Describes a system which measures the rate of air infiltration in buildings using sulphur hexafluoride as a tracer gas. Discusses two methods for evaluating the infiltration rate,the decay method and the constant concentration method. The system automatically operates a portable electron capture detector /chromatograph and samples air on a one-minute cycle. In the decay method the slope of concentration vs time on a semilogarithmic plot can be used to compute infiltration rate.

Reviews use of tracer compounds to demonstrate the transfer of pollutants from one local area or city to another. A study of gaseous compounds resulted in the selection of three suitable materials:sulphur hexafluoride, bromotrifluoromethan andOctafluorocyclobutane. These materials are all non-toxic, rare in the atmosphere and can be readily dispersed from tanks.Describes two systems developed to detect tracer gases. Sensitivity of 10-5 p.p.m. was achieved for sulphur hexafluoride without concentration of the sample. Gives method for collectingair samples and analysing them.

Describes apparatus and test method used for measuring air leakage through metal windows in the laboratory. Gives results for different types of windows and summarises air tightness standards in Japan and other countries.

Outlines the principles of infrared thermography and describes the equipment. Reports investigation at the National Swedish Institute for Material Testing into the use of thermography. Finds that the method should primarily be used as a relative method for plotting of building faults on external walls and for qualitative judging of their nature. It is not suitable for quantitative determination of the heat resistance of walls.Gives typical thermograms prepared using a test wall to which artificial defects were added.

Reports study of the ways in which different ventilation levels affect people part 1 of the study took place in Gavle. Air change rates, the amounts of radon and its derivatives were measured. Finds that ventilation installations are often poorly adjusted giving a wide variation between flats in the levels of air change. Amounts of radon and daughters were also higher than expected, due mainly to the poor ventilation. Concludes that lowering ventilation to present recommended level of 0.5 changesper hour cannot be recommended without further investigation.

Explains method for calculating time dependences and average values of gas and particle concentrations in ventilated rooms, which permits determination of air pollution propagation in a room by means of given target functions. Applies method forvarious ventilation rates. Provides calculated example of determination of gas concentration occurring in a room with a leaky gas container. Illustrates representative time functionfor different pollutants.

Describes computer-based method of calculating heating or cooling capacity of a building, or energy consumed or natural temperature reached without air conditioning. Assumes steady state conditions and establishes heat balance in the form of a matrix separating climatic and occupancy effects. Presents intermittent heating dynamic calculation in non-steady state conditions. Treats causes of uncertainty building use, climate data, air infiltration and presents calculation programs developed in building physics laboratory of Liege University.

Describes operation of thermal imaging cameras with a display monitor detecting infra-red radiation. Since temperature differentials of 0.20C are significant for insulation of buildings, camera must be used to limits of its sensitivity and monitoring procedure must be carefully chosen. Treats measurement limitations in field of building. Uses details of thermographic surveys to illustrate some difficulties of measurement and analysis. Emphasises importance of correct inspection procedures for particular situation.

Wind tunnel test conducted on a scale model of a classroom show that, provided the test air speed is kept in excess of about 3mph, it is feasible to use models for predicting, with good accuracy, the air-flow conditions in and around full-scale buildings. In the case of low-pitch roofs the height of the stagnant zone set up as a result of flow separation occurring at the windward eaves of a building is influenced by wall height rather than by roof pitch.

Treats report investigating results of door opening in terms of energy loss and changes to indoor climate. In 3 sections. Treats: 1) general regulations and manufacturing standards and relevant swedish building regulations concerning airtightness, thermal insulation and functional aspects. 2) Flow of air under different conditions such as pressure differences caused by variations in temperatures and wind. 3) Describes laboratory experiments using 1:10 scale fluid model.