To ensure good indoor air quality in buildings, filters are installed in the ventilation ducts. These filters cause a pressure drop in the ducts, so that increased power to the ventilation fans is required to maintain the flow of fresh air. To reduce this problem, the Norwegian company, Interfil, developed a new energy efficient filter in 1995. This filter has been carefully tested in recent years. The test results show that, compared to ordinary filters, the new filters could reduce fan power by about 10%, while maintaining indoor air quality.
Nightsky, an innovative night roof spray storage cooling system, provides chilled water to in-slab tubing and fan coils. Passive cooling delivery from the slab cools the building in parallel with the 'active' chilled-water fan coils. Delivering a significant fraction of the building's cooling requirements via the floor slab allows that size of the forced-air delivery system to be reduced. NightSky is most appropriate for large, low-rise buildings that have low-slope roof areas.
States that car park ventilation systems not only have to control the exhaust gases emitted by vehicles but take into account possible fuel spillages and the venting of smoke in the event of a fire. Explores ways of checking for compliance.
The need for control of cobalt from saw filing has been demonstrated by health studies in Finland, Washington state and British Columbia. I am most familiar with the study done in BC, because that is where I live and work. That study was done by a team led by Drs. Susan Kennedy and Kay Teschke, of the University of BC. They observed work activity and measured filers lung function in 8 sawmills, from June to December 1991. They found a high incidence of significantly below normal lung function. Their report was widely and effectively communicated to the sawmill industry.
New laboratory test methods using different dusts have been developed for measuring and classifying air filters but could give very misleading results compared with filter behavior in an installation. The paper describes the differences between laboratory tests and performances in atmospheric air. It provides a basis for a better understanding of air filters and filter testing to meet IAQ problems and to reflect a filters' behavior "in service".
Standards dealing with Industrial Air Technology (IA T) are very fragmented, and a real need exists for new standards this very important field. These are required to facilitate trade and communication in this important area. Clarification of the requirements for these proposed standards is necessary before any new technical committee (TC) can be established, or before new work could be allocated to any existing TC. Since 1996, there has been little discussion about new activities, a few work items on related subjects have however commenced under existing Technical Committees.
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