Describes a technique for measuring air flows between internal zones of houses. Gives the theory of measuring one and two directional flows and describes the equipment used for practical measurements. Uses Freon 12, Freon 114 and BCF as tracer gases, and measures their concentrations using a gas chromatograph. Includes specimen results of one and two directional flows between a house and its roof. Discusses the possible applications of the method in houses.

Makes an experimental investigation of the distribution of pressure differences across the walls of a 20-storey student residence building at the University of Ottawa. Measures the wind velocity at the test building as well as the temperature distributions both inside and outside the building.

Describes full-scale measurements of wind pressures carried out on a high-rise building situated in an urban area and having an almost rectangular plan. Summarizes the results of measurements of the wind pressures acting on the windward and leeward faces of the building in a nearly face-on wind. Presents pressure coefficients, probability distributions, peak factors, power spectra and coherences.

A knowledge of the pressure fluctuations on buildings exposed to strong winds is important for wind loading calculations. Presents the statistical quantities of such fluctuations in terms of rms values and power spectra for models resembling the Aylesbury experimental building of BRE, and compares this with full-scale results. Suggests that, provided the properties of the longitudinal velocity component are suitably simulated, then agreement between full-scale and model results in terms of rms values and power spectra can be achieved.

Gives a survey of the weather parameters used for the "Danish test reference year TRY" and the corresponding set of data from meteorological observations made during a 15 year period. Describes the measuring methods used for the most important weather parameters, and presents selected tables and diagrams with some of the most important weather data. Gives possible fields of application for the test reference year.

Briefly describes the new DIF standard for ventilation plants and the Danish standard DS 447. Discusses the relationship between heating and ventilation. Mentions heat recovery and problems encountered in ventilating swimming halls.

Completed studies indicate that emissions from indoor sources, including those from unvented gas appliances, do not cause any undesirable effects in buildings with normal ventilation rates. However, recent energy conservation measures aimed at reducing ventilation rates have increased the problem of indoor pollutant levels, and there is a need for new, more detailed data on the indoor environment. Describes a programme initiated by GRI to collect such data and to develop control techniques for indoor pollutants.

States that windows and doors are the biggest source of energy loss in a house. This happens by air infiltration, conduction and radiation. Covers ways of cutting these energy losses to a minimum, including weatherstripping, installing storm doors and incorporating an air lock into the entrance door design.

Briefly reviews different types of air-to-air heat exchangers, and their relative efficiency. Discusses their effectiveness in removing indoor pollutants such as radon and formaldehyde from tight houses.

Decribes the "collector chamber" method, where a room or whole building is pressurised and the air leaking through the target areas is collected with apressure compensated chamber to a measurement device.