Research Hepa Air Purifier Buying Guide


  • Exactly What Are Air Purifiers?
  • How Come You Want An Air Purifier?
  • Cost Considerations
  • Choosing the Right Size Air Cleaner
  • What type of Features Do You Really Need?
  • How About Noise Level?
  • Maintenance

Based on research conducted by the U.S. Environmental Protection Agency’s (EPA) Office of Air and Radiation, our air quality indoors can be a surprising 2 to 5 times more polluted than the atmosphere outside. This is often caused by multiple factors including:

  1. Poor ventilation
  2. Indoor pollutant sources like combustion by-products, pesticide sprays, air fresheners, cleaning products, and building material emissions
  3. Allergens and other impurities that migrate indoors and into the home’s air

The EPA recommends using an air purifier to create healthier air by filtering out allergens, odors, along with other impurities from your own space. However with the number of air purifiers in the marketplace, finding out which model is best for you personally may end up being a challenge. The following guide will allow you to select the right air purifier to your requirements.

Exactly What Are Electronic Home Air Cleaners?

  • Electronic home air cleaners work in an amount of ways.
  • Electronic home air cleaners with filters are the most common. During operation, these models pull air in the machine and pass it through a series of fabric filters and/or absorbent carbon filters utilizing the power of a circulating fan. As air moves through each filter, airborne particles and pollutants are filtered out and locked away when you look at the filter. Clean air will be circulated back into your space. This process continues so long as you keep the atmosphere purifier turned on. Filter home air cleaners are popular choices if you are to locate HEPA-level filtration (High Efficiency Particulate Air filtration) in your indoor environment—a must when you yourself have allergies. Read more about HEPA filters in our All About Air Purifier Filters article.
  • Ultraviolet or UV electronic home air cleaners use ultraviolet (UV) germicidal light to kill allergens and germs on contact as air passes through the unit. With these models, UV light is usually used alongside another type of filtration like filters for the absolute most effectiveness.
  • UV electronic home air cleaners are believed completely safe because ultraviolet light is only used in the unit and won’t escape to harm your skin or eyes. However, recent research has shown why these units may not be as effective as some manufacturers claim. UV light needs a particular timeframe – a few minutes at the least – to kill allergens and germs. Because air so rapidly passes through a UV air cleanser, the light shines limited to a matter of seconds with every pass. This is usually not adequate to neutralize all allergens and germs. With your odds, we think you need to only rely on UV light as a supplemental kind of air filtration. In other words, seek out an air purifier that uses filters, as an example, as the primary filtration system and UV light filtration as a plus feature.
  • Air sterilizers are relatively new forms of air cleaners which use heat to disinfect air as it passes through each unit. This procedure has been proven to kill at the least 99% of airborne germs, bacteria, and allergens. Air is gone back to room temperature before it is released back to your space.

How Come You Will Need An Air Purifier?

As you shop for an air cleanser, it’s a wise decision to consider the difficulty you are attempting to solve. Think about your symptoms. Are you currently coping with allergies? Asthma flare-ups? Maybe you’re irritated by certain allergens or fumes in the air. Let your need guide your decision. Below are a few example conditions and airborne pollutants you could target.
Seasonal Allergies

  • seasonal allergiesAllergy air purifiers are great solutions for helping relieve spring, fall, or year-round allergies, including allergies to pollen and dust. Models that feature HEPA filter technology trap nearly 100% of allergens smaller than the human eye can easily see (those that aggravate your symptoms the absolute most). With one of these irritants from the air, your incidences of itchy eyes, sneezing, coughing, and runny nose will likely to be reduced and your indoor air is supposed to be healthier day after day. Find out about how air purifiers could be used to treat your allergy symptoms in our article Air Purifiers and Allergies


  • Home air cleaners will also help reduce asthma flare-ups. HEPA home air cleaners are superb for removing asthma triggers, and this can be the same microscopic allergens that trigger your allergy symptoms. Alongside this, you might consider using an air purifier with odor-absorbent filtration to remove triggers like perfumes, household chemical odors, and smoke. These types of indoor pollutants can exacerbate asthma symptoms and result in an asthma attack. Read our articles working with Asthma and kids and Asthma to learn more about using an air purifier in your asthma treatment strategy.

