When the thought of buying a new air purifier popped up in your brain you might have thought it is fairly easy to get a good air purifier that will fit your requirements. But when you started looking through the catalogue you realized with all the different types of air purifier available in the market with different state of the art features, it is quite hard to choose. Air purifiers, these days, are available in several shapes and sizes depending on the users need. So you can read this article for choosing the top air purifiers that will suit your needs.
For your convenience we have divided this article into short sections, which focus on some of the basic yet important features of a typical air purifier. This will make your hunt for an air purifier much easier.
The Most Important – Air Filter
Everyone knows that the main task of an air purifier is to filter the air of any kind of pollutants. So the filter of an air purifier is inevitably the most important part of it. There are many different kinds of filters available in the market. They are as follows;
1. UV Filter
2. Ion Generators
3. Electrostatic Filter
4. Hybrid Filter
5. Mechanical Filter
The UV filters use UV ray to filter the air, which is only capable of destroying the DNA of living organisms such as fungus and bacteria as well as the RNA or DNA of a virus. However they cant make the air free of dust particles and pollen. Whereas ion generators generate negatively charged ions which attracts positively charged ions, trapping them efficiently. Both the UV filter and ion generator are used along with other types of filter to completely purify the air. In electrostatic filters the filter charges up the incoming air with positive charge which makes the pollutants present in the air positively charged. The filter is equipped with a collection section which consists of negatively charged metal plates, trapping the positively charged particles from the last section. These kinds of filters are very effective and prove to be useful in the long run, as they can last longer and can trap particles as small as 0.1 microns. But the most famous of it all is the mechanical HEPA filter which uses randomly organized glass fibres to trap pollutant particles such as pollens, dust particles, dust mites, pet dander, mold spores, and even bacteria and viruses. But surprisingly HEPA filters can only trap particles bigger than 3 microns. A HEPA true filter can efficiently purify the air of pollutants as much as 99.97%. Both the electrostatic and HEPA filters are used alongside another filter, usually termed as pre-filter. The pre-filters are in place to extend the lifespan of the main filter, or in some cases like in activated charcoal pre-filters it efficiently removes any kind of odours, fume and smoke. So always look for an air purifier that comes with a pre-filter, it doesnt matter whether it is washable or have to be replaced, pre-filters should be included and are included in any top air purifiers.
The ACH and CADR
ACH stands for Air Change Rate per Hour and it means the amount of time an air purifier will be able to completely change the air in a room during a period of one hour. Usually all top air purifiers have an ACH of 5 or higher. The CADR stands for Clean Air Delivery Rate. It is a standard developed by AHAM (Association of Home Appliances Manufacturers) which determines the rate at which an air purifier is able to intake polluted air and output clean air. It consists of three rankings which together shows how efficient the air purifier is. In this case the higher the number, the better the air purifying property is of the air purifier. If you have a relatively large room then always look for an air purifier with a high CADR as the air of the large room needs to be cleaned continuously.
Apart from the most important features discussed above, while buying an air purifier you should consider the target room size. If your room is very big then always look for an air purifier with higher ACH and CADR, and vice versa. One other thing to consider is whether the air purifier comes with an electronic filter checker. Most of the top air purifiers usually have intelligent electronic filter checkers which constantly checks whether the main filter needs cleaning or even needs to be replaced. So this frees you from all guess works you might need to do before buying a new filter for your air purifier. But if you are a person generally good with numbers then you can get yourself an air purifier without any electronic filter checkers, and remember to change filter every 3-5 years and if its washable or cleanable then washing or vacuuming it frequently.
So there it is, my definitive guide to buy an air purifier. I hope it will be prove to be useful.