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An EPA review of eight studies (PDF) found that purified air delivered modest improvements in at least one health area, such as allergy symptoms. In a 2018 study of about 130 households, filtration resulted in about a 30 percent reduction of coarse particles, such as dust.īut how does that affect your health? Almost a dozen studies-including those conducted in Vancouver, British Columbia Taipei, Taiwan and Somerville, Massachusetts-looked at the cardiovascular effects of air purification and showed improved cardiovascular health among participants. Multiple studies of room air purifiers show that using HEPA filters results in reductions of 50 percent or higher of particulate matter. The air purifiers that perform well in CR’s lab tests are good at filtering dust, smoke, and pollen from the air.
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(A whole-house air purifier system is tied into a home’s heating, ventilating, and air conditioning system.) And while room air purifiers help to reduce indoor pollution, there are limits to what they can do. Room air purifiers can help when those methods are insufficient or not possible.Īir purifiers are designed to filter the air in a single room, not the entire house. The best ways to improve indoor air quality are to remove the pollutant sources and ventilate with fresh, clean outdoor air. Some gases, such as radon, can cause lung cancer and death. Exposure to VOCs can cause nose, throat, and eye irritation headaches nausea and damage to the liver, kidneys, and nervous system. Volatile organic compounds (VOCs), including formaldehyde, are released into the air from adhesives, paints, and cleaning products. Studies show that long-term exposure to high particle levels may even cause bronchitis, impaired lung function, and premature death. Inhaling them has also been linked to heart attacks in people with heart disease. Breathing them in for even just a few hours is enough to aggravate lungs and trigger asthma attacks.
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(For everything you need to know about the pandemic, see CR’s Guide to the Coronavirus.)įine particles 10 micrometers in diameter or smaller, including those found in dust and smoke, are especially a concern because they can make their way deep into the lungs. These hazardous conditions are compounded by the presence of wildfires like the ones in California and the Midwest-as well as the coronavirus, if someone at home is sick with COVID-19. Pollutants-such as smoke from tobacco, burning wood, and cooking gases from cleaning products and building materials dust mites mold and pet dander-contribute to a poor indoor environment that can have ill effects on the body. But it’s possible the air inside your home is dirtier than you think.Īccording to the Environmental Protection Agency, the concentration of certain pollutants is often two to five times higher indoors than outdoors. No matter the season, clean air is important for your lungs, blood circulation, heart, and overall physical health.