of disasters that will follow. People who live in high-rise buildings should always be aware of disaster prevention. If you choose to live in a high-rise building, you should consider how to ensure your safety in the event of a disaster.
Such as fire, **. In this awareness, floors that are too high should also be considered carefully.
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8-11 floors. But it also depends.
The 1st to 3rd floors of the floor are usually planted with trees, so you can feel the smell of nature in the lower floors, and the 8th to 11th floors are the dustiest because some people have studied that the dust stays in this location. The air on the higher floors is slightly better, and you can see a lot of scenery from the high grounds, but it is not easy to evacuate in case of danger.
Differences between the north and south of the building: And the dust distribution of the building day and night is also different. Usually the dust floats lower at night, but on a clear day, it may float a little higher into the sky.
In addition, because the activities of people and vehicles are affected by the activities of people and vehicles, there will be more dust in the higher layer, and when there is fog in autumn and winter, the dust is more likely to adhere to the water vapor.
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However, for high-rise buildings, if you don't want to have too much dust, it is better to buy higher, because the lower floor houses are more likely to be exposed to dust. If the dust wasn't a sandstorm, it wasn't blowing from the sky, it could have been blown up from the ground. Therefore, those residents who live on the ground floor are more likely to be exposed to dust, and dust also has its own weight, even under the action of the wind, it will not float too high, so generally houses below 9 floors are indeed dusty.
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The lower floors are dusty, and the higher the floors above the ground, the cleaner the air. Gaseous pollutants such as sulphur dioxide, nitrogen oxides, carbon monoxide, and particulate pollutants such as PM10, as well known as PM10, decrease with floor height. If the residence is close to shopping malls, downtown areas, roadside barbecues, restaurants, etc., relatively speaking, the air quality is relatively good if you live on the upper floors.
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Generally, it is 9 to 11 floors, because the place where the dust stays is generally 25 to 30 meters away, and this place will form a floating zone of dust.
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Generally, the dust on the first layer is relatively large. If there's a storm outside, the first floor to be injured is the first floor. And there will be noise from the doors and windows.
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Generally, the wind and sand from the 20th floor to the 26th floor are relatively large, which is due to the relatively high floors, so the dust from the high places will enter the home.
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Generally speaking, buildings with about 10 floors are relatively dusty. This place will form a floating zone, and a lot of particulate matter will appear.
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Generally, the dust of the 8th to 12th layers is the largest, because there is a layer of ash in the environment, and the airflow of the dust is not very stable, it will hover up and down, the density of pollutants is the highest, the dust of these layers is the largest, be sure to decorate the windows, do not leave gaps, and at the same time you can also place an air humidifier at home.
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Normally, the 9 and 11 layers are the most dusty, but the specific needs to be determined according to different terrain and environmental factors, and it is not absolute.
The reason is that the dust will form a "dust floating zone" at a distance of 25-33 meters from the ground, but the height of the dust is related to many factors, such as wind speed, altitude, particle size, etc.
According to the previous investigation, the concentration and PM10 concentration were measured, and the results showed that whether it was PM10, the lower the floor, the higher the concentration, especially on PM10, the concentration was only 60 micrograms on the 29th floor, and 108 micrograms on the 3rd floor.
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Now the city is full of high-rise buildings, the height of the residential area is basically more than 18 floors, there is a saying on the Internet, that the 9 11 floors belong to the ash layer, there is a lot of dust, it is best not to buy. It's terrible that some people actually believe this kind of rumor, and it spreads more and more widely, and more and more people believe it to be true. This argument simply does not stand up to the test of knowledge of physics.
Their so-called ash layer, that is, about 30 meters from the ground, that is, 9 11 layers, but according to physics, from the ground to more than ten kilometers up belongs to the stratosphere, the vertical movement of the air in the stratosphere, and the horizontal back and forth movement are non-stop, there is nothing special in the air at an altitude of about 30 meters, there is no preference for dust at a height of 30 meters, in other words, there is no so-called ash layer at all.
Most of this statement comes from the flickering of the sales staff of the sales department of the real estate company, they actually have a small ninety-nine, they want to leave the 8 and 12 floors of the central floor that is not high or low to their own people, so they claim that these floors are not good, and they are forced to make a statement that the ash layer is raised, and the intentions of these people are really vicious. In addition, Chinese consumers are stupid and don't like to think, and everyone is the same, which leads to the saying that 8 12 layers of ash are spreading more and more widely, and many people are changing their color when they hear it. In fact, most of the high-rise floors are generally within 18 floors, and the 8 and 12 floors are just not high or low, which belongs to the middle floor, and the price is also the most expensive.
The housing below the 8th floor is too low, the sunlight is very bad, the noise downstairs can be heard clearly, the meaning of buying a high-rise is lost, if the 12th floor goes up, the cost of using the stairs is very high, the most afraid of power outages, once the power outage, the elderly and children are unbearable. Therefore, 8 and 12 floors are precisely the first floors, which are the first choices that consumers should choose. Don't listen to the wind or the rain, learn to think and judge is the most important thing.
China's territory is so large, and the altitude, climate, and temperature of each place are different, which are the key factors affecting the dust stay, and the height of the dust stay is definitely different, and naturally it will not be all in the 8 12th floor. I also did some field research, and the residents who lived on the 8th and 12th floors did not report that their floors were particularly dusty, but that according to the knowledge of physics, the higher the floor, the cleaner the air and the less dust, that's for sure. Believing in science is what we should be striving for.
If there is a six-story house around the high-rise, it is true that you cannot buy 7 or 10 floors, because the roof of the six-story building is a pollution exhaust floor, which has to be analyzed on a case-by-case basis.
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I don't think there's any basis, I think it's good from the eighth floor to the 12th floor, I can climb the stairs even if there is a power outage, and this floor is very safe, and I can escape quickly if it happens, and it won't be very noisy.
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There is no basis for this statement, because my family lives on the 10th floor, and I didn't find the problem of "too much dust", if there is too much dust, it is just not cleaned.
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The dust layer is also known as the dust layer. Generally 9 to 11 floors. And this is a house with a height of 3 meters. In other words, the dust layer is about 27 to 33 meters (depending on the air pressure, temperature, etc.).
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