Pet Allergies

  • pet allergiesIf you have got a pet or multiple pets and you or someone at home is allergic for them, an air cleaner might help. Many people are not allergic to cat and dog fur. They’re allergic to the dander of dogs and cats. Pet dander particles will be the skin cells that cats and dogs shed. Dander is tiny and will remain in the atmosphere for many years. These particles also have a tendency to go where your dog goes and stick around after your furry friend has left the area. Home air cleaners clean these particles through the air, trapping the dander in the filters or on electrostatic plates. These models also make it possible to lower the quantity of pet fur floating through your air, which keeps your house cleaner. Air purifier odor filters add another level of protection too. Activated carbon odor filters absorb pet odors and promote fresh-smelling, healthy air throughout your home.

Multiple Chemical Sensitivities

  • Multiple chemical sensitivity (MCS) is a condition in which an individual is sensitive to a single chemical fume or multiple chemical fumes they may encounter within their environment. These might include odors from perfumes/colognes, air fresheners, or certain cleaning products. Triggers might additionally be fumes off-gassed from materials found in newly constructed homes, new carpeting or hard flooring, and on occasion even new furniture. Not in the home, you might encounter MCS triggers in salons, manufacturing areas, hospitals, or any other places where chemicals are employed regularly.
  • Air purifiers that have extensive odor filtration system aided by the key ingredient of activated carbon would be best for helping treat an MCS condition. These models have either cloth or pelletized activated carbon filters that will measure when you look at the pounds. They’re also constructed with materials built to be free of off-gassing chemicals like certain glues, solvents, and plastic housing components, so that the actual unit will likely not play a role in your symptoms. To learn more about MCS and exactly how electronic home air cleaners might help, read our article Living with Multiple Chemical Sensitivities.

Dust Mites

  • Dust mites are tiny cream-colored organisms that live off organic material such as for example dead skin flakes or dust. Our homes would be the perfect environment for dust mites by which to live and breed. Due to their tiny size (about 0.03 to 35 microns in length) and quick crawling dust mitescapability, these little organisms move easily through the atmosphere regarding the slightest of air currents like those created while you are changing your sheets, sweeping floors, opening curtains, or dusting furniture. Dust mites can cause respiratory problems and aggravate your allergic reactions. Home air cleaners help eliminate these little parasites by pulling them out of the air and trapping them in the filter, and leaving behind clean healthy air. Find out more about how exactly to fight dust mite allergens in our article Dust Mites and Allergies.


  • Smoke from your fireplace, stove, cigarettes, and on occasion even a wildfire near your property could cause a quantity of quality of air issues in your indoor environment. Some individuals may not like the smell yet others can experience heightened allergy and asthma symptoms because of this. Smoke home air cleaners remove smoke particles and absorb fumes using a combination of HEPA and activated carbon filtration. You’re left with cleaner, fresher-smelling air that won’t trigger your symptoms.

Airborne Bacteria and Viruses

  • Certain forms of home air cleaners can also combat illness-causing airborne bacteria and viruses, creating an even healthier environment during flu season or any time of the year. Ultraviolet air purifiers use UV germicidal light to kill airborne pathogens on contact while filtering the atmosphere. Other home air cleaners might use filters coated with a special antibacterial coating to kill airborne germs as air passes through the filter. Whilst still being, air sterilizers use disinfecting heat to kill harmful germs and microbes. Research varies on the effectiveness of those models, so make sure to do your homework. To learn more about using an air purifier to battle germs and viruses, read our article Germicidal Air Purifiers May Boost Your Health.

