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Compares LBL infiltration model predictions with air infiltration and weather data collected by MITU. Examines 4 simplifying assumptions in the model:1. The flow through cracks in the building shell can be approximated by orifice flow 2. ""Wind-induced and stack-induced infiltration can be added in quadrature 3. Wind-induced infiltration can be represented by averaging the values for 3 typical aspect ratios 4.

Reports on a study carried out by HUDAC and DBR on four identical detached houses built in Ontario in 1977. House 1 was built according to the insulation requirements of the 1975 Ontario Building Code, the others were constructed with increased levels of insulation and air tightness. Some of the aims are:

Describes the conditions of the "Heat Recovery from Exhaust Air" group of projects of the Swedish Council for Building Research. 

The results of a prediction method for calculating ventilation rates in a detached house are compared with experimental measurements described in aprevious paper. The method is capable of giving good agreement for a wide range of ventilation conditions. The need is demonstrated for further work in two important areas - the spatial distribution of background areas and the effect of turbulence.

This report is a guide to give the canadian builder practical information in the area of energy conservation in new housing. Offers useful suggestions for planning, designing and building a more energy efficient home. Sections covered include energy use in dwellings, air tightness, ventilation andmoisture control, options for improving the building shell, space heating and cooling systems, and cost considerations. Takes the 1979 Ontario Building Code as the basis upon which to develop and evaluate improvements.

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.