BET is a non destructive test that determines:
1) How air tight your building envelope is, and
2) If it is leaking, how much and where?
We perform BET per the testing requirements of your project. These will be detailed in the project specifications, which may refer to ASTM E 779 or ASTM E 1827. Leak detection is performed per ASTM E 1186.
Once contracted, Reynolds Engineering plans the testing per project specifications or owner request. There is a lot of coordination of trades to make this test happen & having a clear and defined path helps the date of testing go smoothly.
During the testing (when required by the specification) thermographic imaging is taken of all envelope surfaces. These images can provide a lot of information that our normal vision can't see.
We use localized smoke to watch air current inside rooms, especially around problem areas. Being able to see those currents helps us to find the issue more often than not.