English

Weatherstrip for windows and doors were studied by full-scale tests with regard to airtightness, closing force and ageing properties. Tubular strips provided the highest degree of airtightness in both windows and doors, while angle strips were only slightly inferior in performance. The leakage of air was found to be considerably greater for strips of expanded and foam plastics and fibre strips. For tubular strips of small material thickness and for angle strips, the closing force in doors was low.

This paper is a review of past and current research on the subject of wind loads. Topics discussed are present wind load requirements, the determination of basic design wind velocities, the structure of natural winds, wind-tunnel studies, gusts andthe vibration of structures. Gives recommendations for basic design wind velocities, increase of wind velocity with height,and formulation of shape and gust coefficients. Includes bibliography of 270 references.

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.

Describes computer program used to calculate the air flows and pressure differentials in a multi-storey building as a result of a combination of wind effect, stack effect and the operation of air handling systems. Describes mathematical model of building and assumptions and limitations of program. Gives complete listing of program.

Suggests methods of conserving energy in new houses. Gives detailed instructions for installing vapour barrier; constructing double stud wall, insulating walls and windows. Also discusses moisture problems and the use of an air-to-air heat exchanger. Outlines other methods of saving energy and waysof refitting an older house.NOTES An updated second edition has been published as "Energy efficient housing - a prairie approach" abstract no.643.

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.

Describes a general model for air infiltration which will accomodate wind pressures, stack effect and ventilation openings provided the vents are either all above or all below their respective neutral pressure levels. States that main innovation of this model is expressing the infiltration as a function of the shell leakage and of the neutral heights of each face.Describes experimental method for finding the neutral pressure level. Gives typical values of parameters for tight mid-westhouses for light and strong wind.

Describes instrumentation used to measure wind pressure on two tall buildings in central London. Describes pressure transducer which gives an electrical output suitable for use in conjunction with standard types of commercial recording equipment. Describes site installation and recording equipment which produces multi-channel records in ultra-violet sensitive photographic paper. The records are processed and digitised and several computer programs have been written to analyse this data.

Outlines a number of experimental approaches for determining the energy consumption of a building, with emphasis on air infiltration. The combined use of depressurization of the house and infrared scan permits the location of "bypass" vents through which warm air is leaving the structure. Describes several types of bypasses and evidence for their widespread existance is documented. Discusses the side effects of retrofitting these and other energy loss sites with regard to fire safety, air quality and moisture.

Gives theoretical justification for the use of tracer gas method for measuring air infiltration. Describes automated instrumentation system using sulphur hexafluoride as a tracer gas. The system consists of an electron capture detector, an automation unit, an SF6 storage and injection panel, a cassette recorder and corresponding plumbing and tanks. Gives examples of field use of system.