At present, people pay more and more attention to the quality. When buying a house, many buyers shout as soon as they enter the sales office: I want the middle floor, the best 8-11 floors, which is not as expensive as the upper floor, nor as dirty and noisy as the lower floor. In fact, it's a mistake. Many high-rise buildings are the most "dirty" and noisy. The air in the high-rise building is not as fresh as expected, and harmful substances will inevitably accumulate above 30 meters. Layer 8-11 is the so-called dust lifting layer in environmental science. The dust and harmful substances in the air stay at this height. Now follow 360 common sense net to understand!
Wrong idea 1: 8-11 layers can be kept away from dust
Due to the influence of "Canyon effect" (Canyon effect refers to the surrounding public transport trunk roads or factories, as well as high-rise residential buildings), under the effect of street wind, the air flow containing dust does not move smoothly, but "hovers" in a certain section between high-rise buildings. The pollutants near the ground dissipate in a downward or horizontal direction after rising to a certain height with the air flow. The height is about 30 meters. That is between the 8th and 11th floors. At present, there is a "high density area of pollutants" in the middle of high-rise residential buildings in many residential areas. In a word, the dust between the 8th and 11th floors of these buildings will linger. In this process, the residents will "breathe and share the same fate" with the dust for a period of time before "kissing goodbye", and this is a noisy space.
Wrong idea 2: 8-11 layers can be far away from noise
Many buyers think that living in a high-rise building can "keep away from noise". Who would have thought that listening to vehicle noise on the first floor is better than listening to it on the 8th to 14th floors. This is because the path of sound waves is related to the number of trees and buildings. The sound is usually transmitted by the shortest route. Sometimes the high-rise can hear the noise on the trunk line. Originally, sometimes the sound will freely go up to the window of the high-rise. The sound wave propagates in three-dimensional way, and the sound wave received by the high-rise building is stronger than that of the low-rise building. However, due to the obstruction and absorption of the surrounding low buildings and trees, the noise of the low floors is relatively reduced, which can not be ignored in the choice of housing.
Wrong point 3: high price is good
When many buyers buy a house, they judge the quality of the floor of the house on the basis of the developer's quotation: a high priced floor is a good floor, such as the middle floor of a multi-storey building and the upper middle floor of a high-rise building (for example, the best floor of an 18 storey building is generally set at about 10 floors). Most people choose 8-11 floors. The price of floors 8-11 is set high, and the rich people often specify this floor. But the 8-11 floors are so-called "ash floors" in Environmental Science, and the house with this height is the dirtiest and noisiest floor.
Wrong point of view 4: finding problems in senior management and purchasing below three levels
Some buyers find that there is a high altitude fault, it is three floors below the house. Although the first floor to the third floor is very close to the ground, only psychological comfort can be obtained, but the air circulation in the lower floor is slow, the shadow and humidity are large, and the pollution is serious. For a long time by cars and asphalt road a large number of formaldehyde, carbon monoxide edification, harm is also great.
In fact, the real ideal residence is: no more than six floors, 200 meters away from the road, the best is a park, while the water. If it is a multi-storey building without elevator, as long as the lighting, sunshine, ventilation and other environment is good, usually three or four floors are relatively dry and convenient. If it is a small high-rise or high-rise residential building with elevator, it is not necessary to consider the problem of convenient transportation. Generally speaking, high is the best, mainly considering the wide vision, sufficient sunshine, good ventilation and less interference. There will be hidden dangers such as water leakage and heat insulation on the top floor, but if the roof is accessible, there will be more conveniences, which need to be considered comprehensively.