LoginDescribes how ventilation rates in two houses with recirculating air distribution systems were monitored by injecting CO2 tracer gas into the supply and measuring its concentration in the return air.
Bibliographic database Airbase
AIRBASE is the Bibliographic Database of the AIVC. It contains publications and abstracts of articles related to energy efficient ventilation. Where possible, sufficient detail is supplied in the bibliographic details for users to trace and order the material via their own libraries. Topics include: ventilation strategies, design and retrofit methods, calculation techniques, standards and regulations, measurement methods, indoor air quality and energy implications etc. Entries are based on articles and reports published in journals, internal publications and research reports, produced both by university departments and by building research institutions throughout the world. AIRBASE has grown and evolved over many years (1979 to present day, over 22000 references and 16000 documents available online). For most of the references, the full document is also available online.
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Describes the determination of infiltration rates for houses in Seneffe. Gives infiltration rates for individual rooms, found using O2 as tracer gas, and recording wind speed and direction.
Developes mathematical model of air infiltration based on crack flow equations. Describes measurements made on test house. Shows that actual pressure distributions in walls deviate considerably from values in guidebooks.
Describes measurements made to compare ventilation rates in six Belgian houses with both natural and mechanical ventilation systems using O2 and N2O as tracer gases. Ventilation rates were correlated with wind speed.
Reports measurements made in a flat in the Netherlands of internal to external temperature and pressure differences, wind speed and direction, position of windows and doors -whether opened or closed- and ventilation rates.
Reports study of the potential for energy saving in an old low-rise, 50 unit apartment building. Energy use and heat balance of the building are calculated including heat loss through conduction and air infiltration.
Studies effect of joints between building components on air tightness of buildings, and the factors which influence the air leakage through a joint.
Describes the results of an investigation carried out to determine the rate of fresh air infiltration that is experienced during the winter in a modern air conditioned office building.
Describes the influence on heat resistance of an insulated wall of workmanship and forced convection. Compares experimental investigations on cross-bar walls with calculated values.
Discusses basic physical features of combined energy and moisture flow in porous building material.
Describes different methods for sealing joints. Gives method for testing permeability of joints to wind and rain.
Discusses variations in the test results which occur with the laboratory procedures for assessing the air and water penetration attributes of windows.
Reports measurements in seven groups of town house in Gavle, Sweden of concentrations of radon and daughter products.
Discusses fresh air requirements and tolerable levels of contamination from various sources within a space. Explains the calculation of dilution rates.
Shows by comparison with simplified methods for dimensioning structural beams that the degree of tightness of a shell is not the arithmetic sum of the leakage of components.
Describes investigation of air infiltration in a house using chlorothene as a tracer gas. Gives table of the data collected. Reports the unexpected result that infiltration rates could bereduced by increasing inside relative humidity.
Developes a simple procedure for calculating exterior wall pressure differences and air infiltration rates for various wind velocites and direction by applying the pressure data obtained from a wind tunnel model study to a computer model building.
Gives theoretical justification for the use of tracer gas method for measuring air infiltration. Describes automated instrumentation system using sulphur hexafluoride as a tracer gas.
Studies influence on energy loss of an air curtain installed at building entrance.
Reports recent studies showing that seasonal efficiency of oil-fired residential heating systems is in the range 55-75% compared with steady-state efficiency of 80% or more.