Examines the causes of condensation problems and ways of reducing or eliminating them. Deals with diffusion through the building envelope, mechanical dehumidification and ventilation. Considers condensation inside cavities and roof spaces.

Adduces the economic advantages of weatherstripping for energy conservation, performance criteria and future developments in materials and fixings. Mentions the advantageous psychological response of personnel. Describes the factors influencing performance - window section, location of seal andinstallation method. Briefly describes the work of the Draughtproofing Advisory Association (DAA). Refers to BS 4315 and demonstrates need for new standards based on air flow measurement round total opening perimeter.

Examines the effects of smoking rate, ventilation, surface deposition, and air cleaning on the indoor concentrations of respirable particulate matter and carbon monoxide generated by cigarette smoke. A general mass balance model is presented which has been extended to include the concept of ventilation efficiency. Following a review of the source and removal terms associated with respirable particulates and carbon monoxide, we compare model predictions to various health guidelines.

There are a number of reasons to question whether regulation should be the primary means of dealing with indoor air quality problems. The nature of hypersensitivity to indoor pollutant exposures is such that any practical form of regulation m

New energy conservation policies in New York State are emerging in response to concerns about poor indoor air quality and related public health risks. The evolution of policy has been away from the promotion of energy conservation without explic

It is only recently that indoor air pollution has begun to attract the attention it deserves in Canadian Governmental and Building code circles. Two main events have been catalytic towards this increased emphasis. First, the ban on the use of ur

The use of urea formaldehyde resins in Canadian houses, the mechanism of formaldehyde releases, health effects, toxicity, carginogenicity, allergic reactions and standards for ventilation are discussed.

The problem of indoor air pollution has many facets, ranging from excess humidity, mould and insects over emissions from gas boilers to high levels of various chemicals in tight buildings. The common denominator of all these problems is the existence of several sources of pollution inside a volume of relatively low dissipative capacity. Where the resulting concentration from a single substance exceeds an already established hygienic standard regulatory measures are straightforward. Assessing the risk of several substances being present at the same time is still difficult.

The problem of radon emission in buildings first came to light at the end of the 1970s, when a report by the Swedish National Institute of Radiation Protection revealed high radon daughter concentrations in some houses. Temporary limits on permitted concentrations in different types of dwellings were imposed in Sweden. They were related to the age of dwellings, due to the known historical use of alum shale in lightweight concrete.

Notes that moisture problems could arise with improvements to thermal insulation of buildings. In addition indoor radon levels could rise. Considers the choice of heating system. Compares total costs of alternative systems. Treats the effects of increased insulation on internal environments. Identifies moisture sources. Stresses this should be regarded as only a limited guideline and that there is a need to ascertain the heat and mass transfer behaviours of building materials, particularly those that affect prediction of the transient behaviour.