This paper discusses guidelines for testing and balancing, lists qualifications for the TAB agency, and gives an overview of TAB work at various stages of construction
Two systems, one with air re-circulation alone and the other a combination of air re-circulation and energy recovery using plate heat exchangers have been analysed. For these systems, a set of equations was derived for partial or full re-circulation of air with and without plate heat exchangers. Also, as part of the analysis, the reciprocal ratio of investment and running costs was considered. In this analysis, the re-circulation factor provided by ventilation units, a bypass factor and the efficiency of a plate heat exchanger were considered to be variables.
A technique has been developed to estimate the equivalent leakage area needed in residences to provide a quantity of infiltration-driven air exchange which exceeds a design value for a desired level of frequency of occurrence. The technique presented applied an air infiltration simulation model to hourly long term weather data to provide hourly estimates of the infiltration weather factor. Cumulative frequency distributions (CFD) were then used to describe the distribution of these data when 1-, 3-, 6-, 8-,12-, 24-, and 48-hour time periods were grouped together.
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