Provides a summary of Report IIIb of the overall research project `air change in buildings' undertaken by the EMPA, Switzerland, sponsored by the Swiss Federal Ministry for Environmental Protection. Describes an investigation into the frequency and duration of window ventilation over an entire heating season by the occupants of 32 flats. Treats the two blocks of flats investigated, the results of questionnaire circulated to the occupants concerning ventilation habits, the measurement and observation methods applied, and the evaluation methods applied to the data obtained.

Provides a summary of Report IIIc of the overall research project `air change in buildings' undertaken by the EMPA, Switzerland, sponsored by the Swiss Federal Ministry for Environmental Protection. Describes a measurement programme undertaken in an unoccupied single family house built in 1979.

Provides a summary of Report IIIa of the overall research project `air change in buildings' undertaken by the EMPA, Switzerland, sponsored by the Swiss Federal Ministry for Environmental Protection. Describes an investigation ontwo identical insulated flats in the same block with the same orientation, one with folding shutters and the other with roller blinds. The occupants were instructed on how to close the blinds at night. Their normal living habits and ventilation preferences were not affected. Illustrates the flats and blinds diagrammatically and in photographs.

Treats the three main factors contributing to ventilation heat loss- natural air exchange driven by wind pressure and temperature differences, air exchange caused by the user and forced air change under the influence of exhaust air installati

Notes research carried out over the last five years in the EMPA sponsored by the Swiss Federal Ministry for Environmental Protection. The aim of the investigation is to elaborate appropriate guidelines for the construction of the building envelope and to develop appropiate guidelines for the construction of the building envelope and to develop appropriate calculation methods for ventilation heat losses. Discusses the main approaches of the various investigations. Gives a brief outline of the individual stages of the research in the EMPA in recent years.

Lists the factors in a building (condensation, comfort, heat loss etc) which are affected by ventilation, mechanical or natural. Treats the driving forces of air exchange in buildings. Describes the four basic flow phenomena involved in air e

Notes that number of houses with radon content exceeding 400 Bq/m*3 is probably far in excess of original estimates. States requirements for new built houses and permitted levels in existing housing. Improved ventilation can reduce risks arising from use of certain building materials now prohibited. Gives details of loans available to combat problem and refers to publication issued by Institute for Radiation Protection on how to assess risk from natural sources and building materials.

Notes that a considerable amount of energy escapes past external doors and the simplest way to avoid this loss is to make sure that doors close properly. Illustrates methods to achieve tight doors and considers inadequacies of certain door closers. Considers potential for development and improvement of heated sluices.

Discusses relatively simple and inexpensive method for ventilating house foundations to reduce radon based on results of a trial on detached housing in Sweden. Principle is to extract radon gas from the ground before it enters living accomodation. Table shows radon daughter intensity before and after corrective measures.

Reports the results of investigations by researchers at the University of Osaka into the air tightness and infiltration rates in houses built with high levels of noise-reducing insulation.