Ultimate Guide to Buying an Air Purifier

Your Guide to buying the best Air purifiers


This air purifier buying guide will provide you with the information and tips you need to make a well-informed decision and purchase the best air purifier for your needs. With so many types and models on the market today, it can be difficult to choose the right unit for your home or office. This guide will help you understand the features and benefits of air purifiers, the different types available, and the factors to consider when shopping. We will also provide you with helpful tips and advice to ensure that you make the most of your purchase and get the best value for your money.

Key features

  1. Size: Consider the size of the air purifier. Depending on the size of the space you want to purify, you will need to purchase an air purifier with the corresponding capacity.
  2. HEPA Filter: Look for an air purifier that has a high-efficiency particulate air (HEPA) filter that is certified to remove 99.97% of particles larger than 0.3 microns.
  3. CADR Rating: Check the Clean Air Delivery Rate (CADR) rating of the air purifier. The higher the CADR rating, the faster it can filter air contaminants from the room.
  4. Noise Level: Pay attention to the noise level of the air purifier. Many air purifiers are quite loud, and you may want to purchase one that is quieter if you plan to use it in a bedroom or living room.
  5. Energy Efficiency: Look for an energy-efficient air purifier that won’t raise your electricity bills.
  6. Maintenance: Check how often you’ll need to replace the filters and other parts of the air purifier.
  7. Warranty: Make sure the air purifier comes with a good warranty in case it breaks or malfunctions.

See the most popular Air purifiers on Amazon

Important considerations


  • Reduces Allergens - Air purifiers help reduce allergens in the air, such as dust mites, pet dander, mold spores, and pollens.
  • Improves Air Quality - Air purifiers help filter pollutants, chemical odors, and smoke from the air, reducing air pollution and improving air quality.
  • Eliminates Odors - Air purifiers can help eliminate odors in the air, such as pet odors, smoke, cooking odors, and other household odors.
  • Reduces Asthma Symptoms - Air purifiers can help reduce the symptoms of asthma and allergies, such as coughing, sneezing, and wheezing.
  • Improves Energy Efficiency - Air purifiers help remove pollutants and other particles in the air, which can improve the efficiency of your heating and cooling systems.


  • Cost - Air purifiers can be costly, and the larger filters you need, the more expensive they will be.
  • Size - Air purifiers can be bulky and take up a lot of space.
  • Maintenance - Air purifiers need to be regularly maintained, including regularly changing the filters.
  • Noise - Air purifiers can be quite noisy, especially those with fans.
  • Odors - Some air purifiers may produce odors due to the use of certain filters.
  • Ineffectiveness - Air purifiers may be ineffective at removing certain pollutants, such as carbon monoxide or volatile organic compounds.
  • False Sense of Security - Air purifiers may give some people a false sense of security, leading them to not take other safety measures such as closing windows or using air filters.
  • Power Consumption - Air purifiers can be energy-intensive, consuming a lot of electricity.

Best alternatives

  1. HEPA Filters - Air filters consisting of a mat of randomly arranged fibres, typically used to trap particles of dust, pollen, mould and pet dander from the air.
  2. Air Cleaners - A device that removes contaminants from the air, such as dust, smoke, pet dander, and pollen.
  3. Air Purifiers - An air purifier is a device that uses a fan to draw air in and through a filter to trap particles and purify the air.
  4. UV Air Purifiers - A type of air purifier that uses ultraviolet light to kill bacteria and other pollutants in the air.
  5. Dehumidifiers - A device designed to reduce the humidity in a room by removing moisture from the air.

Related tools, supplies, and accessories

  • HEPA Filters - A type of filter that can remove up to 99.7% of airborne particles.
  • Pre-Filters - Used to capture large particles, such as dust, pet hair, and other allergens.
  • Activated Carbon Filters - Used to remove gases, odors, and help reduce smoke.
  • UV-C Light - A type of light that uses ultraviolet radiation to kill germs, bacteria, and viruses.
  • Ionizers - Used to generate negative ions that can help reduce the number of airborne particles.
  • Air Quality Monitors - Devices that measure the air quality in a room and alert you to any changes.
  • Remote Controls - Used to control the air purifier from a distance.
  • Automatic Shut-Offs - Automatically shuts off the air purifier after a certain amount of time.
  • Timer Settings - Allows you to set a timer for the air purifier to turn on or off at certain times.
  • Air Quality Sensors - Detects changes in air quality and automatically adjusts the fan speed accordingly.

Common questions

  1. What are the benefits of an air purifier? Air purifiers remove allergens, dust, smoke, pollen, pet dander, mold spores, and other airborne particles from the air, improving air quality and reducing health risks. They can also reduce odors and provide relief from asthma and allergies.
  2. What size purifier do I need? The size of purifier you need depends on the size of the room you want to purify. Generally, a small room like a bedroom or home office would require a smaller purifier, while a large living room or kitchen would need a bigger purifier.
  3. Do air purifiers use a lot of energy? Generally speaking, air purifiers are fairly energy efficient and will not cause a significant increase in your energy bill. However, it is important to look for an air purifier that is Energy Star certified for maximum efficiency.
  4. How often do I need to replace the filter? The frequency of filter replacement depends on the type of filter, the size of the room, and the amount of air purification you need. Some filters need to be replaced every few months while others can last for years.
  5. What type of filter is best? The type of filter you need depends on the type of particles you want to remove. HEPA filters are best for removing small particles like dust and other allergens, while activated carbon filters can help reduce odors, smoke, and other volatile organic compounds.


In 2011, a Chinese man named Huang was so desperate for clean air that he purchased 20 air purifiers to try and improve the air quality in his apartment. He then received a bill for over $2,000 dollars due to the additional electricity usage! This story was reported by CCTV in China and serves as a reminder to be conscious of the energy usage of your air purifier. https://www.cctv.com/program/newshour/20110808/103701.shtml

Disclaimer: This buying guide was not created by humans, and it is possible that some of it's content is inaccurate or incomplete. We do not guarantee or take any liability for the accuracy of this buying guide. Additionally, the images on this page were generated by AI and may not accurately represent the product that is being discussed. We have tried to convey useful information, but it is our subjective opinion and should not be taken as complete or factual.