The In-Depth Buyer's Guide 2019

Best Air Purifiers

Best Home Air Purifier 2019 – Air Purifiers Reviews Buyers Guide

9.8 out of 10

Purifying the air in your home leads to a cleaner environment and a healthier lifestyle. So naturally we purchased 14 of the best air purifiers and tested them extensively to see what they were made of. Our independent study to determine the top air purifiers in 2019 found that mechanical air filtering was the most efficient, and within that air purifiers that achieved a Clean Air Delivery Rate (CADR) of 200 or higher.

Multi-staged filtering through activated carbon filters also took priority as they capture more pollutants and help reduce odors. Lastly, the inclusion of at least simple control features, such as filter quality indicators, were important. That said, we only considered portable, single and multi-room purifiers in this study. It is important that you find a multi purpose air purifier for pets, mold, smoke, dust mites and allergies.

So what air purifier ended up on top after our extensive research and air tests? Our #1 Pick is the
Honeywell True HEPA Allergen Remover HPA300, which outperformed our initial fourteen other air purifiers. It’s a purely mechanical filtering system which is preferred to hybrid and electronic units, has a CADR rating of 300, can filter a space of up to 465 square feet, self monitors filter performance, weighs less than 25 lbs, comes with a 5-year limited warranty, and costs less than $200.

Below we’ll walk you through the technical aspects of air purification, how quality and reliability are impacted by purifier construction, and which air purifiers made our top five picks as the best purifier of 2019.

Top Air Purifiers Compared

- October 2019

How We Decided

4 main factors come down to picking the top purifiers.

200-1500 sq ft

5 years

Filter Replacement Alert


Editor's Choice

 Honeywell True Allergen Remover HPA300

  • Affordable
  • Effective at removing dust
  • 4 Speeds
  • Not many setting or control options
  • Only fit for one average room

Why We Like It: The purifier uses a two-stage, mechanical filtration process, first pulling air through an activated carbon pre-filter, then through a HEPA filter. It’s powerful enough to handle rooms up to 465 sq ft without a problem, and it also features an auto-off setting that’s convenient if you intend on using this unit passively as a multi-room appliance.

Best For Smoke

 Austin Air HealthMate Standard HM-400

out of 10
  • Filters dont need to be replaced often
  • Has decent area coverage
  • 4 stage filter
  • Not cheap
  • Little bit noisy on high-speed
  • No filter change indicator

Why We Like It: The HealthMate’s filtration process is top-notch, nearly industrial-grade. It’s a four-stage, mechanical purification system that first stops large particles like those from pet dander and dust, then medium-sized particles like pollen before passing air through the fifteen-pound, activated carbon and zeolite filter (it’s a beast), and then finally removing the the smallest contaminants with its HEPA filter.

Best Air Purifier for Pets

 Coway AP-1512HH Mighty Air Purifier

  • High tech
  • Very quiet
  • Plenty of operation options
  • May struggle with thick dust
  • Doesn’t cover a lot of space

Why We Like It: The Coway AP-1512HH doesn’t disappoint. Despite employing an ionization step in its filtration process, it performs exceptionally well. It uses a four-stage process to filter air, beginning with a simple pre-filter that captures larger particulate matter, then an activated carbon filter for gases and odors, followed by HEPA filtration, and finally passing air through Coways’ proprietary Vital Ionizer.

Best Air Purifier for Allergies

 Alen BreatheSmart

out of 10
  • Customizable color options
  • Very quiet
  • Large room coverage
  • No True HEPA for the price
  • High air filter replacement cost

Why We Like It: Unlike most other portable air cleaners on the market, the Alen BreatheSmart offers a ton of customization options. If you’re not thrilled about putting a bulky box in your bedroom, or living room, this unit may be the answer you’ve been looking for. Alen offers interchangeable front face plates in fourteen color options, allowing buyers to match their home’s decor (they even have a cover that can be painted).

Best For Dust

 Dyson Pure Cool Link TP04

  • Dyson good looks
  • Three products in one
  • Easy to use and intuitive app
  • Connecting to your home’s WiFi can be a laborious process
  • Fairly tall making it difficult to hide

Why We Like It: Our favorite when it comes to smart features and connectivity, the Dyson Pure Cool Link is part air purifier, and part fan. It comes with a remote, but it can also be controlled via a Google Play app and iOS app. From the smart device application users can also schedule operation times, and review indoor air quality reports.

Which Air Purifier is Right for Me

The majority of consumers shopping for an air purifier are probably going to be more concerned about performance than any other feature, and while all of our top picks performed well, if air purification efficiency is your #1 priority we recommend our Editor’s Choice/Best Air Purifier, the Honeywell HPA300​, or our Best Multi-Room Purifier, the Healthmate Standard HM-400

On the other hand, if you prefer a purifier that’s easy to customize, or one that plays nicely with the Internet of Things, we recommend the Alen Breathesmart and our Best Ergonomically Designed Air Purifier, the Dyson PureCool Link respectively

Key Factors and Features Considered – Air Purifier Reviews

The devil is in the details folks.


