tracer gas technique, single
[AIVC, Air infiltration and ventilation glossary, 1992]:a method for determining the air change rate within a room or zone using only one tracer gas.
Continue reading →main-glossary
transfer index method
[AIVC, Air infiltration and ventilation glossary, 1992]:a method of measuring ventilation rates, by determining the transfer index between two points. The time integral of tracer gas concentrations is determined at one point, following the liberation of a fixed volume of … Continue reading →
transfer ratio (Rs)
[EN 13141-7:2021, 3.3]:mass transfer of the discharged air to a zone that is actually recirculated air from the same zone, due to internal leakage and external casing leakageNote 1 to entry: If the transfer ratio is determined with the induct … Continue reading →
transferred air
(See air, transferred)
Continue reading →transformation (fitting)
[EN 12792:2003, 375]:affects a change of area and/or the form of the cross-section. If the transformation is continuous then a reduction in the area is termed convergent and an increase in area is termed divergent. If the transformation is abrupt … Continue reading →