If you want to know how to choose an air purifier then this article will tell you everything you need to know to help you decide which one is best for you.
Why you might need an air purifier
An air purifier may alleviate your symptoms if you have asthma, hay fever or an allergy to any one of a multitude of airborne allergens such as pet dander, dust mite or mould spores. You might also consider purchasing one if you just want cleaner air in general and would like to filter out dust, traffic pollution or ever tobacco smoke.
How an air purifier works
An air purifier typically draws air in and then uses one or more of the following methods to remove contaminants:
- Carbon filtration
- Electrostatic filtration
- HEPA filtration
What you need to consider when choosing an air purifer
What do you want to remove?
Depending on the model chosen, an air purifier is capable of removing the following contaminants:
- Particles, such as pollen, pet dander, dust mite & mould spores
- Chemicals & volatile organic compounds (VOCs)
- Bacteria & viruses
How efficient do you need your air purifier to be?
The efficiency of an air purifier refers to the percentage of a particular contaminant that the air filter is capable of removing or destroying.
How big is your room?
The capacity of an air purifier broadly refers to the number of times it can ‘process’ the air in a room in a given period of time. Many manufacturers will provide a recommended room size for their air purifiers. Some manufacturers also publish a clean air delivery rate (CADR) which indicates how quickly the air purifier cleans the air (higher is better).
Running consists for an air purifier typically consist of energy consumption, filter replacement and (with some models) bulb replacement.
Many air purifiers contain a fan and so some noise is inevitable.
What features do you want?
Features that might be included in a particular model of air purifier (but not in others) include:
- Servicing indicator
- Programmable timer
- Carrying handle
- Number of speeds:
- Remote control
- Dirt sensor
- Washable pre-filter
Some models of air purifier are accredited by one or more independent organisations. It is worth noting that sometimes manufacturers have to pay for accreditation and may choose not to.
What people say
It may be worth reading what other people say about any particular make and/or model.