Individual mathematical models for formaldehyde concentrations in each of 3 normal rooms in a single family house is used to estimate ventilation rates needed to maintain formaldehyde concentration below the recommended Danish indoor standard (0.15 mg/m3). In an initial period after the house was finished a ventilation rate more than 10x the recommended Scandinavian maximum value (0.5 ach) was needed to keep the concentration below the indoor standard.

States that current building regulations on ventilation are very inadequate. Describes the Scottish Development Department document The future of building control in Scotland. This proposes a local authority liaison committee with reps from building control and fire services to co-ordinate work on operating building control in Scotland. It also recommends approval of standard house types of different conditions between authorities. Suggests this could usefully be introduced to England and Wales.

An estimate of the variation of non smokers' lung cancer risk from passive or involuntary smoking is given as a function of ventilation rate in a typical office, at an occupancy of 7 persons/100m2 as specified under ASHRAE standard 62-1981.

For the transient analysis of the thermal and moisture conditions in multilayer constructions a numerical algorithm and a computer program based on the Crank-Nicholson method and quasi linearisation are formulated. Temperature and moisture content are used as transport potentials. In energy balance equations and conditions, convention and accumulation of moisture, the diffusion flow of water vapour, the capillary and surface diffusion flow of liquid water and the viscous flow of humid air and water are considered. The boundary layer and interfacial balance equations are derived.

The Department of Building Technology, the Technological Institute of Copenhagen, have for several years been developing equipment for continuous measurement of air infiltration. It enables continuous measurement of air change rate in up to ten rooms, the constant concentration method with tracer gas is used, and the results are recorded on a computer diskette during measurement. Analysis of possible measuring errors show that the method is accurate and to within plus or minus 5%. Shows the results of measurement of air infiltration in 10 relatively airtight dwellings.

There have been considerable efforts to estimate risks to health from the present level of indoor air quality. However, there has been comparatively little work to relate these calculated risks to other risks of energy use or conservation, or to determine how large these risks will be in the future. This paper finds that, on the basis of extrapolated trends, risk associated with changes in indoor air quality in the United States. The other two are associated with the expected change to smaller automobiles and the entire coal fuel cycle, from producing electricity to synthetic fuels.

This is the second part of a study on natural ventilation in functional buildings. Reports the results of 23 measurements on a number of partitions, internal walls and one brick built internal wall. Measurements were made in 4 buildings. For the largest leakages measured in these 4 buildings, a strong influence was observed on the ventilation of neighbouring rooms. The opening of a window in a room has notable consequences on the ventilation and air flow in the other rooms. The measured air leakages ranged from 0038 to 0.068 m2 for a wall and .0131 -.0529 m2 for a room.

After a brief treatment of the ideas and aspects that play a role in ventilation, gives a general outline of chosen investigation methods, with a concise review of apparatus and calculation models used. Presents a review of the ventilation investigations carried out by IMG-TNO during the last 10 years in factories, labs, hospitals, auction halls etc.

Presents methods for the measurement of air flow rates, including methods for measuring flow in ducts, at exhaust and supply air devices and for air change rates for using tracer gas.

Presents a simplified method for estimating heat consumption in buildings. The basis of the method are presented, along with an example of how to apply it. The method requires climatic data in a specific form and the way to calculate this is also discussed. Finally, gives some comparisons between results from this method and detailed computer simulations.