12 Factors To Consider When Buying Air Purifiers [Indepth Guide]

Factors to consider when buying air purifiers in 2021

Air purifiers are electronic devices that remove contaminants from the air. These devices are commonly believed as being beneficial to allergy sufferers and asthmatics, and at reducing or eliminating second-hand tobacco smoke.

There are different processes of varying effectiveness that are used to purify the air. Different processes will remove different contaminants, so there is an advantage in using more than one process in a purifier. As for buying an air purifier, there are a number of factors that you will want to take into consideration. Some of the key factors are outlined below for your convenience.

StansTips Savings For Air Purifiers [Today Deals]

Best overall air purifier:

Whirlpool AP51030K Whispure Air Purifier

Whirlpool Whispure Air Purifier, HEPA Air Cleaner,...
  • Model name AP51030K is renamed to WP500P
  • Whisper classic design
  • User friendly electronic soft touch control
  • True HEPA 0.3 micron filtration
  • Filters air 4.8 times per hour in a 500 square feet room
  • 4 Fan speeds, plus sleep and turbo modes
  • Quiet operation on all speed settings
  • Easy to use electronic controls
  • High performance in removing particles including pet dander, dust mites, pollen, ragweed, mold spores, and other microscopic irritants
  • Clean Air Delivery Rate (CEDR) 315

Best budget air purifier:

Honeywell Compact Air Purifier with Permanent HEPA Filter, HHT-011

  • Compact tabletop air purifier for rooms up to 85 square feet in size
  • Permanent HEPA-type filter
  • 3-stage filtration system first helps clean the air by using a washable pre-filter to capture large airborne particles
  • Acceptable noise level

Best air purifier for larger rooms:

Honeywell 50250-S Pure HEPA Round Air Purifier

Honeywell 50250-S True HEPA Air Purifier, 390 sq....
  • LARGE ROOM AIR PURIFIER – Help make the air in your home cleaner with the...
  • HELPS REMOVE MICROSCOPIC PARTICLES AND MORE - This HEPA air purifier has 3...
  • EFFECTIVE AIR CLEANING AND CIRCULATION –Honeywell Air Purifier for home...
  • Good for rooms up to 390 square feet in size
  • Permanent HEPA filter
  • Works effectively removing dust, pet hair, pollen, smoke, and other airborne particles 0.3 microns or larger
  • Acceptable noise level when it runs on low & medium speeds, but quite noisy on high speed
  • Intelli Check filter monitor to remind you when to replace the filter

1. How Effective Is It In Cleaning The Air?

The first thing you will want to know will be the effectiveness of the air purifier. Is it good at removing all bad smells (like pet litter, mold, etc.). How big a room can it purify?

Caution: Air cleaning is a highly confusing science. It’s hard to say what works best or is most effective. Some manufacturers may present misleading information. Therefore it isn’t so easy to determine which air cleaner is best for your specific needs.

Hint: The best thing you can do is to browse through some of the REAL users’ comments/reviews listed in the Air Purifier Department of the Amazon.com marketplace.

2. How Quiet Is It? Can It Be Used At Night Without Disturbing Your Sleep?

Most people who purchase an air purifier will want to leave it on for the night. They may purchase it for their own or their kids’ allergies and will want it to run silently while they sleep.

3. How Big A Room Can It Purify?

You will also want to know if the air purifier is able to clean the air in a specific room. The product specification list should provide this information like “this purifier can successfully clean the air in our 15×15 room”.

4. Does It Have A HEPA Filter?

HEPA filters are very effective at removing allergens and definitely sought after by most consumers.

5. Is The Filter Easy To Clean?

Cleaning the filter is the only maintenance an air purifier will require. If the filter is easy to remove and clean, that will be a good plus. In addition, some newer models allow users to simply vacuum the filter without even touching it.

Save NowBestseller No. 1
LEVOIT Air Purifier for Home Allergies Pets Hair...
  • Ozone Free: Levoit air purifiers avoid using UV-C light, an air cleaning...
  • High Performance: Enjoy fresh air in 12 minutes with the Core 300 True HEPA...
  • Find Relief: Ease sneezing, congestion, and other allergy symptoms caused...
Save NowBestseller No. 2
Germ Guardian True HEPA Filter Air Purifier with...
  • 4 IN 1 AIR PURIFIER FOR HOME True HEPA air filter reduces up to 99.97% of...
  • KILLS GERMS UV C light helps kill airborne viruses such as influenza,...
  • TRAPS ALLERGENS Pre filter traps dust, pet hair, and other large particles...
Bestseller No. 3
Sans HEPA 13 Air Purifier - 780ft² ultra-quiet...
  • HEPA 13 AIR PURIFICATION - Great for large spaces, homes, offices, and...
  • AUTO MODE AIR QUALITY - Auto mode constantly monitors the air quality and...
  • PRE-FILTER - Three-stage filter with pre-filter, HEPA 13 and Activated...
Save NowBestseller No. 4
Coway AP-1512HH Mighty Air Purifier with True HEPA...
  • Coway Mighty (AP-1512HH) is designed to accommodate room sizes up to 361...
  • 4 Stage Filtration System (Pre-filter, Deodorization filter, True HEPA...
  • Pre-filter is washable and permanent, designed to catch larger dust...
Bestseller No. 5
LEVOIT Air Purifier for Home Large Room, H13 True...
  • 100% Ozone-Free: The Vital 100 is completely ozone free and never uses UV-C...
  • Powerful Performance: With a CADR of 130 CFM / 221 m3/h, the Vital 100 is...
  • 3-Stage Filtration: Comes equipped with a washable pre-filter for large...

