Reports measurements of air infiltration and air leakage of an unpartitioned mobile home, made in an environmental chamber. Infiltration was measured using sulphur hexafluoride as a tracer gas. Leakage was measured by depressurizing the mobile home. Discusses results and uncertainties in the air change rates. Examines dependence of air change on indoor-outdoor temperature difference. Compares results with previously published measurements and discusses anomalies.
Describes different goals of air leakage measurement with corresponding measuring methods. Discusses results and experience from measurements carried out with the stationary overpressure method and the non-stationary tracer gas method. Adds working diagrams. Pleads for further standardisation of thespecific equivalent leak opening (SELO) especially of temperature on which it is based. Gives numerical example for calculating the lower limit of admissible non-tightness of cold rooms.
Reports an experiment to assess the magnitude of air flow through the brickwork of one of the ECRC test houses. Describes apparatus and method and gives results. Also describes smoke and tracer gas tests to detect air flow within the wall structure. Concludes that under average wind pressures ventilation through the wall is negligible but that air from outside may penetrate the building envelope and extract heat from the house without contributing to the ventilation. This heat loss could be as much as 50 to 100 Watts per day.
Reviews the ventilation requirements for residential buildings and the recently discovered contaminants of indoor air which will have an influence on the required ventilation rates. Describes methods of measuring air leakage and the rate of air infiltration. Cites work aimed at finding the correlation between air leakage and air infiltration. Outlines the role of heat recovery devices and recommends areas of further research. An appendix reports on a Canadian Mortgage and Housing Association seminar "Controlled ventilation with exhaust air heat recovery for Canadian housing".
Reports measurements of air leakage rates in the four energy-conservation research houses using the fan pressurization method. One of the houses is standard for the area and the other three houses have added insulation and vapour barriers. One house has a heat pump and one an air-to-air solar heating system. Air infiltration rates were measured in two of the houses using CO2 as a tracer gas. Discusses results and compares tracer gas with pressurization tests.
Defines the method to be used for the air permeability testing of windows to be fitted in exterior walls and supplied in the form of completely assembled and finished units. Describes apparatus, test method and expression of results.
Reports measurements of air leakage in several supermarkets and an enclosed shopping mall, all constructed between 1954 and 1979. All tests were conducted by using a large fan to depressurize the building. Gives graphs of leakage rates. Finds supermarkets are two to four times leakier than schools or high-rise office buildings.
Reports study of wind and rain over fifteen years and gives table of results. Reports measurements of wind pressure and driving rain on buildings. Discusses laboratory measurements of the tightness of facade elements under pressures of up to 50 Pa. and with temperature differences of -40 to +30 deg.C. across the facade. Describes pressurization of buildings and gives results of measurements in test dwellings. Discusses movement of joints in buildings and describes measurement of this movement.< Discusses permeability of both flat and sloping roofs.
Reports a study carried out to assess whether homeowners occupying more highly insulated houses have actually realised fuel savings over those realised by comparable homeowners in less heavily insulated houses. Describes method of the survey which included air leakage tests.
Reviews results of tests carried out during a joint industry/university project. Discusses characteristics of single and two-component foam, airtightness, condensation and safety regulations since polyurethane foam contains isocyanates. Diagram illustrates typical cross-section through window frame under normal conditions and when conditioned at 15 deg. C and 65% R.H.
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