Ventilation of dwellings and its disturbances

Treats importance of keeping uncontrolled ventilation to a minimum in buildings equipped with balanced ventilation. Provides theoretical and experimental description of leakage of air past windows. Includes comparison between standards of different countries. Discusses effect on building ventilation of variations of wind and outdoor temperature. Considers in conclusion measurement of air flows between rooms in a building. Describes development of tracer gas method based on computer-assisted evaluation.

Ventilation in small house Ventilation i smahus : kunskapsbrist minskar energispdrandet

Discusses actual ventilation rates in small houses and the requirements of Swedish building regulations. States that regulations do not take a total view of the energy balance in small houses, and pay no regard to the interplay between different forces.< Discusses a newly built 1.5 storey house as an example. Outlines problems in ensuring a low air change rate.

Natural radiation in the urban environment.

Summarizes previous work on natural background radiation levels and reports some new data from Boston Mass.

Model-scale tests in turbulent wind part 2. Phenomena dependent on the velocity pressure.

Describes apparatus and experimental techniques for full and model scale measurements on test buildings. Discusses "blocking effect" of a large model in a small tunnel. Shows that model law derived in part one is valid forphenomena dependent on wind velocity. Compares model to full-scale tests. Discusses air flow around a house, pressure on walls and different types of roofs

Model-scale tests in turbulent wind. part 1. Shelter at houses- dispersal of smoke.

Describes instrumentation used to measure air flow and pressure. Presents laws for turbulent and laminar flow in a wind tunnel. Reports model experiments to investigate the flow behind a solid screen and control experiments to check the model laws. Discusses measurements made at full scale on a school and on a model of the school. Describes experiments on the shelter behind houses and the dispersal of smoke from a chimney.

Natural ventilation in hospital buildings report no 15. operating manual for the "crkflo" computer program

Describes computer program developed by BSRIA to predict ventilation rates and directions of air flow in buildings for given sets of conditions. These conditions are wind speed and direction, temperature differences between inside and outside the building, air leakage characteristics of the components and the mechanically induced air flow rates. The report is in the form of anoperating manual for the program.

1 Infrasonic impedance measurement of buildings for air leakage determination.

Reports preliminary research directed towards developing a new method for measuring the air leakage property of an enclosure. The low-frequency acoustic impedance of the enclosure is measured by an infrasonic method. Describes and analyses a diaphram-type motor-driven source and a pressure sensor with electronic filters used to measure infrasonic impedance.< Reports tests run in enclosures of different volumes and degrees of leakiness.

Air infiltration in buildings : literature survey and proposed research agenda.

Reviews past research in air infiltration, discussing various models. Proposes research agenda. Gives anotated bibliography. Describes commercial and residential models. Gives test results and a summary of the models.

Infiltration and heat transmission, Tjyvdrag och transmission.

Notes dangers of incomplete theoretical models distorting technical progress. Cites as example determination of U-value in estimating energy losses through building envelope. Concentrates on considerable energy loss caused by air infiltration, in addition to heat transmission. A step towards a better understanding of total energy flow through building envelope is a method of calculating air leakage. Describes calculation results for a house which show that air tightness is an important property of the building envelope which cannot be neglected.

Infrasonic measurement of building air leakage-a progress report.

Describes infrasonic method of measuring the air leakage of a house or apartment. Describes apparatus, consisting of a motor driven source of known output a sensitive pressure pickup and anelectronic signal processor. A low frequency (about one cycle per second) alternating air flow of known magnitude is applied to the interior of the building, and the alternating component of inside pressure that results is measured. The pressure response is a function of the type and size of leakage paths. Describes measurements made on three interior rooms and gives sample results.

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