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7 Best Ozone Free Air Purifiers

Last updated June 22, 2022

This post may contain affiliate links.

Author
Author avatar Paul Allen

Paul is our go-to-guy for air purifier and dehumidifier reviews. His apartment has become a de facto HouseFresh test lab where he pits the latest clean air technology against the perils of city center life. When he’s not putting a purifier through its paces, Paul likes to endlessly dig through dusty record shops (making his dust-free apartment even more important).

Ozone is a highly reactive gas that has the ability to change the chemical makeup of air pollutants when the two come into contact, giving it the power to neutralize pollutants and kill viruses, bacteria, mold, and other biological contaminants. However, according to the EPA, inhaling ozone even in relatively low quantities can cause:

  • Chest pain 
  • Coughing
  • Shortness of breath
  • Throat irritation. 

The concentrations of ozone generated by some air purifiers is less of an issue than it was 10-15 years ago, as regulations were brought into place to limit the amount of ozone purifiers could emit, such as the California Air Resource Board [CARB] who limit any unit sold in California to 50 ppb (parts per billion) of ozone.

Yet you should still be aware that ozone is a risk with any filtration technologies beyond the mechanical HEPA filters and Activated Charcoal filters which both create no byproducts. Be sure that you don’t buy anything called an ozone generator either, as they are used for empty rooms and should not be used as an air purifier.

The Top 3 Best Ozone Free Air Purifiers

Whether you’re looking for a purifier to remove gasses and odors, airborne particles, or an all-rounder that will target both, there is an ozone-free purifier for everyone on this list.

Those looking for smart features
Best Overall
Best for large spaces
Best for Large Spaces
Best for Small Spaces
Best Budget Option
Style
Smart Health Blast Mini Air Purifier (Blast Mini with HEPA filter)
LEVOIT Air Purifiers for Home Large Room, Covers up to 3175 Sq. Ft, Smart WiFi and PM2.5 Monitor, H13 True HEPA Filter Removes 99.97% of Particles, Pet Allergies, Smoke, Dust, Auto Mode, Alexa Control
LEVOIT Air Purifiers for Home Bedroom H13 True HEPA Filter for Large Room, Sleep, Quiet Cleaner for Dust, Allergies, Pets, Smoke, White Noise, Smart WiFi, Auto Mode, 300S
Pros
Powerful unit capable of cleaning very large rooms
Smart functions plus serious cleaning power
Perfect mechanical based filter for smaller rooms
Cons
A lot bigger than most consumer units
Filter replacements are high at $59.99
Might be underpowered for large or open spaces
CADR
435 CFM
410 CFM
141 CFM
Technology
H13 HEPA filter
H13 True HEPA filter
H13 True HEPA filter
Recommended Room Size
915 sq. ft.
Up to 1,588 sq. ft.
219 sq. ft.
Weight
59 lbs / 26.8 kg
13.7 lbs / 6.2 kg
5.95 lbs / 2.7 kg
Price
$599.00
$299.99
$149.99
Those looking for smart features
Best Overall
Style
Smart Health Blast Mini Air Purifier (Blast Mini with HEPA filter)
Pros
Powerful unit capable of cleaning very large rooms
Cons
A lot bigger than most consumer units
CADR
435 CFM
Technology
H13 HEPA filter
Recommended Room Size
915 sq. ft.
Weight
59 lbs / 26.8 kg
Price
$599.00
Best for large spaces
Best for Large Spaces
Style
LEVOIT Air Purifiers for Home Large Room, Covers up to 3175 Sq. Ft, Smart WiFi and PM2.5 Monitor, H13 True HEPA Filter Removes 99.97% of Particles, Pet Allergies, Smoke, Dust, Auto Mode, Alexa Control
Pros
Smart functions plus serious cleaning power
Cons
Filter replacements are high at $59.99
CADR
410 CFM
Technology
H13 True HEPA filter
Recommended Room Size
Up to 1,588 sq. ft.
Weight
13.7 lbs / 6.2 kg
Price
$299.99
Best for Small Spaces
Best Budget Option
Style
LEVOIT Air Purifiers for Home Bedroom H13 True HEPA Filter for Large Room, Sleep, Quiet Cleaner for Dust, Allergies, Pets, Smoke, White Noise, Smart WiFi, Auto Mode, 300S
Pros
Perfect mechanical based filter for smaller rooms
Cons
Might be underpowered for large or open spaces
CADR
141 CFM
Technology
H13 True HEPA filter
Recommended Room Size
219 sq. ft.
Weight
5.95 lbs / 2.7 kg
Price
$149.99

