Reviews tracer gas methods for measuring ventilation rate and discusses the diffusion of gases. Describes four tracer gas methods; rate of decay, equilibrium concentration, transfer index and constant concentration. Discusses the analysis of results. Describes an experimental room and series of measurements of air change rate using two methods a) rate of decay, where a balloon filled with gas was burst as a point source and b) equilibrium concentration where tracer gas was released continuously at a constant rate.

Reports measurements of natural ventilation and leakage rates in two test rooms in a university building. Describes rooms and instrumentation. Gives results of pressurization tests with windows closed but not sealed, sealed, and weatherstripped. Gives results of measurements of ventilation rate using N2O as a tracer gas. Discusses the analysis of results and experimental errors. Compares measured rates with ventilation rates calculated using crackand ASHRAE methods.

This is a practical handbook for retrofitting existing buildings. Describes with illustrations the addition of insulation, weatherstripping windows, and doors, addition of triple glazing and the installation of a vapour barrier. Discusses the savings for three different climate zones in Sweden.

Surveys published ventilation rates, primarily of single housing units. Finds helium is the most commonly used tracer gas and that average annual ventilation rate of most occupied houses is between O.5 and 1.5 air changes per. hour. Summarises important recommendations and gives bibliography of 230references.

Describes the use of mechanical ventilation coupled with heat recovery devices in residential buildings to maintain acceptable indoor air quality and conserve energy. Gives tables showing the energy saving possible with a heat exchanger.

Describes a mobile laboratory designed for research and development studies of ventilation and energy utilisation in residential and commercial buildings. Describes the trailer and instrumentation chosen. Discusses factors considered in the design of the laboratory.

Describes Lawrence Berkeley Laboratory's air pollution research project, giving the main goals, parameters to be measured and instrumentation. Describes studies, using an experimental room of 27 cu.m., which measure the emissions from a gas stove operating under air change rates of from 0.25 to 10 changes per hour. Gives graphs of results. Finds that gas stoves generate extremely high concentrations of pollutants when the air change rate is less than one per hour.

Reports field monitoring program by the Lawrence Berkeley Laboratory to assess the potential impact of reduced ventilation of indoor air quality. Three houses, designed to be energy-efficient, were monitored using a mobile laboratory. Parameters measured included infiltration rate, CO2, CO, NO2, NO, O3, SO2, HCNO, total aldehydes and particulates.

Discusses five different models for predicting air infiltration. Presents a new model developed at the Institute of Gas Technology. The model is based on the results of tests to obtain the contribution of the existence of a chimney, and furnace operation, to house air infiltration. Reports verification of model by simulating results from 23 test homes. Concludes that model simulates with reasonable accuracy the measured values for a single-storey home equipped with an oil-fired central furnace.

Reports the use of thermography for evaluating the effectiveness of a number of different retrofit measures carried out on single family dwellings in Twin Rivers. Discusses the use and limitations of thermography. Gives thermograms of parts of the houses before and after retrofit. Finds thermography is an effective tool for evaluating these retrofit measures which decreased the energy consumption by about 25%.