thermal transmittance (“U”-Value)

[AIVC, Air infiltration and ventilation glossary, 1992]:the heat flow transmitted through a unit area of a given structure, divided by the difference between the effective ambient temperature on either side of the structure, under steady state conditions. Expressed as a Continue reading →

thermography

[AIVC, Air infiltration and ventilation glossary, 1992]:the process of converting the heat emitted from an object into visible pictures. It is used to indicate the temperature distribution over part of a building envelope and is useful for locating infiltration flow Continue reading →