Filtering Process

We make a major distinction between purifiers that use purely mechanical methods to filter air versus those that incorporate electronic methods such as ionization. While ionization may work well in larger areas, the creation of ozone as a byproduct of the process is concerning in small, poorly ventilated rooms. Ozone particulate is also difficult for them to recover, and often causes deposit buildup on nearby walls, or furniture. 



The Clean Air Delivery Rate is the measure of 100% removal of a specific sized particle from a defined cubic feet per minute of air. Our testing threshold set a minimum acceptable CADR of 200 rated for smoke. We also calculated maximum recommended square feet from the CADR. Note: There are variations reported by some of our top picks. For instance, the Austin Air unit claims acceptable use up to 1500 sq ft, but using the CADR we found 341 sq ft to be the threshold.


HEPA and Activated Carbon Filters

You’ll be hard pressed to find an air purifier that doesn’t use a HEPA-rated filter, but finding one that uses an activated carbon filter with more than five pounds of medium is a bit more difficult. We gave extra points to filtration systems with five pounds of activated carbon, or more.. 



A pretty standard feature, self-monitoring helps the user keep track of filter efficiency and uses an alerting system to indicate when the filter needs replacing.



We hardly ever review products without checking manufacturer warranties. We used a limited warranty baseline of five years, and gave units with better coverage extra points.

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How We Choose

We began our research with the top fifteen most highly consumer-rated, portable air purifiers available in 2016. Chase Williams, an electrical engineer and staff contributor, helped review technical features and overall performance data. He’s worked as a project manager for some of the world’s largest specialty chemical manufacturers, and specializes in electrical room air quality, pressurization, and control systems. His unique experience in the field of air quality analysis helps to set our study apart from others.

Industry standards set forth by the EPA and the Association of Home Appliance Manufacturers helped us narrow our focus by defining the most important performance and safety features.

The most significant performance metric we used in rating was the physical filtering process itself. There are a lot of purifiers on the market that use ionization as part of the decontamination process to neutralize particulate matter too small for carbon and HEPA filters. Manufacturers will argue that ionization is a quality feature, adding value to the purification process, but the EPA (as well as multiple independent researchers)
advice against the use of ionization within portable air purifiers due to the creation of ozone byproduct. It’s true, there are also studies that show how well micro-contaminants can be filtered with ionization technology – but for single-room, portable air purifiers we don’t believe the introduction of a containment justifies the reduction of another.

Ozone is toxic, and above a specific volumetric level can be a significant health risk. All that said, some purifiers in our top five list feature ionization as part of the purification cycle, and while they may have ranked lower due to that, they moved past other purifiers due to an overall high score based on all of the metrics we measured.

One of the other more significant variables we used to judge performance was the Clean Air Delivery Rate (CADR) – a measure of how effective an air purifier is at removing particulates of a specific size from a volume of air at a defined rate of flow. The
Association of Home Appliance Manufacturers (AHAM) developed the CADR as a means of measurement and certification so that consumers weren’t mislead by poorly performing purifiers marketing high-efficiency filter ratings, or high CFM ratings.

All air pollutants aren’t created equal. Larger particles are heavier and typically more difficult for purifiers to process before they settle on the floor. Smaller contaminants often require specific filter types in order to containment. Because of this, the CADR is measured in three distinct performance tiers: smoke, pollen, and dust.

For our examination, we only ranked purifiers with a smoke CADR of 200, or higher (excluding the Dyson).We gave bonus points to machines using activated carbon filters as part of a staged filtering process. Even more points were awarded for purifiers with carbon filters of five pounds, or more.

An activated carbon filter is nothing more than a charcoal screen that has been treated to expand surface area in order to adsorb more vapors and solvents from the air. Maximum noise, unit weight, self-monitoring features, manufacturer warranty, consumer ratings, and price were all also considered during our review.

Mistakes to Avoid


Ozone Producing


Who Should Buy An Air Purifier

Thousands of consumers have stated that continued use of indoor air purification systems has improved their quality of life.

In addition to more commonly known air pollutants like pet dander, dust, mold, and smoke, other contaminants may be lingering that you’re unaware of. Anytime you cook, use cleaning products, paint, treat for insects, print documents, or use any kind of chemical process to do pretty much anything, Volatile Organic Compounds (VOCs) are released into your home’s air. As you might expect, levels of VOCs vary greatly from household to household, but the EPA estimates that most homes contain anywhere from two to a thousand times higher levels than outdoors.

VOCs are harmful to humans, and at certain concentrations can cause headaches, dizziness, nausea, and eye, nose, and throat irritation. Prolonged exposure to some VOCs can cause chronic health problems, including cancer and even death.

If you live in an area that has outdoor air pollution, have indoor pets, suffer from allergies, have constant headaches, or find that your eyes or sinuses are constantly irritated you should consider investing in a purifier and why our air purifier reviews are important considerations for you to follow.

Who Contributed to this Review

Tyler Lacoma


Shawn Sanders


Scarlet Barber


Ryan Hansen


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