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.

Reports tests of air leakage made in the joints in a hospital building in gothenberg using a special pressure chamber. Describes test method and gives the values from five readings ina table. The required standard was that "the maximum leakage of air would be 300 litres per m run joint per hour at a pressure differential of 10mm of water". Tests showed that the required standard was met and perhaps that the amount of attention given by contractors and owners to joint problems has increased.

States that much of the heat loss in American houses can be traced to generic faulty details in design and construction. Discusses style of housebuilding in the United States. Notes vast majority of American houses were built of wood. gives a broad classification of typical houses into seven types. Notes variation in energy performance with climatic region. States intention to undertake case studies to assess the energy performance of each type.

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.

Reports the investigation of the natural ventilation of three test houses. Describes the houses which were of standard design. Natural ventilation rates were measured using sulphur hexafluoride as a tracer gas. An energy audit was also performed using a fan to pressurize and depressurize the house and an infrared scanner to detect the leakage paths. The tracer gas measurements were converted to a format similar to thepressurization results by using a previously developed model. Gives results in the form of graphs.

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.

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. 

The amount of air leakage through window gaps in buildings depends on the width and length of the gaps, the pressures across the buildings and the resistances in the air circuit. Reviews the ranges of these factors for Britain and gives results of measurements within these ranges for standard metal and wooden windows and for weather-stripped windows. Gives two methods of estimating the air flow through gaps in complete windows.