2. Ionic air purifier: This type of purifier uses the effect of ionization to reduce contaminated particles and dust particles from air. It ionizes contaminants as positively charged particles which are then attracted to a negatively charged plate to get rid of the pollutants or contaminants. They are especially useful for people with allergies and asthma problems. It also helps in getting rid of odors such as pet and cigarette odors. Many ionic purifiers have adjustable power levels to allow the user to adjust it according to room size. Generally, an ionic air purifier that weighs 10 pounds and has dimensions of 9 by 10.5 by 29 inches can cover an area of 500 square feet. Nowdays you can also find many ionic purifiers that don't include a filter.

3. Eden pure air purifiers: This type of purifier not only eliminates contaminants from the air but from surfaces as well. Many air contaminants are due to surfaces such as carpets, furniture, floor etc which causes respiratory problems. It also comes with a fan as well as a pre-filter mesh which instead of replacement requires washing with water.

4. Room air purifiers: One of the most commonly used, this type of purifier, designed for a small sized room, gets rid of odors such as pet's and smoking. This unit sucks in contaminated air, cleans it and sends filtered air back into the room. This unit is portable as well.

5. Ozone air purifiers: Strictly to be used in unoccupied rooms, this air purifier produces an oxidant ozone which get rid of many contaminants namely bacteria, germs, virus, formaldehyde, odors etc. Although an effective unit ozone has its own disadvantages and can be harmful to human body.

There are many benefits of using an air purifier: (A) It purifies air and removes contaminated particles making the air you breathe healthier. (B) It gets rid of many odors.  (C) It comes in a variety of styles and capacities so you can easily find one that is within your budget. (D) Due to the healthy, purified air you will be ill less often.