This report analyses the data obtained from windows tested for the British manufacturing industry over the past ten years. The tests were conducted according to BS 4315: Part 1: 1968 and the results compared with the stated performance levels given in BS Draft for Development 4:1971. Possible trends in design and performance are indicated.
This report analyses the data obtained from 134 windows tested for the British manufacturing industry since the inception of new test methods in 1983. The tests were conducted in accordance with BS 5368 and the results classified according to BS 6375: Part 1: 1983: Classification for weathertightness. Possible trends in design and limitations in the application of test results are indicated.
This paper describes the development of a computational air flow modelling technique, and identifies applications within clean room installations. Details are given of a validation exercise in which air flow patterns and velocities for a number of simple 2-dimensional configurations were both measured and predicted. The good agreement between measurements and predictions clearly demonstrates the usefulness of the method.
This paper examines the frequency distribution of indoor radon concentrations and air exchange rates in conventional and energy-efficient houses, discusses radon source magnitudes, compares the distribution of source magnitudes with information on emanation rates from source materials, and, finally, considers the ways in which variability in source magnitude might affect regulatory efforts to control indoor concentrations of radon and its daughters.
This paper reviews the literature on sources and measurement of natural airborne radionuclides and radiation in buildings. It also briefly reviews control measures and suggests areas for further research. The major emphasis is given to radon 222 and its daughters, since they typically cause thelargest organ dose to the general population, most of which arises from indoor exposures. The indoor radiation field from radionuclides fixed in building materials and soil is also given substantial treatment.
Carbon monoxide and nitrogen dioxide were monitored in 12 homes on a real-time basis to determine their transient concentrations, their dispersion through the homes and day-to-day variation in pollutant levels. Kitchen ventilation was determined using sulphur hexafluoride tracer gas, and use of unvented gas appliances was monitored with thermo couples. A week-long measurement programme was undertaken in a wide range of homes to determine the distribution of carbon monoxide, nitrogen dioxide, particulates and organic compounds.
Final report on the performance of 177 low-energy houses at Pennyland, Milton Keynes, UK. Pressurization tests showed an air change rate of 0.3 ach for the Pennyland houses, compared to 0.7 ach for the control Neath Hill houses. Three quarters of the houses had some condensation and over a half had some mould growth.
The mean and dynamic internal and external pressures of an existing building (tennis hall) and a model of the building were measured and compared. Asystematic examination was made of the effects on wind-induced internal pressure in simple geometric models of flow profile, wind direction, building dimensions, openings and leakiness. Suggestions are proposed for changes to DIN 1055 Part 4. The Canadian, American, British and Swiss Standards on wind loads are compared.
The Alberta Home Heating Facility has been used over a five year period to attempt to understand the effects of retrofit procedures on the house structure as a whole. The percentage of total energy attributable toinfiltration is calculated, and the influence of furnaces on natural infiltration rates is discussed. Results of blower tests are given for the six modules and compared with measured infiltration rates.
Sixty houses built with widely different construction practices and located in different areas in upstate New York were monitored for airtightness (using fan pressurization) and integrated radon concentrations in indoor air, household water,
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