6. How Frequently Should Users Change The Filter?

Most air purifiers have filters that should be replaced with a new one at specific intervals. This is the maintenance cost of the product and of course the lower the frequency, the better it is for consumers. For instance, an air purifier that costs more than other, similar models may have a filter that lasts much more than the others. In that case, that model will provide a cost advantage in the long run. Plus, some new models have permanent filters that do not need replacing, and that is a huge bonus.

7. Is It Effective At Low Speeds?

Some manufacturers say that their air purifier is extremely quiet, but forget to mention that the quietness is there only at the minimum settings and that you may need to run the purifier at high speeds to get the best results!

8. Is There A Filter Replacement Indicator?

Some higher-priced air purifier models come with a filter replacement indicator that lights up to warn the user that they need to replace the filter. This is a useful feature to have that does take the guess work out.

9. Are There Dust Sensors And Air Quality Monitors In The Model?

Some models have dust sensors and air quality monitors that automate the cleaning process. The purifier measures the dust and pollutant levels and goes on/off or speeds up/slows down depending on the amount of pollutants. This, of course, is a very handy feature to have and will be seen as a high value feature.

10. Does It Have Ionizer Or Ozone Generator Features?

Certain air purifiers have ionizer and/or ozone generator features that are considered more effective in cleaning the air. However, ionizers and ozone generators produce ozone gas which can be detrimental for people with pulmonary problems. Ionizers produce less ozone gas, so they are considered better in this sense.

11. Is The Air Purifier Compact? Are Controls Easy To Use?

People don’t want to haul gigantic appliances around their homes, so it’s better to have a small, compact and lightweight air purifier that can fit any space (like on a desk or a bookshelf). Plus, the less complicated the controls are, the better it is for the users.

Save NowBestseller No. 1
LEVOIT Air Purifier for Home Allergies Pets Hair...
  • Ozone Free: Levoit air purifiers avoid using UV-C light, an air cleaning...
  • High Performance: Enjoy fresh air in 12 minutes with the Core 300 True HEPA...
  • Find Relief: Ease sneezing, congestion, and other allergy symptoms caused...
Save NowBestseller No. 2
Germ Guardian True HEPA Filter Air Purifier with...
  • 4 IN 1 AIR PURIFIER FOR HOME True HEPA air filter reduces up to 99.97% of...
  • KILLS GERMS UV C light helps kill airborne viruses such as influenza,...
  • TRAPS ALLERGENS Pre filter traps dust, pet hair, and other large particles...
Save NowBestseller No. 3
LEVOIT Air Purifiers for Home, Smart WiFi Alexa...
3,672 Reviews
LEVOIT Air Purifiers for Home, Smart WiFi Alexa...
  • Pure Air, Affordable Price: Our most popular air purifier series is back...
  • Genuine Replacement Filters: For the best performance and longest lifespan,...
  • Effective Purification: The compact frame and 360° design help the Core...
Save NowBestseller No. 4
Instant Air Purifier, Helps remove 99.9% of...
  • WORKS TO REMOVE VIRUSES (COVID-19): Our air purifiers have been proven to...
  • REMOVES ALLERGENS AND SMOKE: Advanced 3-in-1 filtration captures 99.97% of...
  • ADVANCED AIR CLEANING TECHNOLOGY: 3-in-1 filtration (HEPA-13, Activated...
Bestseller No. 5
Xiaomi Mi Air Purifier for Home Large Room,True...
  • 【Advanced 3 Stages Filtration System】Mi Air Purifier 3C comes with a...
  • 【High-Efficiency Air Purifier】The Mi Air Purifier 3C uses a High...
  • 【Digital LED Display】The upgraded digital LED display shows precise...

12. Is There Any New Technology Deployed In The Unit?

Sometimes you will see air purifiers that have new and innovative features that other models don’t have (like the new permanent filters deployed in certain models). If that is the case, try to evaluate the benefits of such new technologies to see if it really offers value, since you’ll most probably be paying a lot more money for it.

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