Describes a model for calculating air flow in mechanically ventilated high-rise building. Gives simplifying assumptions of model and basic equations of flow for the network of air paths. The second part of the paper gives an example of the calculation for a seventeen-storey apartment building.

Presents a new method for determining the airborne concentrations of RaA, RaB and RaC in atmospheres contaminated with radon-222. The method employs alpha spectroscopy to measure the count rates of RaA and RaC' present on a membrane filter sample at two post-sampling times. The individual air concentrations and the statistical variances associated with each may then be calculated from the equations given. Presents theoretical and experimental comparisons which indicate the improved accuracy of the spectroscopic method over methods previously available.

The Lawrence Berkeley Laboratory measured the indoor air quality at Fairmoor Elementary School in Columbus, Ohio. A mobile laboratory was used to monitor air outdoors and at three indoor sites (two classrooms and a large multipurpose room); tests were made at three different ventilation rates. The parameters measured were outside air flow rates, odor perception, microbial burden, particulate mass, total aldehydes, carbon dioxide, carbon monoxide, sulfur dioxide, ozone, and nitrogen oxides.

Reports findings of investigations carried out by West German Federal Ministry of Health in July 1978 into the internal climate in the one third of the rooms in a representative West Berlin school which are located in the building core. These rooms have mechanical ventilation and artificial lighting. Gives results of measurements of room temperatures, air change rates, (measured using N2O as a tracer gas), concentration of carbon dioxide and acoustic performance of the rooms.

After a general preliminary discussion of the meaning of "heat recovery" and possible systems for carrying it out, the author examines the possible different ways of transferring thermal energy from one fluid to another by means of an indirect heat exchanger. Air-to-air systems are in particular analyzed, examining the operating features of the various exchange types(rotating, fixed plate, multiple tower and finned tube exchangers). The paper concludes with a series of considerations on both energetic and economic aspects of thermal energy recovery.

An anemometer which was developed for indoor climate research has been modified in order to get the same shape of calibration curve for each anemometer. Experiments in a wind tunnel showed that this was the case for more than 80% of a test series of the modified anemometers. The time constant has increased but is still acceptable. Calibration curves and time constants could be predicted by calculation with reasonable accuracy. Some influence of dust particles on the instrument was noticed.

Briefly describes method for pressure testing a house. Discusses problems and limitations of method. Discusses results of 130 (de)pressurization tests carried out in dwellings in the Netherlands. Gives results of the distribution of air leakage in four houses found by measuring the leakage of all components separately.

With increased concern for energy conservation, many new standards have been developed. Discusses these standards which are of three types, prescriptive, component performance and performance. Outlines several design approaches toreducing air infiltration.

The indoor air quality of five detached dwellings, two townhouses, six apartment units, two mobile homes, one school and one hospital have been monitored. The pollutants monitored were CO, NO, NO2, SO2, O3, CH4, CO2 and total hydrocarbons. Reports results and describes a mathematical model developed to predict indoor concentrations of these pollutants. Briefly discusses the effect of energy conserving measures on indoor air pollution.

Notes that altering interior moisture content of a building can influence both energy use and other performance characteristics. Gives an assessment of the moisture interaction as related to health and comfort of the occupants, fire safety, durability and maintainability and design and construction of light-frame housing. Reviews published recommendations.