AIVC - Air Infiltration and Ventilation Centre

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air leakage

Window air leakage.

Briefly reviews air leakage around windows. Discusses heat loss through windows, dependence of leakage on pressure difference across windows, effect of leakage on condensation. States that tight windows can save heating and cooling costs but weatherstripping is necessary for tightness.

Ventilation and the draught-proofing of windows in old blocks of flats.

Presents results of measurements of ventilation rate and window air leakage made in blocks of flats in Sweden. Describes measurement of ventilation rate using nitrous oxide as a tracer gas and pressurization tests on windows. Gives graphical results of tests. Finds that the majority of windows do not satisfy 1975swedish building code. Reports measurements of air leakage of windows before and after renewal of draught excluders. Concludes that old windows can be made relatively draught-free and that this is not expensive or time consuming.

Adventitious ventilation of houses.

Describes the research being undertaken by the British Gas Corporation on adventitious ventilation. Outlines a test house programme which has quantified adventitious areas for both room components and progressively sealed rooms in dwellings of varying age and construction. Describes a model scale approach to natural ventilation aimed at predicting room air movements and ventilation rates. This work is compared with full-scale results and theoretical models.

Air leakage of buildings - a literature list.

A bibliography of references on the subject of air infiltration, lists references in alphabetical order of author and gives short index to broad subject headings.

Natural ventilation. Ofrivillig ventilation.

Reports investigation of airtightness of two types of industrial wall when subjected to a differential pressure across the wall construction. Laboratory tests were performed on wall units, overlap joints in vapour barriers of plastic sheet,on steel stud wall with metal sheeting and joints in the light- weight concrete element wall being studied. Shows that methods of construction employed so far can be retained if modifications are made concerning junctions and the sealing of joints. In sheet metal walls, the contact pressure onto the plastic foil must be guaranteed.

Recommendations for the grading of windows.

This draft gives provisional recommendations for performance requirements for windows. Gives grades of exposure, speed correction factors for ground roughness and height above ground level. Suggests values for wind loading and limits for air infiltration, water penetration and security.

Air leakage data for the design of elevator and stair shaft pressurization system.

Describes research project to find air leakage values of walls of elevator and stair shafts in order to use these values in the design of pressurization systems. Describes method of test and gives results. Concludes that leakage rates for walls of elevator shafts constructed of masonary units are higher than those of cast-in-place concrete. Variations in the leakage of stair shafts could not be related to the type of wall construction but probably depended on the workmanship in sealing crack openings.

Windproofing in multi-layer walls. Vindtathet hos flerskiktsvaggar

Reports the study of joints for a special type of multi-layer wall which has a windproofing layer of asbestos cement cellulose fibre with timber studding. Describes the construction of these walls. In many cases disturbances in the form of draughts, cold wall surfaces and rain water penetration have occurred. Leakage usually occurred at the joint connecting the walls with the structural fabric. Describes laboratory tests which have consisted of measurement of air leakage in joints and joint details.

Air leakage around window openings.

A sequel to the report "Air leakage through the openings in buildings", abstract. no 286. Reports investigation of the effect on air leakage of increasing the clearance around a sash window. Gives results of experiments in the form of graphs showing leakage for different wind velocities, different clearances, and with and without weatherstripping.

Air leakage through the openings in buildings

Describes apparatus used to measure air leakage through windows. Gives details of windows with and without weatherstripping. Gives results in the form of graphs in two sections.