One of the most widely accepted theories is that the name comes from the Irish word , defined by Dinneen as a pigmy, a sprite, a leprechaun; for ; the latter word Dinneen defines as a pigmy, a leprechaun; 'a kind of aqueous sprite';ref dinneen this word has also been identified as meaning half-bodied, or small-bodied.
Exfiltration is the gradual leakage of fluid through any industrial equipment, a membrane or a wall because of small opening. Exfiltration occurs when a small opening allows fluid to drain from within an assembly. The gradual deposition of leaking fluid can cause corrosion in metal structures such as boilers, heat exchangers, storage tanks and other types of equipment and machinery. Exfiltration is also known as weep.
Air infiltration and exfiltration: In addition to intentional ventilation, air inevitably enters a building by the process of âair infiltrationâ. This is the uncontrolled flow of air into a space through adventitious or unintentional gaps and cracks in the building envelope.urpose provided (intentional) ventilation: Ventilation is the process by which âcleanâ air (normally outdoor air) is intentionally provided to a space and stale air is removed.