Pollution and indoor air circulation
Molds and mildews release disease-causing toxins.
Microbial contaminants can be eliminated or controlled by cleaning and repairing places where water has collected or leaked, such as floors, roofs or humidifiers with stagnant water.
As the forces for air movement depend on the weather conditions, the openings in the building envelope must be controlled according to the weather as well as to pollutant and moisture generation.
Prevention and control of indoor air pollution
The design of these buildings, intended to reduce energy costs, has been identified as a major source or contributor to worker-reported health symptoms. These units exhaust stale, warm air from the house and transfer the heat in that air to fresh air being supplied from the outside. People living in this type of environment may experience adverse health effects from breathing these contaminants. Having identified office air pollution and ventilation problems, we must consider ways of resolving them. Wind influences air pressure peak values but not the average values. The key to making the workplace safe for CWA members is strong, active local safety and health committees. In part, air quality problems are created and compounded by the "sealed buildings" in which many people work. Driving in cars, flying in planes, engaging in recreational activities, and being exposed to environmental pollutants all pose varying degrees of risk. Use products containing organic solvents sparingly and according to label directions. Depending on the approach, hybrid systems extend the applicability of ventilation to a wider range of buildings, including multi-storey buildings, urban locations and shopping malls. Before monitoring your home for pollutants besides radon, consult your state or local health department or professionals who have experience in solving indoor air quality problems in nonindustrial buildings. Home test kits cannot detect small amounts of lead under some conditions. Water-damaged carpets and building materials can harbor mold and bacteria. Health Effects From Biological Contaminants Some biological contaminants trigger allergic reactions, including hypersensitivity pneumonitis, allergic rhinitis, and some types of asthma. Change the water daily and do not allow scum and scale to develop.
People living in this type of environment may experience adverse health effects from breathing these contaminants. Some homes built as recently as may also contain lead paint. Ventilation systems Ventilation systems can be classified as natural, mechanical or a mixture of the two.
Pollution and indoor air circulation
As a rule, source control is preferable to ventilation. For these reasons, occupants and management in leased space buildings will need to closely coordinate their indoor environmental management strategies. When radon becomes trapped in buildings and concentrations build up indoors, exposure to radon becomes a concern. A third way to decide whether your home may have poor indoor air quality is to look at your lifestyle and activities. Reducing Exposure to Household Chemicals Follow label instructions carefully. Also, the rate of air turnover can be adjusted. In addition, buildings originally designed for one purpose may end up being converted to use as office space. Notify your building or facility manager immediately if you suspect an indoor air quality problem. Single-sided ventilation through a small opening is driven by random turbulent fluctuations more
Keep exposure to emissions from products containing methylene chloride to a minimum. EPA's booklet, Residential Air-Cleaning Devices, provides further information on air-cleaning devices to reduce indoor air pollutants.
Inadequate ventilation can increase indoor pollutant levels by not bringing in enough outdoor air to dilute emissions from indoor sources and by not carrying indoor air pollutants out of the home. If possible, take plants and pets outside when applying pesticides to them. Keep exposure to perchloroethylene emissions from newly dry-cleaned materials to a minimum.
Measuring Pollutant Levels The federal government recommends that you measure the level of radon in your home.
The introduction of outdoor air is one important factor in promoting good air quality. Thoroughly clean and dry water-damaged carpets and building materials within 24 hours if possible or consider removal and replacement.
Apartments can have the same indoor air problems as single-family homes because many of the pollution sources, such as the interior building materials, furnishings, and household products, are similar.
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