Infiltration heat loss has become more important in the energy loss of modern buildings. It depends on a variety of factors. Computer analysis points to the effect of storey number, ground plan features and exhaust ventilation systems. Different rooms exhibit infiltration heat loss maxima at different outdoor temperatures.
Summarizes a study reviewing indoor air pollution in housing in Canada. Concludes that 1, many materials and conditions which contribute significantly to indoor air pollution are known to be present in Canadian houses, 2,individual susceptibility to air pollution varies, 3, smoking remains a major source of pollution, 4, some energy conservation measures aggravate indoor pollution problems, 5, the full health, social and economic costs have yet tobe determined, and 6, acceptable levels of effects on health have not been defined.
This paper describes a framework and methodology for developing and evaluating surveys of occupants for indoor air quality studies. Factors to be studied, and how they can be classified, are addressed. How the often substantial information can be obtained in a stepwise fashion without burdening theparticipant unduly, and ways of judging the efficacy of the questions are also discussed.
The effect of reduced air infiltration rate caused by energy-saving measures has been studied by comparing the indoor climate in 25 sealed apartments with the conditions in 25 unsealed apartments in Denmark in four seasonal periods.
The effects of different ventilation practices on levels of carbon monoxide and nitrogen dioxide from an unvented gas range were studied under controlled conditions at an experimental house near Washington, DC, USA.
Mechanical ventilation systems in large office buildings are designed to meet space conditioning loads and to maintain acceptable indoor air quality. In order to achieve acceptable air quality, the ventilation systems are designed to bring in a mlnimrm amount of outside air whenever the building is occupied.
Wind tunnel tests were carried out using models of fallout shelters to determine correlations between shelter ventilation rate, area and distribution of wall openings, and wind speed and its direction relative to the orientation of the shelter. Models of bermed shelters with five different opening configurations were used in these tests. A simple correlation was formulated between the shelter ventilation rate, the total area of windward openings, the ratio of leeward to windward opening areas, and the velocity of the approach wind.
A study has been made, both experimentally and analytically, of the characteristics of thermal performance of high-rise buildings using an idealized model building with a number of openings at various locations and temperature distributions. The building was assumed to have no internal partitions. The effect of the factors affecting the location of the neutral pressure level was of particular interest.
A series of laboratory tests for moisture problems were conducted on an air infiltration barrier. One series involved the condition where warm and moist indoor air circulates through wall cavities.
The fan pressurization method has been widely used by groups working with building retrofits and with new construction to evaluate the air tightness of building envelopes.
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