The Conserval Perforated Plate Solarwall is a metal solar collector designed to provide preheated ventilation (make-up) air for buildings. The system is intended primarily for industrial applications, but also has potential for commercial and multiresidential buildings with large south-facing walls. In 1991, a 420 m2 Solarwall was erected at the General Motors of Canada Battery Plant in Oshawa, Ontario. This installation reduced energy costs in several ways: by capturing solar energy, by reducing heat loss through the south-facing wall of the building, and by destratifying indoor air.

The Sapporo Factory is a large-scale commercial building complex in the heart of snowy Hokkaido. The complex has a large barrel-roof glass atrium with a comfortable indoor environment, which is maintained by making the most of cool outdoor air in summer and sunshine in winter. The atrium also provides a bright indoor space, which is never covered with snow, even in winter. Any snow falling on the glass roof is removed using the natural characteristics of snowfall.

Approximately one-third of the primary energy resources are consumed in space heating, cooling, and air-conditioning with a very low exergetic efficiency. The depleting nature of primary energy resources, negative environmental impact of fossil fuels and low exergetic efficiencies obtained in conventional space heating and cooling are the main incentives for developing alternative heating. ventilating, and air-conditioning (HV AC) techniques which can employ low density and inte1rupted energy sources.

What has heat recovery done for the cause or energy efficiency? If some manufacturers or heat recovery equipment are to be believed, the savings in ventilation costs are "quite staggering".

To ensure prompt response by real-time air monitors to an accidental release of toxic aerosols in a workplace, safety professionals should understand airflow patterns. This understanding can be achieved with validated computational fluid dynamics (CFO) computer simulations, or with experimental techniques, such as measurements with smoke, neutrally buoyant markers, trace gases, or trace aerosol particles. As a supplementary technique to quantify airflows, the use of a state-of the art, three-dimensional sonic anemometer was explored.

When a person is located in a contaminant field with significant gradients the contaminant field will be modified locally due to the entrainment and transport of contaminated air in the human boundary layer as well as due to the effect of the person acting as an obstacle to the flow field, etc. In this paper personal exposure measurements are performed by means of the Breathing Thermal Manikin. Contaminant concentration is measured in a number of locations in the breathing zone and in the inhaled air.

     Nothing highlights construction shortcomings like severe winter storms. Too often, possible problems are neglected during the construction season when winter and its bad weather seem far removed. The winter of 1999 produced many ice dams on shingle roofs in central and eastern Canada. The resulting leaks caused widespread damage to ceilings, walls and interior .furnishings of many homes.