Even a few years back if someone had asked us if we ever think about what we are breathing in, we would have doubted his sanity. But things have changed rapidly. And the figures which are coming out through several nationally recognized agencies are quite shocking in a way. Here are a few facts:

- The air indoor is 2 to 10 times more polluted than outdoor air
- There are about 15 million Americans suffering from asthma and the number is on the rise
- Almost 50% of all diseases are aggravated due to the polluted air we breathe

All this has certainly led many of us to get an air purifier to be installed in our house. The air purifying industry has also grown by leaps and bounds and there are a whole range of products available these days. As always, more the choices the harder it is to choose.

So before you buy your home air purifier you should actually do some homework. The very first thing you need to do is to assess your needs. Is there someone in your family who suffers from severe respiratory disorders. Then you need to install a HEPA air purifier. However, if you are installing the air purifier just as a precautionary measure and want your family to breathe in decently clean air then an ionic air purifier will serve the purpose.

Another thing you need to decide upon is the capacity of the purifier. The bigger your room is the higher capacity purifier you will require. The capacity also depends on the kind of traffic the room has and whether you keep pets or not. It is always better to have more than required capacity of air purifier installed at your place. This would not only keep the air cleaner, but also for HEPA purifiers the noise level will also be down.

The other thing you need to consider is the availability of filters. If it is not one of the reputed brands, then replacing the filter can be a big issue. You certainly would not like to travel miles just to get one filter for your air purifier. Make sure there are outlets near your home or the filter is available over the internet.

You should also clarify what are the special features of the individual purifiers and which one suits your needs more on that count. You should also make a note of the warranty being offered.