Simplified technique for measuring infiltration and ventilation rates in large and complex buildings: protocol and measurements.

The 'Simplified Technique' is a method by which it is possible to determine approximately the infiltration and ventilation rates of large and complex buildings. The aim is to provide a reliable and easy-to-use procedure for non-specialists. This paper describes a working protocol for using this technique. Results from computer model studies are given to provide guidance on use of the technique and its potential accuracy. The paper concludes with a description of field measurements in two naturally ventilated office buildings using simple, robust and inexpensive hardware designed for this purpose.