买房选楼层吉利最重要？内行人：真正不能入手的这4层才不建议，你买对了吗？

Core Viewpoint - The article emphasizes that when selecting a floor in a building, practical factors such as air quality, lighting, noise, and safety should be prioritized over superstitions or numerological beliefs about lucky numbers [1][12]. Group 1: Air Quality - Air quality varies significantly by floor level, with lower floors (especially 1st to 3rd) experiencing higher concentrations of pollutants from vehicles and industrial emissions [2][4]. - For households with members sensitive to air quality, lower floors should be approached with caution, while mid to high floors generally offer cleaner air [4]. Group 2: Lighting - Lighting is crucial for room brightness and heating costs, with lower floors often suffering from poor lighting due to obstructions from surrounding buildings or trees [4]. - The ideal lighting conditions are typically found between the 6th and 12th floors, where rooms are less likely to be blocked by lower structures [4]. Group 3: Noise - Noise levels are often higher on lower floors, especially if located near busy streets or commercial areas, which can disrupt sleep and daily life [5]. - Mid to upper floors tend to balance noise reduction while avoiding excessive wind noise that can occur at higher levels [5]. Group 4: Floors to Avoid - The 1st floor should generally be avoided due to issues like poor lighting, air circulation, and potential moisture problems, particularly in humid climates [5][8]. - The middle floors, often referred to as the "waist" of the building, can be noisy due to high elevator traffic and foot traffic [6]. - The top floor, while offering good views and light, can face issues like water leakage and extreme temperatures, making it less desirable [8]. - Floors near equipment levels should also be avoided due to noise and vibration from mechanical systems [8]. Group 5: Additional Considerations - Proximity to stairwells and elevator shafts can lead to noise disturbances, and the building's orientation can significantly affect light and ventilation [9]. - A comprehensive assessment of air quality, lighting, noise, and structural details is essential for making an informed decision about floor selection [12]. - Practical considerations should take precedence over numerological beliefs, ensuring that the chosen floor meets the family's specific needs [12].