This article presents the study of a surgical block with serious deficiencies of Indoor Air Quality (IAQ) located in the Hospital del Rio Hortega (Valladolid, Spain). Block characteristics were identified and symptoms reports collected from 118 workers. At the end of the initial investigation, it was concluded that there was Sick Building Syndrome. Measurements of ventilation and contaminants were made of indoor air (CO, C02, TVOC, anaesthetic gases, at six different points simultaneously) and outdoor air (hospital incinerator).

This guide is divided into four sections, which draw together different areas of BRE radon-related research. It supplements existing guidance. Sump systems are usually very effective at reducing indoor radon levels. The first part of the guide describes the benefits of passive sump systems, ie systems that are not fan-assisted. The second part shows how a single fan-assisted system can be used to treat several adjoining houses. Compared to installing several separate systems, a communal system of this type is quicker and cheaper to install and causes less disruption.

A mathematical model is developed to predict Volatile Organic Compound (VOC) emission rates from homogeneous materials. The model considers both mass diffusion and mass convection processes in the boundary layer between the material surface and the air flow. Establishing the relationship between the surface air flow and emission rate: the model therefore can predict the material emission rate under different environmental conditions.

Building products have been shown to affect the perceived indoor air quality in buildings. Consequently, there is a need for characterizing the emissions from building products in sensory terms to evaluate their impact on the perceived air quality. Determining the exposure-response relationship between concentration of the emission from a building product and human response is recommended. A practical method is proposed based on an air-dilution system connected to the exhaust of a ventilated small-scale test chamber.