Environmental assessment of industrial buildings using BREEAM.

The environmental assessment of buildings is a potentially powerful means of reducing environmental impacts including those arising from energy consumption, writes Josephine Prior, Alan Yates and Paul Bartlett, Building Research Establishment

A four zone ventilation test facility.

This paper describes a laboratory model for the testing and validation of tracer gas measurement techniques. Previous attempts at experimental validation have often been limited to two zones, or a particular measurement strategy, or a particular range of flows. The model consists of four zones, each of 1m³ internal volume. The zones are connected so that all possible inter-zone flow paths exist. The flow down each path is driven by a pump and monitored by a flow meter. A control panel enables any combination of interzone flows to be set, within the capacity of the pumps.

Panel discussion: measuring ventilation rates.


Concentration and entry don't always coincide.