How much noise does it make?

All Air purifiers make noise at some level or the other. It now depends upon your tolerance for the noise level for some think of it as a racket though some look at it as background sound. There are solutions though; you can opt for an air purifier that has multiple setting so that you can turn it down from high to low if the sound is too loud. Some even have timers that allow you to set it so that it is higher and noisier when you are away and becomes softer when you get back.

Does it have ozone?

This is a much debated topic as some manufacturers believe that it is the best way to kill germs and bacteria. However EPA has recommended that you don t use ozone generators as they can be dangerous and harmful. A concentrated level of ozone is said to be dangerous even if it is used correctly.

How many air purifiers do you need?

This is not a strange question as one air purifier does not cover an entire house and getting a large purifier is an expensive proposition. It is better that you get more than one air purifiers for the various rooms in your house so that you get the best results. This also works out to be less expensive. Also the reason for which you are getting the filter is important as if you require it only for someone who smokes then you will only require one air purifier to installed in the room where the smoking takes place. Speak with your manufacturer they will advise you correctly.

What are the various Purifying techniques?

Your requirement will decide which type of cleaning technique you will require. There are many techniques like:

- HEPA
- Filters
- Ultraviolet Germicidal Irradiation
- Ozone Generators
- Ionisers
- Liquid Ionisers

What brand do I get?

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