A study was made of one hundred subjects who were exposed to air flow with a turbulence as occuring in typically ventilated spaces. Turbulent air flow is seen as more uncomfortable than laminar flow. Each subject participated in three experiments at air temperatures of 20, 23, and 26 degrees C, withvarying air velocity and turbulence intensity. Recommends a reduction of velocity limits specified in existing standards.

Recent work by the National Radiological Protection Board indicates that higher than average levels of exposure due to radon occur in the South West. West Devon District Council has undertaken its own survey on radon concentrations to see whether these can be associated with lung cancer incidence. The control of radon gas is likely to have implications for building structure and ventilation. There is a potential conflict between the desirability of increasing ventilation to cut radon levels on the one hand and reducing air infiltration to save energy on the other.

Starting from the premise that condensation in the building envelope is a prime cause of its deterioration, the mechanisms that cause condensation are discussed and control measures explained. The conflicts that arise between some of these measures, the probability of achieving them under realistic construction conditions, and the possible need for fail-safe provisions should complete success not be achieved, are described.

The paper focusses on local energy conservation measures, and on programs and policies that deal with rental property issues, directly or indirectly, whether they may help or hinder energy conservation. Local programs studied are: U.S. - Boston, Chicago, Minneapolis, San Francisco; Italy - Brescia, Reggio Emilia, Modena, Bologna; Germany - Berlin, Saarbrucken, Rhein Main. Sweden discusses four national programs that are locally administered; building codes, loans and grants, local energy advisors, and general information.

The objective of this study is to provide an explanatory model for total energy consumption in electrically heated single-family dwellings, based on publicly available socio-economic records in Sweden. An earlier study based on 3,200 houses, divided into 93 groups of similar design, has shown that energy consumption for one house may be twice that of another house in the same area, built to an identical design. The problem is: how much of this scatter depends on occupancy behaviour? The present study is based on 78 similar houses, electrically heated, built as one group in 1969.

This report gives a summary of research and its results at the Department of Building Science, Lund Institute of Technology, Sweden. Fields of research are: design and performance of low energy new buildings, energy conservation in existing buildings, utilisation of solar heat, climatic control, climatic control in foreign climates, especially desert climates, and moisture research.

A project was formulated for the purpose of studying the possibility of improving indoor climate in hot countries without the use of fans and/or air conditioners. This climate regulation technique is here termed passive climate regulation. In the present report the results of the first stage in a series of studies are presented and discussed. In this stage the principles involved are outlined and the computational techniques are demonstrated for relatively simple cases.

The effects on ventilation behaviour of inhabitants in residential buildings have been investigated as a part within several years' German R and Dprogramme. The investigations have shown that the ventilation behaviour seems to be dominated by traditional behaviour patterns, e.g. ventilating bedrooms, and subjective impressions. There is only a modest correlation between window opening and needs for indoor air quality and energy conservation. Up to nowmost of the inhabitants do not assess correctly their own window opening behaviour.

20 low-income family houses were studied for Air Changes per Hour and Equivalent Leakage Area as measured by the Blower Door Test during the winter of 1985-86. The residents of 10 of these homes were given instruction on air sealing techniques and were provided a "starter kit" of retrofit materials. Upon retesting, these 10 homes showed no improvement in either ACH or ELA,indicating either a lack of interest on the part of the householders in making their homes more airtight, or an inability to do so based upon insufficient information or physical limitation.

A design process is developed for an OCCUPANCY RELATED VENTILATION CONTROL SYSTEM (ORVCS) in a new entertainment centre in Sha-tin, Hong Kong. The aim is to reduce the cost of space cooling. Little work appears to have been done in using ORVCS in conjunction with space cooling up to the present time. Thedesign process includes (a) the selection of a control parameter to modulate the fresh air supply rate (b) assumptions about the occupancy load profile and (c) estimation of the possible energy savings.