air infiltration的意思|示意

Air infiltration refers to the infiltration of air into buildings through cracks and openings in wall, ceiling, and floor surfaces. It can also occur through ventilation systems, windows, and doors. Air leakage is a major contributor to energy waste in the building envelope.

Air infiltration can be caused by wind acting on the building envelope, convective air flow through cracks, and pressure differences between the indoors and outdoors. The amount of air infiltration depends on the temperature difference between the indoor and outdoor environment, the area of the opening, the quality of the seal around the opening, and the direction and speed of the wind.

Air infiltration can cause problems like drafts, uncomfortable temperatures, and high energy costs. It can also lead to moisture buildup, mold growth, and other health risks. To prevent these issues, buildings should be properly sealed and insulated.

Air infiltration can be reduced by using weatherstripping, caulking, and other sealants. Writing on windows and doors, or using the appropriate materials, can also improve the seal. Additionally, using mechanical or natural ventilation systems will create an air barrier, which prevents air from entering the building.

Air infiltration can have a major impact on the energy efficiency of a building. For example, in a tight building envelope, air infiltration could reduce the efficiency of heating and cooling systems by as much as 30%. In addition, air infiltration can increase energy costs, reduce indoor air quality, and contribute to moisture problems.

In conclusion, air infiltration can contribute to energy waste and moisture buildup in buildings. It can be reduced or eliminated by using proper insulation, weatherstripping, caulking, and other sealants around windows and doors. Additionally, using ventilation systems and other air barriers can help to keep air from entering the building. Making these improvements will not only improve the energy efficiency of a building, but it will also help to keep occupants healthy and comfortable.