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Particle Sizes & Settling Rates
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The size of particulate matter is the dominant magnitude when determining the quality, importance and behavior of a particle. |
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The Inside Story: A Guide to Indoor Air Quality
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A Guide to Indoor Air Quality While pollutant levels from individual sources may not pose a significant health risk by themselves, most businesses and homes have more than one source that contributes to indoor air pollution. There can be a serious risk from the cumulative effects of these sources. Fortunately, there are steps that most people can take both to reduce the risk from existing sources and to prevent new problems from occurring. The attached booklet was prepared by the U.S. Environmental Protection Agency (EPA) and the U.S. Consumer Product Safety Commission (CPSC) to help you decide whether to take actions that can reduce the level of indoor air pollution in your own home. A Guide To Indoor Air Quality |
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Indoor Air Pollution - What/Where is it?
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Three Main Groups of Pollutants Particulates - like dust, pollen, tobacco smoke and dander. Less than 1% of particulate matter are visible to the naked eye. So, even if you can't see it, it's there! Biological - including bacteria, viruses, fungi and mold. Also includes animal dander (minute scales from hair, feathers or skin) and dust mite and cockroach parts. Gases and Odors - gases are released inside your home from furniture, carpets, cabinets, cleaning chemicals and hair sprays. |
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The Truth About Filters
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Be Honest With Yourself Are you going to remember to change the HEPA filters? Clean the electrostatic precipitators? We live busy lives, and if we forget to maintain our air purifier, it WILL spew even more biological pollutants into our air. |
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Health Effects of Particles
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Particle Size  When considering the health effects of particles, particle size is the key factor. Particles more than 10µm (microns) in diameter do not get as far as the lungs, as they are normally caught in the nasal cavity and the pharynx. Particles smaller than 10 microns may enter the upper respiratory tract just under the pharynx, where some of them are caught and removed (by coughing, spitting or swallowing). |
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Mold Remediation in Schools and Commercial Buildings
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Concern about indoor exposure to mold has been increasing as the public becomes aware that exposure to mold can cause a variety of health effects and symptoms, including allergic reactions.   |
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