Discusses the advantages of reducing air infiltration in industrial buildings in terms of energy conservation. States that heat loss due to infiltration is often underestimated or ignored as it is difficult to measure. Concentrates ondoorways as a major source of infiltration, and shows that the type of door used needs to match the requirements of the entrance, such as type and size of vehicle passing etc. Decribes a range of doors suitable for different conditions.

Briefly describes weatherstripping in an industrial building, and discusses different types of seal available for a range of applications.

Measures the pressure on the outlet of a flue on a free-standing scale model in the wind tunnel at IG-TNO, as a function of the height of the flue outlet above the roof, of its position on the sloping roof and the pitch of the roof.

One of a series of investigations of the improper functioning of ventilation and smoke stacks. The problem is essentially one of town planning in which the layout of low and high rise buildings can cause unknown influences at the outlet of vertical stacks on low rise buildings. The study concerns thepressure distribution on and above the roof of a low rise building upwind or downwind of a high rise building as a function of the separation between them for various heights of the high rise buildings.

Reports the results of measurement of ventilation efficiency in a full scale model of a small office with a diffuse air supply, which can be used to improve ventilation efficiency and therefore reduce air supply rates. Steady state and transient definitions of ventilation efficiency are given. Finds that ventilation efficiency depends on air flow rate and heat gain in the office. Higher air flow rates give lower pollutant concentration in the ocupied zone but also more mixing between the occupied and under-ceiling zones.

Treats pilot study where the ventilation was controlled by the carbon dioxide content in the indoor air.

Summarises the sources and the effects on health of tobacco smoke and formaldehyde, and includes general information on air pollution.

Despite having balanced mechanical ventilation, a large number of modern buildings in Sweden have unsatisfactory indoor climate. Problems include mould, irritation of the eyes, nose and throat, skin rashes, feelings of dryness, hoarseness andheadaches. To control ventilation according to requirements the right indicator variable must be selected and the system must permit the proper control in the occupied zones. Measurements of air pollutants were carried out outside and inside a mechanically ventilated office building.

Discusses the problems associated with poor air quality in tight buildings. Considers how problem conditions can be identified and evaluated, and gives some possible solutions to improving air quality. These include turning the thermostat down slightly, increasing ventilation levels, and ensuring that themechanical ventilation system is working properly, or calling in a specialist to identify the problem.

States that in localities which must be ventilated by law such as cinemas, restaurants and assembly rooms of various kinds the fresh air supply is often greatly in excess of what is strictly needed. This excess air has to be transported, and possibly heated, cooled, humidified and dehumidified. Describes how controlling the air quality makes it possible to restrict the quantity of fresh air to the basic requirements, thereby keeping ventilation heat losses to a minimum. The control variable is the room air quality as monitored by a sensor.