Reviews experimental techniques for determining the infiltration characteristics of buildings. Discusses the use of wind tunnel models to determine surface pressure distributions and ventilation rates. Reviews the measurement of open areas and leakages. Discusses correlation of measured leakage and ventilation. Describes the British Gas method of measuring ventilation rates using tracer gas. The system, known as "Autovent" provides a constant concentration of tracer gas and can be used for the continuous monitoring of ventilation rates.

Measurements have been made of the air-leakage rates through structural components of conventional metal-panel and concrete buildings which may serve as containment for nuclear reactors. The component measurements included structural penetrations such as doors and louvers as well as materials such as caulking compounds, gaskets, and paints. Specimens were sealed inside of test vessels.

Describes an automatic measurement system for air infiltration and discusses factors influencing the measurements in single rooms or in a group of connected rooms. The system works on the decay rate method and is controlled by a purpose-designed controller. The test data are evaluated off-line by computer. Discusses in detail the instrumentation and test procedure Gives results of measurements made in a detached house and correlations of the test data with wind and temperature difference data. Gives a comparison with pressurization data.

Presents a survey of tracer gas techniques for measuring air infiltration and includes a theoretical derivation of the equations, a description of each method, and a short description of the experimental procedure. Derives a qualitative error analysis which concentrates on mixing problems and uses it to compare the strengths and weaknesses of each method.< Derives the theory of multi-chamber infiltration measurements in situations involving many interconnected spaces (network type models).

Describes a method for determining the leakage of an entire building. Each room is pressurized in turn and the leakages of individual rooms are summed to find the total leakage of the building. Derives the equations for calculating total leakage and gives an example of the method applied to a row of three offices.

There is a need for correlating results of pressurization tests with infiltration tests, making it possible to predict the infiltration rate of a building on the basis of a pressurization test. Discusses problems with calculation models

Presents a technique using fan pressurization results and weather data to calculate infiltration. The geometry, leakage distribution, and terrain and shielding classes are combined into two reduced parameters which allow direct comparison of wind-induced and temperature-induced infiltration. Using these two parameters and the total leakage area of the structure (found from fan pressurization) the infiltration can be calculated for any weather condition. Presents experimental results from 15 different sites for comparison with theoretical predictions.

Reviews the source and nature of pollutants occurring in indoor air. Discusses two research projects at the Institute of Hygiene and Work Physiology of the Swiss Federal Institute of Technology in Zurich; one studying the air pollution caused by men; theother concentrates on pollution caused by materials. Outlines methods of investigating odours. Concludes that control measures to reduce emissions are necessary. Recommends that guidelines for a minimum ventilation rate should be drawn.

Describes a dynamic pressure anemometer which belongs to the group of pressure-tube anemometers (pitot-static tubes) and is intended for measurement of one velocity component in a three dimensional flow field at air velocities of 0.1 to 10 m/s. The usable flow direction is unlimited (0...360 deg.) in three dimensions. The maximum error in the indication of the velocity component is less than 5% (if the actual velocity is put at 100%).

Considers the characteristics of flow through small gaps. Discusses relation between wind tunnel measurements and actual wind pressure on buildings and the effect of building shape on ventilation. Derives equations for flow rate through a gap for different temperature and pressure differences and sizes of gap. The equations consider the pressure as a function of time thus modelling the effects of a turbulent wind incident on a gap.