Perfluorocarbon Tracer Gas Technique

Perfluorocarbon Tracer Gas Technique
(PFT)
  An air infiltration measurement technique developed by the Brookhaven National Laboratory to measure changes over time (one week to five months) when determining a building's air infiltration rate. This test cannot locate exact points of infiltration, but it does reveal long-term infiltration problems.

Energy terms . 2014.

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