An experimental investigation of wind-induced pressure loads acting on two square-plan flat-roofed model structures (50ft and 225ft high in full scale) is described. Measurements of mean, peak and root mean square pressures acting on points and over larger roof areas have been made in turbulent boundary layer flow simulating wind over urban and open country terrains. Area loads on the roofs have been measured both by a pneumatic-averaging technique, and by using a large flush-diaphragm transducer.

Describes detailed experimental analysis of the low energy Plainevaux House with regard to:< 1. Air infiltration, measured by the decay rate of CO2 tracer gas< 2. Air tightness, measured by the fan pressurization technique< 3. The evolution of inside temperature in a period of no-heating< 4. The corresponding air contamination.

In most office buildings, the continuous renewal of air cannot be guaranteed by means of ventilation through windows during any optional time. It is known (in the case of radiators and window ventilation) that when a window is open the ventilating heat cannot be recovered and other heat losses will occur.< The paper proves that the heating of a building by air is a greater energy saver then the conventional solution through static heating and window ventilation.

Measurements made in Finland have shown that the airtightness of many small houses is lower then the level of requirements specified in Sweden. States that the most important areas for sealing up external walls in concrete structures are the joints in the internal shell, the joints between concrete and timber structures, and the joints between door and window frames. All these areas can be made airtight by using appropriate materials and construction methods. In general, the air tightness of small concrete houseshas been found to be good and to comply with the specified requirements.

Describes tests performed on laboratory manufactured and prefabricated concrete specimens, to determine air leakage rates through cracks. Shows the expected increase of air leakage for increasing crack width and the decrease for increased element thickness. Appropriate theoretical assumptions are described, and the results show relationships for the calculation of the magnitude of air leakage through cracks.

The radon contents in the two wings of a university building in Tampere were measured. Outside air was supplied to the corridors where it flowed to the rooms via ceiling ducts. Lower radon values were obtained in the rooms located close to the air supply end of the corridor. Radon content was also higher on the first floor then on higher floors, probably because of radon emission from the gravel layer in the foundation. Notes that the main source of radon in a wooden building is the ground, and the tightness of the floor construction is therefore very important.

Presents the extra costs in new housing of a number of measures designed to reduce space heating costs. The measures used to reduce energy consumption in new houses in Sakatoon were:< 1. airtightness with controlled ventilation< 2. superinsulation< 3. use of the south windows for passive solar gain.< States that results are applicable in most parts of the Canadian prairie.

Identifies the main categories of seal used in weatherstripping doors and windows. These include compression seals which are compressed during closure to form a seal, wiper seals which form a seal as they slide over a closing surface, and gap fillers and sealants which restore a fit between closing surfaces. Outlines broadly the merits and disadvantages of each, and provides general guidance on seal selection and application.

Discusses difficulties inherent in multiplexity of full-scale trials and the use of EDP simulation in models. Considers the measurement of low air movement velocities using different types of anemometers and field trials in lecture rooms and open-plan offices. Reports on studies into ventilation efficiency and full scale trials. Reviews International Institute of Refrigeration Congress held in Essen September 1981.

Presents author's impressions from 2nd International Indoor Climate Symposium at Amherst, USA, where 130 new research papers were presented. Considers pollution sources such as NO2, CO and the use of UF foam for thermal insulation.