Air Tightness Measures And Detection Methods Of Passive Ultra-Low Energy Building

The concept of Passive House was first proposed by Professor Adamssen of Lund University in Sweden and Dr.Fiest of Germany in 1988,which can achieve energy efficiency,sustainability,comfort,economy and good air quality in one.It has been promoted by various countries around the world.Since entering China in 2009,it has developed very rapidly.Air tightness is one of the core elements of passive ultra-low energy buildings,directly affecting and determining the overall energy saving effect of the building.Improving air tightness of the building has the following significant effects: 1.Reducing energy consumption.The high airtight structure exchanges less with the outside airflow,effectively reducing the cold heat lost in the construction gap.2.Reducing the condensation phenomenon.By special treatment of the doors and windows,the energy exchange is very low between the internal and external,but the drainage and gas barrier performance is strengthened,which basically eliminates the phenomenon of condensation and mildew;3.Improves living comfort.By adopting the high airtight structure of doors and windows can isolate external dust,noise,smell,etc.,to create a good living experience.This topic will study and compare air tightness specifications between China and Germany,to analyze their focus and testing methods.Through the completed project-Passive House Technology Center,study all-round airtight measures of the surrounding structures,temporary sealing measures when detecting,and the methods of detection.All studies above are to refine and improve airtight measures and testing methods of passive ultra-low-energy buildings,also can be used as benchmarks and templates.The content of this study can also be a basis for national or provincial specifications of airtight measures and testing methods.