Air purifiers are great, but there is one problem that affects many of them: noise. Many people find the sound of a traditional purifier's fan to be distracting. It may even prevent sleep if the purifier is used in a bedroom.

Fortunately, it is possible to find air purifiers that are completely silent. These machines work on a different principle than traditional filter-based devices. The methods of purification vary, but they all promise to clean the air without the need for any moving parts. The lack of motion is what allows them to function without making noise.

Ion-based Air Purifiers

Ionic air purification devices use a set of charged plates to capture dust and other contaminants from the air. As the name suggests, they also ionize the air that passes through them. These can be quite effective, but require regular cleaning to retain their effectiveness and ability to run silently. Therefore, it is important to choose a model that can be effectively maintained.

Heat-based Systems

Some silent air purification systems use heat to destroy contaminants. These are good for people who find that the ozone generated by ionic machines is irritating to their respiratory systems. These machines also have no moving parts, so they run without making any noise at all.

Although ionic and heat-based systems are totally silent, they are often not powerful enough for large rooms. The complete lack of any fan system means that air cannot be driven through them, so they must rely on the room's natural air flow to work effectively. Therefore, it is often better to choose a nearly silent machine rather than a totally silent one.

Quiet Air Purifiers

Though not totally silent, quiet air purifiers do a good job of balancing the need to clean large amounts of air with the need to be free of annoying noise levels. Like traditional purifiers, these machines use fans to force air through filters. The difference is that care has been taken to make sure that their fans operate at whisper-soft volumes. They're recommended for bedrooms, offices and any other location where the machine needs to be unobtrusive.

Since everyone has a different idea of what qualifies as quiet, it's important to check the decibel levels of any machine that makes the claim. Most quiet machines run at the volume you'd expect in a library at their lowest setting, but have higher settings that are around the volume of a normal conversation.

You should also be sure that the device is capable of cleaning the amount of air that you need it to purify. By choosing a purifier that is both powerful and quiet, you'll ensure that you are satisfied with your new device.

Peter Wendt is a writer and researcher specializing in silent air purifiers. For readers who are interested in learning more about this subject, Peter recommends they check out AmorWares.com.

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