Describes apparatus used to measure full-scale wind loads on a glasshouse. Wind pressure was sensed by a Dines anemometer and the variation in wind velocity with height by a small pressure tube anemometer. Wind loads on the glasshouse were sensed by pressure tapping points connected in sequence to micromanometers. Describes apparatus for the recording and analysis of data. States apparatus has been used for two years and found to be reliable in operation.

This is a practical handbook for constructing an energy efficient house. Describes energy conservation measures for the reduction of space heating in an average house on the Prairies. Describes conservation measures for a new house which include the improvement of air tightness, insulation, passive solar gainand insulation of window systems. Also describes refitting an older house, reducing energy used to heat water and reducing electricity consumption. Gives a short list of sources of information.

Presents a method of analysis to separately quantify the amounts of heat loss due to transmission and to air infiltration. The analysis is based on daily gas and electricity readings for a flat. Discusses three models for calculating heat losses; the regression model, the static thermal model andthe dynamic thermal model. Only the static and dynamic models have the ability to predict some of the individual terms in the heat balance equation.< Concludes that all three models may be used for a first estimate of the total amount of energy consumption.

Gives comprehensive and detailed instructions for the design and construction of airtight buildings. Discusses the problems involved in building an airtight house. Gives details of materials and methods for sealing joints, installing a vapour barrier and adding thermal insulation. Notes the difficulties in making penetrations for services, such as for electricity, water, space heating and ventilation, airtight. Describes three projects - at Taby, Umea and Akersberga - where test houses were constructed and gives details of their construction.

The daughter products of radon are chemically active materials which, when inhaled are very likely to deposit in the respiratory tract. Defines a special unit, the working level, to indicate the radiation burden from radon daughters. Reports study of exhalation rates from various building materials made by enclosing samples in containers and analysing air samples from the containers. Gives table of results. Discusses control of airborne radiation by increasing the ventilation rate, sealing room surfaces, mechanical circulation and filtration of the air.

Fresh air requirements in individual rooms of an occupied house vary between 0.5 and 2 air changes per hour depending on the number and activity of the occupants. The most common method of ventilation control is by opening windows but measurements show that even quite moderate window opening results in air change rates greater than 2 air changes per hour throughout a house.< Reports measurement of the energy cost of window opening in a test house with a heat loss coefficient of 5 kWh/K day. Finds in a low energy house,controlled ventilation is essential.

Reports investigation of the radon concentrations in Swedish homes. The concentrations of radon and daughter products, air change rate and gamma levels have been investigated in 63 dwellings in seven types of houses built at the beginning of the 1970's in the town of Gavle. Gives table of results. From these results the absorbed dose in the basal cells of bronchial epitheiuim in the lung has been calculated for various periods.

The authors have developed a Fortran IV computer program for estimating whole body and lung dose equivalent rates due to naturally occurring radionuclides in building materials. Two of the inputs to this program are the effects of wall thickness and the effects of a surface sealant on the gamma exposure ratedue to the increased quantity of radon daughter nuclides trapped within a wall.

Reports study of the emanating power of radon from building materials. Samples of material were placed in an air-tight glass container and the radon diffusing from the sample was measured in an electrostatically operated cylindrical steel chamber in which alpha particle scintillations were counted.< Gives main results for different building materials in the form of anemanation coefficient, defined as the ratio of migrating 222Rn to the 226Ra content in the sample. Materials tested were fly-ash, slag, by-product gypsum, red brick, silicon brick, portland cement, and soil.

Reports methods used to measure the concentrations of Rn, Tn, and their decay products indoors and outdoors. Radon and Thoron concentrations are detected continuously by collecting the positively charged RaA and ThA atoms on a surface-barrier detector using electric field precipitation.< The concentrations of Radon and Thoron decay products were determined by collecting them on a membrane filter and simultaneously counting the activities by means of a collimated surface-barrier detector.Indoor and outdoor concentrations are measured simultaneously under different ventilation rates.