Introduction

Physical and Chemical Exposure Unit Exposure Modelling and Environmental Noise Group

Objectives

The focus of the activity is urban & indoor air pollution exposure assessment, seen as part of human health risk assessment and also considering the needs of urban and indoor air quality management. Specific examples of the working areas of ECA are:

BUILD UP overview paper on ventilative cooling available!

Ventilative cooling refers to the use of natural or mechanical ventilation strategies to cool indoor spaces. The use of outside air reduces the energy consumption of cooling systems while maintaining thermal comfort. The most common technique is the use of increased ventilation airflow rates and night ventilation, but other technologies may be considered as well. Ventilative cooling is applicable in a wide range of buildings and may be critical to realise low energy targets for renovated or new Nearly Zero-Energy Buildings (NZEBs).

What is ventilation?

Definitions covering ventilation and the flow of air into and out of a space include:

Purpose provided (intentional) ventilation: Ventilation is the process by which ‘clean’ air (normally outdoor air) is intentionally provided to a space and stale air is removed. This may be accomplished by either natural or mechanical means.

What is infiltration?

This is the uncontrolled flow of air into a space through adventitious or unintentional gaps and cracks in the building envelope. The corresponding loss of air from an enclosed space is termed 'exfiltration'. The rate of air infiltration is dependent on the porosity of the building shell and the magnitude of the natural driving forces of wind and temperature.

Member organizations

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