Discusses the sources of radiation exposure for the population of the UK. Radon is the most important natural element. Presents results of national and regional surveys. Remedies and preventive measures are outlined and protection standards are suggested.
Describes laboratory tests to find correct operative conditions for a controlled outside air intake through the air space in the window to provide efficient ventilation without creating draughts.
Describes experiments to measure the ventilation rates of two small open-plan factories, one typical of current design and one designed to be more energy efficient, with increased levels of insulation and a tighter method of construction. Air leakage rates were measured using the Watson House Leakage Tester, and ventilation rates were monitored by the Watson House Autovent System. The problems involved are described, and how they were overcome in this case.
To make an evaluation of ventilation systems, numerical computation was carried out for three dimensional, isothermal, and turbulent flow schemes. It was found that there exists an optimum position for an inlet in relation to an outlet whereby the most effective ventilation can be attained. In addition, similar to the results for the two dimensional computation, the slope of the concentration decay is virtually constant and independent of the position in the room, so the mixing factor derived from this slope can be used as an index of the ventilation efficiency.
Describes a demonstration project to show that, in well sealed houses, trickle ventilators can provide an opening large enough to reduce condensation and odour problems, but small enough to avoid any significant increase in energy use.
Describes the instrumentation and measurement technique used by the CSTB to measure the leakiness of residential buildings. Results of the experiments are also presented.
Covers indoor pollutant levels and their health effects in humans and animals for five principal classes of pollutant: radon, microorganisms, passive cigarette smoke, combustion products, and organic compounds. They are examined from viewpoints such as measurement and source characterisation habitat studies, health effects, risk analysis, and future needs.
A booklet for consumers explaining the effects of house-tightening measures on pollutant levels. It also provides a guide to detecting and controlling pollutants commonly found in homes.
Discusses guidelines produced for the Nordic Ventilation Group. Explains how the designer can select an effective ventilation system on the basis of information on ventilation rates and ventilation efficiency.
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