Enhancing your Indoor Quality Of Air in General

  • Home air cleaners aren’t just ideal solutions for those who have allergies or sensitivity to a particular pollutant. They may be easily one of the better methods for you to improve your indoor quality of air and create a healthier living space for you personally and your family. Use an air purifier in your bedroom or in the area you may spend the essential time in. Daily air filtration helps remove potentially harmful impurities from your air, whether or not the pollutants are introduced during cleaning, brought in through the outdoors, or simply stirred up with day-to-day life. There are additionally many varieties of home air cleaners to pick from, from tower units and tabletop home air cleaners to models that hold on a wall and ones that lay on the ground. With a little shopping, you will no doubt find a model that is effective and in addition looks great in your space. Plus, these appliances are naturally efficient and consume minimal energy. Nearly all of today’s air cleaners also qualify under the Energy Star program.

Cost Considerations

  • The buying price of an air cleanser can vary from under $100 to a lot more than $1,000. Although these systems generally operate in the same way—air is pulled inside the filtration system, cleaned, after which released back out into your space—the logistics of how this will be accomplished, the inner design of the air purifier, plus the quality and amount of clean air exiting the device varies with every model. As you shop, take into account that air purifiers with additional advanced filtration systems, models which cover larger spaces, and ones that are packed with high-tech features have a tendency to cost a lot more than others.
  • As a rule of thumb, let your specific significance of an air cleanser guide your option in model and then determine your financial allowance. You will discover many options in multiple selling prices, from excellent budget home air cleaners to best-in-class units.

Deciding on the best Size Air Cleaner

Naturally, after considering your requirements and budget, you need to think about the size of air cleanser that will do the job.
Choosing Size Centered On Square Footage and Air Changes Per Hour

  • The easiest way to achieve this would be to calculate the square footage of the room or space you plan to make use of the atmosphere purifier in and compare that with a unit’s recommended coverage area. This method is not difficult. Just multiply the size of your space in feet because of the width associated with the space in feet. The end result could be the coverage area you will look for as your look for a model. On, there is these details close to “Manufacturer-Suggested Room Size” on the Specifications tab of every air cleanser product page.
  • When you yourself have allergies or asthma, we recommend you choose to go one step beyond solely thinking about the square foot coverage area and also consider the quantity of air changes each hour, or ACH, a unit will produce. ACH indicates what number of times an air purifier processes the complete volume of air in a targeted space each hour. Put differently, just how many times will your air cleanser clean all the air in your bedroom in 1 hour? The greater amount of air changes per hour an air purifier produces, the cleaner your air. Allergy- and asthma-sufferers – and people attempting to create the cleanest indoor air possible – should try to find air purifiers that will produce at least 4 air changes each hour.
  • If you should be searching for an air purifier on, we make it simple to find an air purifier that fits your ACH preferences. Seek out the “Room Size predicated on 4 ACH” specification listed on the Specifications tab of each air cleanser product page. This bit of information notes the utmost size of space (in square feet) you should use the atmosphere purifier in to achieve 4 complete air changes each hour. This number can often be less than the manufacturer-suggested room size, but it gives you an even more accurate expectation for how well an air purifier will clean your air and help relieve your symptoms.

Whole Home Air Purifiers

  • Take into account that air purifiers perform best in the room these are generally put into. Portable air purifiers will likely not effectively clean the air in your complete house while sitting in one single spot. If you’re interested in an entire home solution, consider a complete house air cleaner. Whole home air cleaners work with your existing HVAC system to purify the air as you heat, cool, or ventilate all the rooms in your house. These models tend to be a bigger investment in advance since they’re much bigger systems and require professional installation by an HVAC professional. However, in the long-term, they tend to function as the less expensive and much more effective solution with regards to improving air quality through your home. Plus, with a complete house air purifier, you won’t have to replace filters as frequently as you would with a portable air purifier and you’ll appreciate simple set-it-and-forget-it operation.

