Method and apparatus for monitoring building air flow

摘要

According to an embodiment of the invention, there is provided a method and apparatus for monitoring the air quality, whereby removable filter cartridges or modules containing a monitoring filter can be safely removed and inspected to determine whether or not unsafe pollutants have been introduced to the air within a confined structure such as a building. Another embodiment relates to a valve member for self-actuating when the module is removed to examine the monitoring filter.