Info on Filterless Air Purifiers
Nearly every air purifier uses some sort of filter. This causes considerable frustration among buyers, because a number of them are extremely expensive. Some filters cost as much as the air purifier itself did originally. How do you get around this problem? You could go for a filterless air purifier - the problem, however, is that most of these aren't that effective at getting rid of dust or other things from the air. There are technologies such as uv ray based air purifiers that only kill germs - but that doesn't take anything out of the air. There are ionizers, which don't need a filter because they are only charging the particles in the air. The problem is that if they are completely without a filter, they'll just make your house dusty by causing particles to cling to everything. The real solution? Get an air purifier with a washable filter instead of a replaceable filter.
How do you know the difference? First of all, if you're dead set opposed to buying a replacement filter, then you'll need to avoid filters labeled "HEPA," because these require frequent replacements. They're better technology in general, but you have to pay for it. Second, read the packaging or the description online and see if it says anything about how to wash the filter. This is a good indication that you can just reuse it, because you'll have to clean it often. That is the downside to trying to get a filterless air purifier - you'll have to clean the inside of the machine more frequently, sometimes up to once a week. It depends on what you're trying to clean out of the air. Some things, like tobacco smoke, are really hard on the air purifier. On the other hand, your house may be relatively free of particles and you may not have to do it as much.
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