Three portable air cleaners alone or combined with ultra-violet germicidal irradiations were tested to determine their capacity to remove airborne bacteria. Results give values of airborne bacteria removal rates.
A design procedure of material and hybrid ventilation systems is described. It includes a climate suitability analysis, a loop equation design method and a detailed multizone coupled thermal-airflow analysis using CONTAM97R software.
Perceived air quality and sensory pollution loads were measured in 6 office buildings in Denmark with a panel of 43 subjets on a normal weekday and on a weekend. Results are presented and discussed.
The demand for duct cleaning has been increasing exponentially over the last few years and to determine objectively if the duct is dirty and has to be cleaned is necessary.All air-handling units from a school district (18 buildings) and representative portions of their associated ductwork were assessed. Results of dirt and contamination are compared to dirt criterias and commented.
Physico-chemical and microbiological measurements (temperature, humidity, CO2, CO, VOC, bacteria and fungi) were performed on indoor air of three schools near Paris (France). Results of measurements are given and analysed. Indoor air quality is better with mechanical ventilation than in operable windows classrooms. TVOC concentrations are much higher indoors than outdoors.
Indoor environmental measurements (temperature, CO2, formaldehyde, TVOC) were operated in 28 classrooms in Warsaw (Poland). The classrooms were equipped with natural ventilation systems. Air change rates were calculated from CO2 concentrations. Results are compared with Polish regulation and international requirements and standards. The natural ventilation systems applied in all schools do not ensure proper ventilation rate.
Four relocatable classrooms were designed, constructed and tested in Californian schools to demonstrate technologies that improve energy efficiency and indoor environmental quality. First results such as CO2 and particle concentrations are presented and discussed.
A Norwegian research project in under progress to develop a new concept for control of air movements in protection isolates, operating theatres and other risk areas in hospitals. The aim is to reduce airborne hospital infections through appropriate design of building, HVAC installation and control of air movements. A container solution was developped for isolates. Its HVAC system, and especially the ventilation system are described in details. The first container has been finished in June 2002 to be tested.
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