air leakage


Also found in: Acronyms.

air leakage

[′er ‚lēk·əj]
(mechanical engineering)
In ductwork, air which escapes from a joint, coupling, and such.
The undesired leakage or uncontrolled passage of air from a ventilation system.

air leakage

1. The volume of air which flows through a closed window or door in a given length of time as a result of the difference in air pressure on its opposite faces.
2. In ductwork, air which escapes from a joint, coupling, etc.
3. The undesired leakage or uncontrolled passage of air from a ventilation system.
4. The flow of uncontrolled air through cracks or openings in an enclosure within a building (such as a HVAC plenum) or through the surfaces which enclose the building.
References in periodicals archive ?
To ensure continuity, each assembly serving its role in resisting infiltration, such as a wall, window, foundation, roof, or skylight, must be interconnected to prevent air leakage at the joints between materials, components, assemblies and systems.
Examples of typical air leakage locations are shown in Figures 2 through 6 .
"We toured the house feeling where the heat was being lost using a `blower door' test that measures air leakage and shows where leaks occur," says Buchman.
Since EnergyPlus is a widely used and validated simulation tool, but currently without the feature to account for moisture sources due to air leakage, this paper focuses on an extension of the existing heat-air-moisture transfer model (HAMT) to account for such.
It is possible to calculate an aggregate compressed air leakage rate from measuring the time and pressure during the compressed air system discharging and charging processes.
Both laboratory measurements and field surveys have confirmed the existence of air leakage from parallel FPTUs to the plenum space through the backdraft damper in the cooling mode.
When postoperative complications were considered, 12 children experienced long-lasting air leakage that responded to drainage.
Wall Guardian FW-100A, a liquid-applied, fibered acrylic air barrier that likewise functions as water/ weather barrier and vapor retarder, exhibits an air leakage rate of 0.0004 cfm/ft.2 @ 1.57 psf--well below the ASTM E2357, Standard Test Method for Determining Air Leakage of Air Barrier Assemblies threshold.
Wall Guardian FW-100A exceeds ASTM E2357 (Standard Test Method for Determining Air Leakage of Air Barrier Assemblies) with an air leakage rate of just 0.0004 cfm/ft2 @ 1.57 psf--100 times better than the test requirement.
Together, both elements ensure that product degradation is minimal as the product travels through the valve and energy costs are reduced by cutting air leakage by up to a third.