In 1984 the municipality of Frederikshavn in northern Jutland, Denmark initiated a project for the climatic design of a new housing area. The site is particularly exposed to strong winds all the year round and one of the major tasks was to design the overall building site and the buildings so that major improvements in the exterior wind environment were achieved. Furthermore the design brief from the municipality called for an overall climatic design, where low-energy solutions were combined with consideration of the exterior environment near the buildings.

In the EU Joule project Nat Vent one of the work packages was dealing with controlled air flow inlets. During the last conference in Greece and overview was presented on availability, performances and application of controlled air flow inlets. At the presented poster an interactive IAQ computer tool was demonstrated. This tool has been improved and is now available. Some participating countries in the Nat Vent project have carried out special tests with the NatVent IAQ tool. The NatVent participants were asked to design a natural ventilation system according to their national requirements.

Airborne particulate matter is an important form of pollution, which has generated increasing concern in recent years. As well as contributing to poor visibility and surface soiling, airborne particulate matter can have adverse effects on human health. Construction and other civil engineering sites have been perennial sources of nuisance dust (that is, dust deposited on surfaces and generating complaint). However, there is currently no formal advice or Code of Practice for regulating the emission of particles from construction activity.

A semi-empirical two-compartment constant parameter model is used to predict airborne and surface du t concentrations. The model parameters are air in- and exfiltration internal particle sources, surface deposition caused by settling. Brownian and turbulent diffusion and thermophoresis track-in of dust particle and resuspension. Model predictions are calculated for some typical scenarios, and the soiling rate of a vertical surface is calculated for a range of friction velocities and electric field strengths.

Many significant ASHRAE papers devoted to hospital ventilation have been published. In contrast, literature regarding ventilation in nursing facilities is rare. Nursing facilities are distinctly different from hospitals. This article provides some insight and guidance toward the design for such facilities.