Discusses insulation of lofts, roofs, walls, windows and floors, natural ventilation of dwellings and mechanical ventilation with heat recovery in dwellings. Considers cost benefits of weatherstripping and constant-flow ventilators for naturally ventilated houses. Concludes that installation of mechanical ventilation with heat recovery is uneconomic, but adding a heatexchanger to an existing mechanical ventilation system has economic benefits.

Simulation of the thermal performance of a building to take account of uncontrolled infiltration shows that infiltrating air on a leakage path is efficiently warmed up, especially if infiltration flow rates are low. For allowable infiltration flow rates with respect to thermal comfort, (0.5 -0.7 dm3/sm), the heating is 25 - 60 per cent of the temperature difference between the outside and inside air. For the longest leakage path, the incoming air is even near to the room air temperature.

Infiltration models are used to simulate the rates of incoming and outgoing air flows for a building with known leakage under given weather and shielding conditions. 

A study was conducted in 40 homes in the areas of Oak Ridge and West Knoxville, in the summer and winter months, to quantify concentrations of COx, NOx, particulates, formaldehyde, and radon, as well as selected volatile organic compounds. 

In newly built well insulated houses, a wind of 4 m/s will produce an air change rate of almost 0.3 h-1. However it is considered necessary to obtain air change rates of 0.7 h-1. 

Examines providing some existing multifamily houses with mechanical ventilation with heat exchanger by installing new inlet air ducts to bring back the heat contents of the outlet air. 

Reviews literature on indoor air quality in housing, nature of contaminants and their sources, health effects, standards and guidelines, impact of air sealing on indoor air quality, sources of uncontrolled air leakage, airtightness and natural ventilation, airtightness of new and existing housing stock, air change in new and existing housing, impact of air sealing on airtightness and ventilation, indoor air quality in tight houses, impact of occupant behaviour on ventilation, measures to improve indoor air quality, identifying problem houses, indoor pollution control strategies, and ventila

Undertakes a comparison of full scale and model scale internal velocities of naturally ventilated rooms. The FSEC Passive Cooling Lab, an experimental building with a fixed roof supported by columns, whose floor plan and ceilings are reconfigurable, located at Cape Canaveral in Florida, is the building used in this study. The full scale tests were conducted during evening and early night to provide an almost thermally neutral atmosphere, during February and March 1982.

Reviews the literature on wind tunnel modelling of natural ventilation. Lists advantages of using wind tunnels. Discusses strategies for utilizing natural ventilation. Describes the mean windspeed coefficient method and the wind discharge coefficient method of estimating natural ventilation for design of buildings in hot climates, and gives their advantages and disadvantages. Gives criteria for constructing wind tunnel models.

Ventilation and air exchange in buildings and industrial plants can be induced by external winds and by buoyancy forces. The dependence of the air exchange and heat transfer on a large number of factors, including the detailed configuration of the building and surroundings makes an analytical or numerical analysis of practical design problems impractical, particularly when both the buoyancy and the wind-induced pressures are of the same order of magnitude.