States that failures in electronic equipment can be caused by volatile organic compounds. Detailed observations from a three year study of VOCs at a telephone switching office in Neenah, Wisconsin, USA are presented and data are included on matched indoor and outdoor VOC measurements, and corresponding data on HVAC fan operation and ventilation rates. The small number of occupants in the office enabled the study to assess factors influencing VOC levels without complications of human behaviour.
This study explored the possible connections between the incidence and prevalence of sick building syndrome (SBS), indoor exposures, and personal factors. This was accomplished by a four year longitudinal study of workers in six primary schools. The mean concentration of Carbon Dioxide exceeded the recommended value of 0.08 microlitres/l (800 ppm) in all schools, which suggested a poor outdoor air supply. Indoor levels of volatile hydrocarbon (VOC) was increased at high room temperatures.
Among significant occupational health problems are building-related health complaints and symptoms. A potential cause has been identified as the elevated concentrations of various types of indoor contaminants, which are frequently associated with inadequate ventilation. This research aimed to model and evaluate the performance of several ventilation methods on volatile organic compound (VOC) removal in indoor environments. The time history of the contaminant concentrations in a model office have been simulated using a newly developed computer model.
Mycological investigations were performed on a modern multistorey office building in the southeastern coastal US. Extensive colonization was found in the air handling units and fibreglass duct liner of the HVAC system. Concentrations in air samples were low however. Removal of colonized insulation material reduced indoor air quality complaints.
Indoor air quality (IAQ) in buildings can significantly affect people's health, comfort, satisfaction and productivity. Using VOC as an example, this paper outlines the methods and applications of three IAQ control strategies: source control, ventilation and air purification. It is recommended that all three IAQ control strategies be considered in order to achieve acceptable IAQ in buildings in a cost effective and energy efficient manner.
Concentrations of 54 volatile organic compounds (VOCs) and ventilation rates were measured in four new manufactured houses over 2-9.5 months following installation and in seven new site-built houses 1-2 months after completion. The houses were in four projects located in hot-humid and mixed-humid climates. They were finished and operational, but unoccupied. Ventilation rates ranged from 0.14-0.78 h-1. Several of the sitebuilt houses had ventilation rates below the ASHRAE recommended value.
Improvement in contamination control for a LCD color filter coater was studied by using a mini-environmental design. Different operating conditions of the door and the exhaust of the mini-environment were studied. Measurements of particle concentration flow field, and VOC concentration were performed. Both the particle contamination to the coating process and the VOC contamination to the outside cleanroom environment were considered in this study. lt was found that a minienvironment could be designed to significantly reduce the particle concentration.
This study is part of an investigation of the decontamination capabilities of indoor plants.Three internationally used species, Howea forsteriana Becc. (Kentia Palm), Dracaenaderemensis Eng. Janet Craig, and Spathiphyllum Petite (Peace Lily), were evaluated for theability to reduce or remove benzene and n-hexane from indoor air. Plants tested in bothpotting media and hydroponic conditions removed the individual VOCs at concentrationsequal to 2 and 5 times the maximum occupational exposure levels recommended by theWorksafe Australia Time-weighted average exposure standard (TWA), [1].
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