English

Discusses the second natural energy conservation program in Sweden implemented in 1980. This sets out to estimate the national energy saving potential, with special reference to existing housing. A refined method for calculation of energy sa

Describes a project carried out by the Bonneville Power Administration where 18 houses at its Midway substation in central Washington were retrofitted and the results monitored for a 3 year period. The houses were divided into 3 groups. During

Indicates that a systematic analysis is necessary if satisfactory results are to be achieved and suggests various stages of analysis. Provides practical examples with illustrations.

Completed studies indicate that emissions from indoor sources, including those from unvented gas appliances, do not cause any undesirable effects in buildings with normal ventilation rates. However, recent energy conservation measures aimed at reducing ventilation rates have increased the problem of indoor pollutant levels, and there is a need for new, more detailed data on the indoor environment. Describes a programme initiated by GRI to collect such data and to develop control techniques for indoor pollutants.

Describes a system installed in the EKONO office building in Helsinki which allows the amount of CO2 in the exhaust air to control the ventilation rate. Uses a CO2 indicator, and adjusts the mixture of exterior and recirculated air so that the amount of CO2 during working hours is kept on ca 700 ppm. Describes use of equipment during winter 1981-82, when exterior air flow is registered. Measures the proportion of CO2 locally in order to study occasional variations that may occur. Studies the proportion of other pollutants in the room air with a gas chromatograph.

Makes an experimental investigation of the distribution of pressure differences across the walls of a 20-storey student residence building at the University of Ottawa. Measures the wind velocity at the test building as well as the temperature distributions both inside and outside the building.

Uses a simple computer simulation program for the assessment of the thermal performance of award-winning architect-designed houses in the Brisbane area. 

States that windows and doors are the biggest source of energy loss in a house. This happens by air infiltration, conduction and radiation. Covers ways of cutting these energy losses to a minimum, including weatherstripping, installing storm doors and incorporating an air lock into the entrance door design.

Sets out the design and construction of pressure test rigs for use in studying leakage rates of windows and doorways in the Arts building of Sheffield University. Tests 7 doors (including fire doors) and selected windows, categorized according to deterioration of sealants. Finds that window leakage is far in excess of the suggested leakage from the CIBS guide (results of infiltration coefficients range from 0.911-6.097). Shows that 56% of the airflow across a doorway is due to the gap between the door bottom and the floor, and that weatherstripping the door reduces the flow by approx. 50%.