What type of Features Do You Really Need?

air cleaner buttons a lot of home air cleaners available today have a variety of special features that enhance air-cleaning, result in the air cleanser more straightforward to use, and save energy. These features add convenience to your life and optimize operation to best suit your needs. As you shop, consider carefully your requirement for these features. Will they be useful? Are they ‘must-haves’ or ‘nice-to-haves’ as it pertains to your requirements? Here is a summary of common added features electronic home air cleaners often have.

  • Electronic/Digital Controls — Allow you to more accurately select your operation settings.
  • Remote Control — Allows you to easily control operation from a comfortable distance.
  • Multiple Fan Speeds — Have your choice of multiple purification speeds to fit your indoor pollution level or sound preference.
  • Filter Replacement Indicator — Typically in the shape of lights, these indicators alert you if it is time and energy to replace your filters.
  • Programmable Timer — Program operation to turn on and off at peak times during the day to aid save energy.
  • Carrying Handle — Handles help you easily maneuver the air purifier in the event that you want to move it from space to space.
  • Casters — Along with handles, casters often helps ensure it is significantly simpler to move your air purifier.
  • Germicidal Protection — Fight airborne bacteria and viruses along with allergens with an air cleaner equipped to fight germs.
  • Ionizer — Help promote the capture of small and enormous particles and tend to be thought to help improve your mood.
  • Air Quality Monitor — Some air purifiers can sense the degree of pollution in your environment and automatically adjust purification settings towards the level had a need to eliminate the pollutants.
  • Wi-Fi Capabilities — The innovations are continuing for air purifiers. Many new models can be put up through an app to possess total control of your living space’s air from your own phone. Not only are you able to adjust your settings from anywhere, many apps enable you to receive real-time quality of air information as well. BlueAir models are recognized for their updated technology and Wi-Fi capabilities.

How About Noise Level?

It is rather rare you will run into an entirely silent air purifier. Most models use internal fans and certainly will emit some standard of noise, with regards to the purification speed you decide on. Using this, it is vital to consider carefully your noise preference and account for where you plan to use the air cleaner. Think about these questions to aid guide the selection of model and adjust your expectations.

Will the atmosphere purifier be within my bedroom?

  • This is basically the most common area to use an air cleaner plus the most recommended. It’s also the number one area where people find high levels of sound to function as most disturbing. If you are a person who cannot tolerate any noise while falling asleep, using an air purifier with a programmable timer that can be set to make the machine on when you are deeply asleep is an ideal solution.
  • On the bright side, many individuals benefit from the “white noise” produced by an air cleanser because it can help create a calming effect in the room. Either way, it’s important to realize that most air purifiers will make noise. It is simply a matter of choosing the standard of sound you’re more comfortable with.

What is the decibel rating regarding the air cleanser and how performs this match up against other common sounds?

  • Many air cleanser manufacturers list a decibel (dB) rating for every single fan speed. It is possible to compare these ratings into the sounds produced by other indoor appliances, for instance the noise emitted by an average box fan or even the “hum” sound that a refrigerator makes. This will provide you with a point of reference when coming up with your preference. Make use of the comparison chart below to get a concept for the standard of sound an air purifier could make according to its decibel measurement.
  • Remember, noise levels are different for every individual. Even decibel results can often be misleading since several things make a difference the sound level, including the position for the air cleanser, whether carpeting is present, the actual quantity of furniture within the room, the length one is through the air cleaner while it is running, and the chosen fan speed, among others. You will find, however, steps you can take to reduce the result associated with noise an air purifier makes.


  • Regular maintenance is an important part of keeping your air cleanser working effectively for the long-term. Not surprisingly, there clearly was a lot of cost and energy required. Certainly, home air cleaners is useful for a time as a “set it up and forget it” appliance. However, to obtain the most out of your investment you will have to replace the filters at the manufacturer’s recommended time intervals or as required (if you are using a filter air purifier) or higher frequently with respect to the standard of pollution in your indoor environment. And in case you choose to purchase an air sterilizer, you should be focused on performing recommended maintenance periodically so that it running just like new.