The article describes experiments with wall-mounted air terminal devices. The airflow from an air terminal device influences the occupants' thermal comfort and, therefore, it is important to develop an expression for the flow in the occupied zone. The velocity at the floor is influenced by the flow rate to the room, the temperature difference and the type of diffuser. The flow is stratified at Archimedes numbers larger than four. The article gives expressions for the velocity distribution close to the floor.

A case study of the ventilation characteristics of office accommodation forming part of a recently refurbished building is presented. A mechanical system has been installed to ventilate and cool two floors that are interconnected by a series of atria, with a novel application of displacement ventilation applied where there is a very low ceiling height. The air distribution and air quality within the space have been studied by the application of computational fluid dynamics (cFD) to allow the computation of air change effectiveness in terms of local mean age.

Positive input ventilation systems for dealing with dampness in dwellings have been available for many years, but do they really reduce condensation? A DETR-funded research project has provided some answers

Proceedings of a seminar held on 28 October 1999, at the Institution of Mechanical Engineers Headquarters, London.

A field test protocol to assess the heating season energy impact of operating corridor ventilation systems was developed and successfully applied to five multi-unit residential buildings (MURBs) in Winnipeg. The protocol was straightforward and inexpensive to apply. The data analyses, done in a spreadsheet computer program, revealed a similar relationship between energy use and operation of the corridor ventilation system for all five MURBs.