AIVC - Air Infiltration and Ventilation Centre

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air leakage

Air infiltration through double-hung wood windows.

Describes apparatus and method of testing wood windows. Each window was tested four times, twice closed but not locked, locked and locked with the sash perimeter sealed. Tests were repeated six months later and again after weatherstripping. gives test results and discusses them. Also reports tests on the air leakage of window frames.

Air infiltration through various types of wood frame construction.

Describes test apparatus and procedure and gives results of air leakage tests on various types of wood frame construction. Also gives the results of tests on the effect of adding sheathing paper, plaster, wall paper and paint. Concludes that air leakage through a frame wall construction containing building paper or plaster properly applied is negligibly small. Single-surfaced walls showed considerable leakage.

Air leakage values for residential windows.

Reviews sources of window air leakage information in the current ASHRAE guide and data book, and standards for air leakage values recommended by industry. Gives results of air leakage tests made on thirty-nine residential windows. Concludes that test results forming the basis of the present guide and data book table are still valid for modern windows of the types covered. Of the new types, sliding residential-type windows have similar characteristics to wood double-hung windows covered by the guide.

The use of sound to locate infiltration openings in buildings

Suggests the use of sound waves to locate openings in buildings that allow air infiltration. Reports results of an experimental program, including laboratory tests of a specially constructed partition and field tests on eight buildings. 

Effect of frame caulking and storm windows on infiltration around and through window

Describes apparatus and test procedure of tests made to show the effect of caulking the crack between the brick wall and window frame and the effect of applying storm sash to the window on air leakage rates. Concludes that the crack between the brick wall and window frame is a very important factor in calculating the infiltration into a room, but that this source of leakage can be practically eliminated by caulking the crack.

Air leakage through a pivoted metal window

Presents results of air leakage tests made on a pivoted window in the Grand Central Palace building under both natural and artificial wind pressures

The weathertightness of rolled section steel windows.

Presents method and results of laboratory tests on the air leakage of rolled section steel windows. Results show that steel windows manufactured of solid rolled sections are, on the average, more weathertight than wood windows.

Air leakage studies in metal windows in a modern office building.

Describes apparatus and test procedure used to measure air leakage through metal windows and gives test results. Concludes that infiltration loss through metal windows can be reduced by about 10% by locking an unweatherstripped window and by an average additional 56% by applying weatherstrips to the locked window.

Air infiltration around windows Luftdurchlassigkeit von Fenstern.

Gives expression for the hourly air volume passing around a window due to pressure difference, and the total heat transference by infiltration. Describes tests made on site and in the laboratory on windows and discusses the resultant curves. The wood framed windows tested were either double-sashed or double- glazed units while the metal-framed windows were all double-glazed.

Air infiltration through steel framed windows

Describes laboratory test performed on four steel swing windows and one steel double-hung window to determine leakage rates at different values of pressure and humidity. Concludes there is a wide variation in leakage rates of well constructed windows. Test results depend on the method of closing and latching windows, leakage for steel swing windows is found to differ when determined with ascending and descending pressure differences because the window is closed more tightly after completion of the ascending pressure difference.