The aim of this research was to investigate the flow pattern around a test room which is used for natural ventilation studies. The test cell effectively represents an in-fill development of a low-rise building located adjacent to high-rise buildings. When considering natural ventilation in a building in such a location it is beneficial to understand the local wind flow patterns resulting from the impact of the surrounding buildings on the prevailing wind conditions.

Pressure pans are often misused, and the information they provide can mislead the inexperienced. Bruce Manclark of Delta-T Incorporated (Eugene, Oregon) and Jeffrey Siegel, formerly of Ecotope Incorporated (Seattle, Washington), investigate how mistakes are made, and share their research into one strategy for more accurate pan readings.

This report describes various measurement protocols to be used in the measurement of air change rates in non-residential buildings. The measurement protocols are based on the use of tracer gas techniques.

This report describes results from the first group of field measurements of the air change rate in 49 nonresidential buildings in the Stale o"f California. The air change rate measurements were made using a tracer gas method. Procedures were based on protocols developed in ''Protocol for Measuring the Air Change Rate in Non-residential Buildings." Purpose of the tests was to obtain preliminary data for determining the effect of the various California Energy Codes on the air change rates in non-residential buildings.