Air Purifier: Air purifiers are best described as appliances designed to remove impurities from the surrounding air. Hygienically treated air has been scientifically proven to be of value to asthmatics and those inclined to allergies. If you are in the market for a good quality air purifier then you should find the following information invaluable in your decision making.
What are the Benefits of Air Purifiers?
Benefits vary from person to person but in particular those that are sensitive to allergens - for example dust, pet dander, pollens, mould spores, dust mite faeces and even smoke particles. A good air purifier will reduce house cleaning due to high levels of dust removal from the air. Energy use and electromagnetic radiation emissions are minimal and completely safe.
What Air Purifier Should I Choose?
Not all air purifiers will remove the same types of impurities so it is important to make sure you understand what your personal needs are. If trapping larger particles is important then you would need a HEPA filter. HEPA filters can remove 99% of 0.01 to 0.3 micro-meter particles. They are not effective for particles of 0.01 micro-meters or less. For particularly dusty rooms you should attempt using a pre-filter in front of the HEPA filter to arrest the very fine particles.
If your air particles are of 0.3 micro-meters or above the these are best removed with an HVAC at MERV 13 or greater. Volatile chemicals and pungent odours are best removed by activated carbon filters. Follow this up with a HEPA filter to arrest the smaller particles. Use photo-catalytic oxidation (PCO) - to eradicate moulds, bacteria and viruses. These are often integrated with HVAC systems.
Ionizer air purifiers operate with charged electrical surfaces to bond to air impurities. These are very effective for large size homes, however, they do emit small amounts of ozone which is environmentally unfriendly so they are much less popular. A further suggestion for larger full size houses are Ozone Generators - these are excellent for removing strong odours that are not easy to remove with other types of air filters. They generate large amounts of ozone gas and are only suitable in unoccupied properties.
What to Look for When Investing in an Air Purifier?
It's important to ensure that the air filter does not generate any unsafe gas by-products, is quiet to run, check how regularly you need to replace the filters, how much power it uses and make sure the air purifier looks attractive. Most air purifiers generate very low quantities of ozone gas and, excluding Ozone Generators, are very safe to use. Don't buy an air filter that is described as HEPA-type, HEPA-like or 99% HEPA as these are not genuine HEPA.
U S Consumer Reports unreservedly recommends air purifiers, air cleaners or air filters for indoor use - especially where there are allergy or asthma sufferers. If you are seeking further information regarding this topic then I recommend The U S Environmental Protection Agency and its Science Advisory Board publication Indoor Air Quality.
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