Reports on a project to assess the air infiltration performance of new residential windows and compare field test results with anticipated performance. Supporting tests and techniques included air leakage tests of windows in the factory, leakage testing of the window/wall installation crack and infrared thermography of test conditions. Tests were also run to determine performance of new windows during cold weather, the possible change in performance over time, the performance of fixed sash and of old and retrofit windows. Presents results of pilot study.
Gives instructions for constructing a super-insulated house. Describes installing insulation, vapour barriers, shutters and an air-to-air heat exchangers. Outlines ways in which heat islost from a house and the problems of conventional structures.
Gives regulations and performance guidelines for the ventilation of buildings. Includes guidelines for air quality and gives recommended supply and return air volumes for different rooms of a building.
Examines the influence of air movement on the thermal performance of the building envelope by identifying and discussing the mechanisms of 8 distinctive air movement paths. These are; convection from interior air to interior surface ; convecti
Describes portable apparatus used to measure the air leakage of houses. A fan is used to exhaust air from the house and the air flow rate is measured. The air flow rate and corresponding pressure difference across the building can then be used to evaluate the relative air tightness to the house. The fan pressurization test equipment is portable, inexpensive and simple to operate. Describes test procedure and gives a few examples of house characteristic curves.
Reports wind pressure measurements being made on a four-storey building at Gaithersburg. Describes instrumentation and techniques for data acquisition, reduction and analysis. Outlines tests to be made on data to analyse the statistical properties of records.
Gives a brief account of exploratory efforts to isolate the contributions of flow separation and reattachment to local surface pressure fluctuations. The study is restricted to tall buildings with sharp vertical edges. Pressure fluctuation measurements were made on small scale models of actual buildings placed in uniform flow of low turbulence level. Gives figures showing mean and root-mean-square pressure coefficients. Finds maximum instantaneous pressure fluctuation was four times the root-mean-square value. Describes characteristics of pressure fluctuations.
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