The act of wind blowing into the house through poorly weather-stripped windows and doors.
The leakage of air into a building through cracks and openings. The house air pushed out is sometimes known as "exfiltration".
The process by which air leaks into a building. In either case, heat loss results. To find the infiltration heating load factor (HLF), the formula to account for the extra BTU's needed to heat the infiltrated air is
The air entering a space through a wall, crack, doors, and other openings.
The leaking of outside air into a building through cracks and holes, caused by the pressure differential between the indoor and outdoor air. inorganic Not organic, a compound that is not derived from an animal or plant, derived from a mineral.
The amount of air leaking in and out of a building through cracks in walls, windows, and doors. Insulating glass (IG)
The passage of outside air into building through doors, cracks around windows, etc.
Leakage of outdoor air into a house, such as through cracks around sash or window frame.
The controlled or uncontrolled leakage of air into a conditioned space.
The inflow of outdoor air into the indoors, which is accompanied by an equal outflow of air from indoors to the outdoors.
The undesirable flow of air into a building through cracks and around doors, windows and other openings in the building envelope. Infiltration is generally accompanied by exfiltration, the flow of air out of the building.
Amount of air leakage into a building.
ANY MOVEMENT OF AIR INTO A BUILDING USING CRACKS AROUND WINDOWS AND DOORS. ALSO AIR MOVEMENT INTO A BUILDING WITHIN WALLS, ROOFS AND DOORS.
The entry of air from an adjoining room or from outdoors through wall and ceiling openings due to a difference in air pressure between the two areas.
Air flow into a space usually through walls and leaks around doors and windows.
Uncontrolled leakage of air into a building through cracks around doors, windows, electrical outlets and at structural joints.
Outside air that enters a structure through openings or cracks in the construction materials, especially windows and doors. "Design" infiltration in residences can range from one-half air change to three air changes per hour, depending on how well the houses are constructed, caulked, or weather-stripped. Average air changes over the heating season are lower. Infiltration is a major area of home heat loss.
The movement of air into a building structure. Along with exfiltration of hot interior air, infiltration of cold exterior air can be the principal heat loss mechanism in a structure.
the uncontrolled movement of outdoor air into the interior of a building through cracks and gaps. The gaps are usually found around walls, joints, windows, doors, roofs etc.
Air leakage inward through cracks and interstices, and through ceilings, floors and walls of a space or building.
The uncontrolled inward leakage of air through cracks and gaps in the building envelope, especially around windows, doors and duct systems.
The leaking of fluid or medicines into tissues, which can cause swelling.
Unintentional movement of outdoor air into a house. It results from the forces of wind, temperature difference, and HVAC operation.
The uncontrolled inward air leakage through cracks and interstices in any building element and around windows and doors of a building caused by the pressure effects of wind or the effect of differences in the indoor and outdoor air density or both.
Air from the environment that penetrates a building.
The uncontrolled inward air leakage though cracks and spaces and around windows and doors in any building.
Air leakage which can escape through cracks between the glass assembly and the window frame resulting in heat loss.
The inadvertent flow of air into a building through breaks in the exterior surfaces of the building. It can occur through joints and cracks around window and skylight frames, sash, and glazings.
The movement of outdoor air into the interior of a building through cracks around windows and doors or in walls, roofs and floors.
Air flow inward into a space through walls, leaks around doors and windows or through the building materials used in the structure.
In the winter, warm air leaks out and cool air leaks in. This process reverses itself in the summer.
See air leakage.
The passage of air from indoors to outdoors and vice versa; term is usually associated with drafts from cracks, seams or holes in buildings
The air that leaks in around doors, windows, and electrical outlets, etc. which can be a major source of heat loss.
The exchange between conditioned room air and outdoor air through cracks and openings in the building enclosure.
The uncontrolled movement of air into and out of the conditioned space through cracks and holes in the building envelope.
The process by which air leaks into a building. To find the infiltration heating load factor (HLF), the formula to account for the extra BTUs needed to heat the infiltrated air is BTU/HR = building volume x air changes x BTU/cu.ft/hr x TD (temperature difference).
Infiltration is the unintentional or accidential introduction of outside air into a building, typically through cracks in the building envelope and through use of doors for passageFundamentals volume of the ASHRAE Handbook, Ch. 27, ASHRAE, Inc., 2005. Infiltration is sometimes called air leakage. The leakage of room air out of a building, intentionally or not, is called exfiltration.