Discusses energy saving measures taken in the Ekono office building, headquarter of Ekono consulting engineers, situated near Helsinki. Describes the use of hollow slabs for intermediate floors, tight window construction, the extract air window system, efficient lighting and computer control of ventilation. It is planned to control ventilation by monitoring the concentration of carbon dioxide in the building. Reports measurements of infiltration rate with nitrous oxide as a tracer gas using both constant concentration and decay rate techniques.

Describes the development of an anemometer for the measurement of rapidly fluctuating air flows. Describes the B.R.E. shielded hot wire anemometer. Discusses modifications made to this anemometer to improve its response by using different shields and moving sensor wires closer together. Outlines system for processing signals from the anemometer using a micro-computer. Gives results of performance tests. Gives simple applications of theinstrument.

A simple method for generating values of the monthly mean wind speed from Caton's annual wind speed map has been developed. Gives details of method. Results have been checked against observation as far as the limited data tohand will allow. When derived wind speeds are inserted into the average day computer programs developed in the Department of Building Science at Sheffield University the predicted air temperatures agree reasonably closely with observed air temperatures. Concludes method is practicable for applications in building energy studies.

Proposes a method of linking pressurization measurements in buildings with infiltration rates. The method is based on a simple theoretical model. Gives details of whole house pressurization tests and tracer gas measurements of ventilation rate (using N2O) in fifteen houses. Gives details of the theoretical model and compares field measurements with model predictions. Finds good agreement and concludes model may be used to estimate air change rates using leakage data. Finds surface pressure coefficients for typical house shapes and notes a dearth of data of this type.

The conduction of sound through the gap between window and wall depends on the width of the gap. This width also determines the air leakage, suggesting that air leakage might be measured by an acoustic method. Notes method requires that cracks are relatively large and have fewer than three kinks. Reports measurements in a wind tunnel of air flow through crack models made from aluminium and compares results with theory. Finds empirical expression relating pressure difference to air flow and gives graphs of results.

Reports tests of the effect of various air treatment devices on the radon daughter concentrations within a room. Test were carried out using an electrostatic precipitator, a humidifier and a dehumidifier. The ventilation rate of the room was measured using Krypton 85 as a tracer gas.< Finds that the use of a humidifier, dehumidifier or carbon filter gave no significant alteration to the radon concentrations in the room, but that the electrostatic precipitator reduced the concentration considerably and was equally effective when operated with or without the carbon filter.

This is a short guide to mastics and sealants used to seal the joint between an aluminium window and a structure. Gives table of materials available, and their properties. Gives detailed instructions for applying sealants to window joints.

The reduction of ventilation in buildings as an energy saving measure may result in a deterioration in indoor air quality. Suggests use of contaminant control devices and summarises devices available. These are filters, electrostatic precipitators, mechanical dust collectors, scrubbers, and contaminant combustors Suggests five areas where further research is necessary.

Indoor air quality in an air conditioned California high school has been measured over a variety of ventilation rates ranging from 13.3 cubic feet of outside air per minute for each classroom occupant to approximately 1.5 cfm per occupant.< Parameters measured include outside air supply rate, the occupants' subjective perception of indoor air quality, airborne microbes, carbon dioxide, carbon monoxide, nitrogen oxide, sulphur dioxide and ozone in two classrooms, a halland outdoors.