Environ Sci Technol. 2015 Aug 18;49(16):9592-9. Epub 2015 Aug 6.Lee WC1, Catalano PJ2, Yoo JY, Park CJ, Koutrakis P1.Author information1†Department of Environmental Health, Harvard T.H. Chan School of Public Health, 401 Park Drive, Landmark Center West, Boston, Massachusetts 02215, United States.2‡Department of Biostatistics and Computational Biology, Dana-Farber Cancer Institute and Department of Biostatistics, Harvard T.H. Chan School of Public Health, 44 Binney Street, Dana-Farber Cancer Institute CLSB 11015, Boston, Massachusetts 02115, United States.AbstractWe validated the use of the mass balance model to determine the effectiveness of portable air purifiers in removing ultrafine (<0.10 μm) and submicrometer particles (0.10-0.53 μm) in an apartment. We evaluated two identical portable air purifiers, equipped with high efficiency particulate air filters, for their performance under three different air flow settings and three target air exchange rates: 0.60, 0.90, and 1.20 h(-1).

We subsequently used a mixed effects model to estimate the slope between the measured and modeled effectiveness by particle size. Our study showed that effectiveness was highly particle size-dependent. For example, at the lowest target air exchange rate, it ranged from 0.33 to 0.56, 0.51 to 0.75, and 0.60 to 0.81 for the three air purifier flow settings, respectively. Our findings suggested that filtration was the dominant removal mechanism for submicrometer particles, whereas deposition could play a more important role in ultrafine particle removal. We found reasonable agreement between measured and modeled effectiveness with size-resolved slopes ranging from 1.11 ± 0.06 to 1.25 ± 0.07 (mean ± SE), except for particles <35 nm. Our study design can be applied to investigate the performances of other portable air purifiers as well as the influences of various parameters on effectiveness in different residential settings.PMID: 26207386 DOI: 10.1021/acs.est.5b03126 [PubMed - indexed for MEDLINE] Publication TypesResearch Support, Non-U.S. Gov'tValidation StudiesMeSH TermsAir Filters*Air Pollution, Indoor/prevention & control*Equipment DesignFiltration/instrumentationFiltration/methodsHousing*Models, Theoretical*Particle SizeFull Text SourcesAmerican Chemical SocietyMedicalIndoor Air Pollution - MedlinePlus Health Information

What types of air conditioners are best for small apartments? Both portable air conditioners and window units can do a good job of cooling a small apartment, but Consumer Search recommends portables because they can be moved easily from one room to another to provide cooling as needed. Portables typically cost $300 to $500, as of 2015. What are the different types of air conditioning units? What are the types of air conditioners? Portable air conditioners come in small and large sizes. best spray carpet spot cleanerThe small ones deliver less than 10,000 British thermal units of cooling power and are suitable for cooling areas up to about 325 square feet, while the large ones can cool 400 square feet or more. best air purifier smokerThe size needed depends on the room's size and how much sun it receives. air grain cleaner

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What function does the blower motor have in a furnace? What causes air bubbles in paint? Where are pellets for pellet stoves sold? What can a Pneumatech air dryer do?One of the most common reasons people shy away from woodworking is that they think they need a huge garage or workspace. But you can successfully set up a small hobbyist woodworking shop in any space, even in an apartment. A compact wood shop just takes a little planning and preparation.First, as most eager but hesitant potential hobbyists realize, you have to be much more thoughtful about tool selection. A 14-inch band saw? In a small space, you're going to have to rely on bench-top or handheld tools. (It is possible to forgo power tools entirely in favor of hand tools, but that's a discussion better left for another time.)Then there are material considerations, such as how to bring full-size sheets of plywood home to cut down to size (you don't). And safety and cleanup are two more concerns: Proper ventilation and dust collection, a cinch in a larger shop, can be quite a challenge (and a potential health hazard).

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It also signals that it’s time to open a window and put on the fan! But if the fan isn’t getting rid of the fumes fast enough and you’re starting to get a headache, try absorbing the fumes instead of swirling them around the room. Get Rid of the Paint Smell Naturally Salt, lemon and vinegar all have the power to soak up paint smells pretty quickly. And because you’re absorbing the chemicals instead of pushing them around with a fan, they won’t linger in your air ducts or spread to other parts of the house. Absorb paint fumes quickly Grab some bowls and fill them halfway with water. Add a few slices of lemon and/or a quarter cup of salt to each bowl. Or instead of lemon & salt, fill a few bowls halfway with vinegar. Place the bowls around the room and let them sit overnight or until the paint smell is gone. Rinse the salt water or vinegar down the sink and discard lemons in the trash or compost. Do not eat or drink them. Properly ventilate the room

The lemon & salt solution (or the vinegar) should work fairly quickly on its own, but you can add some fans if you choose. Be sure to cover the room’s vents, so the paint fumes don’t circulate into other parts of the house. Face the fan toward an open window to direct the fumes outside. Leave the room and close the door behind you. Run the fans all day from the time you begin painting until 2 to 3 days after you’re done. This salt-lemon-vinegar trick also works to absorb other chemicals such paint thinner, chemical spray deodorizers and that (also toxic) new rug, new furniture and new car smell. Since the salt, water, lemon slices and vinegar will absorb the odor-causing bacteria, they should not be used in food or drink afterward. You can avoid toxic fumes altogether by choosing natural paints made from plants, clay, minerals or milk. Never apply a new coat of latex or oil paint before the last coat has fully dried. Damp coats of paint or primer become trapped under the dry coat and can slowly offgas chemicals into the room for several years.