Indoor air has many pollutants compared to outdoor air. These pollutants including micro-organisms, air-borne particles as well as kitchen odors and gases within the indoor air may cause or worsen diseases and ailments like asthma and allergies. While an air filter removes dirt particles, you need an air purifier to remove bacteria, pet dander, aerosols, and molds among others. When shopping around for purifiers, consider the following factors.

Consider your Needs

If you suffer from allergies, be sure to consider a high efficiency particulate purifier as it has 99.97 percent elimination rate of allergens like mold spores and pollen. Individuals who are sensitive to chemicals may opt for multiple chemicals sensitivity purifiers as it can filter all kinds of chemical odors. On the other hand, consider asthma purifiers if you suffer from asthma. It works the same way as HEPA purifiers in addition to chemical and odor filtration features. Alternatively, choose an all-purpose purifier for quality air and healthy living.


Having known your needs, you need to select the right size of your air purifier. If you are asthmatic or allergic, you want a purifier that can attain 4 air changes per hour. To find it, calculate the size of the room to purify in square feet and match it with the right purifier or use the CFM rate in order to find the target square feet to reach 4 ACH. Having the right size is a sure way to reduce the allergens and asthma triggers.

Placement of the Purifier

Purifiers for home air come in whole house or portable designs. If you are going to purify one room, consider a portable one while also considering the ones with caster wheels for easy movement, and other features for easy mobility. Due to its limited use, you may consider the whole house purifier for all rooms. As an important factor, be sure to check that it can be connected with the existing HVAC system.