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Since indoor air pollutants can adversely affect human health, it is important to have real-time indoor air quality assessment/monitoring system that can help not only in the improvement of indoor air quality but also help in detection of leaks, spills in a work environment and boost energy efficiency of buildings by providing real-time ...
For indoor environments such as offices or gyms where the principal source of CO 2 is human respiration, rescaling some easier-to-measure quantities such as volatile organic compound (VOC) and hydrogen gas (H 2) concentrations provides a good-enough estimator of the real CO 2 concentration for ventilation and occupancy purposes.
Demand controlled ventilation (DCV) is a feedback control method to maintain indoor air quality that automatically adjusts the ventilation rate provided to a space in response to changes in conditions such as occupant number or indoor pollutant concentration. The most common indoor pollutants monitored in DCV systems are carbon dioxide and ...
A clear understanding of both indoor and outdoor air quality parameters is needed to improve the performance of ventilation in terms of occupant health and energy. [7] In scenarios where outdoor pollution would deteriorate indoor air quality, other treatment devices such as filtration may also be necessary. [8]
Unlike low-cost monitors, which are carried from place to place, static monitors continuously sample and measure the air quality in a particular, urban location. Public places such as busy railroad stations sometimes have active air quality monitors permanently fixed alongside platforms to measure levels of nitrogen dioxide and other pollutants ...
Air: indoor air quality, smoke-free environment, adequate ventilation design, construction pollution management: 18 Water: water quality indicator, drinking water quality, water quality monitoring and legionella management: 14 Nourishment: availability and visibility of fruit and vegetable: 16 Light
It also generally requires periodic or continuous monitoring of air quality. As an example, the United States Environmental Protection Agency has developed the National Ambient Air Quality Standards (NAAQS) [6] NAAQS set attainment thresholds for sulfur dioxide, particulate matter (PM 10 and PM 2.5), carbon monoxide, ozone, nitrogen oxides NO x ...
Passive or "diffusive" air sampling depends on meteorological conditions such as wind to diffuse air pollutants to a sorbent medium. Passive samplers, such as diffusion tubes, have the advantage of typically being small, quiet, and easy to deploy, and they are particularly useful in air quality studies that determine key areas for future continuous monitoring.