As part of our buying guides here at HouseFresh, we dive deep into the performance of every air purifier we recommend using our own measuring equipment for all manner of air pollutants. Our goal is to help you cut through the marketing hype and find the right air purifier for your home.

To help you find the perfect ozone-free air purifier for your home, we have collated 7 excellent mechanical-based units that don’t use any ionizing or active filtration technologies. 

 1. Blast Mini by Smart Air

When it comes to finding an air purifier with impressive purifying performance and long-lasting results, all while costing a fair price, the Blast Mini from Smart Air certainly ticks all the boxes. With a H13 HEPA filter and powerful fan, this purifier is capable of transforming the air in large spaces up to 915 sq. ft, with a clean air delivery rating of 435 CFM.

The Blast Mini offers unrivaled performance, putting its impressive stats into practice during our real-world tests. This unit eclipsed all other purifiers we have previously tested, completely clearing our medium-sized bedroom of pollutants in just 17 minutes.

Alongside the H13 HEPA filter, the unit also utilizes an easy to clean, plastic pre-filter and you can opt for an additional Activated Carbon filter to tackle VOCs and odors (Does HEPA filter remove VOC?). The filters boast an impressive lifespan of up to 2 years, meaning less expenditure and less hassle changing and discarding old filters. 

SPECS & FEATURES

Purifier technology:H13 HEPA filter
CADR (CFM / m³/h):435 CFM 
Recommended room size:915 sq. ft. 
Filter life:18 – 24 months
Noise level (low – high):44 – 53 dB
Dimensions (in inches / in cm):24.8H x 22.6W x 13D inches / 63H x 57.5D x 33W cm
Weight (in pounds / in kg):59 lbs / 26.8 kg
Energy consumption:$284.38 per year

What We Really Like:

👍 Super powerful fan allows 1400 m3/hr air intake
👍 Long lasting, quality HEPA filters
👍 Wipe clean pre-filter is effective and easy to maintain
👍 Castor wheels make it easy to move from room to room

What We Think Could Be Better:

👎 High power comes with high running costs
👎 By far the heaviest unit on our list (despite being called ‘mini’)

2. IQAir Healthpro Plus

For those looking for the best air purifier money can buy, then look no further than the IQAir Healthpro Plus. With almost 60 years of air cleaning expertise, IQAir have built a state-of-the-art purifier, utilizing their advanced HyperHEPA and V5-Cell filters, that can eradicate 99.5% particles as small as 0.003 microns, along with a host of VOCs and odor pollutants to boot.

When it comes to ozone and the technology causing it, IQAir takes a firm stance. They often highlight the danger it can pose to our health and oppose the use of ionizers and other active technologies, questioning the long-term benefits they offer. So much so, they even disassociate themselves with the industry-standard CADR ratings, in part due to the fact ozone emitting purifiers often score highly, despite the dangers they pose.

This purist approach is perhaps what we should expect from the godfathers of air purification. With their highly advanced filters (that last for years) and powerful fan performance that allows this unit to transform the air within a large space of up to 1125 sq. ft., this is certainly the crème de la crème of air purifiers for those with a big budget.  

SPECS & FEATURES

Purifier technology:HyperHEPA and V50-CELL gas and odor filter
CADR (CFM / m³/h):330 CFM 
Recommended room size:1125 sq. ft. 
Filter life:4 years
Noise level (low – high):25 – 69 dB
Dimensions (in inches / in cm):28H x 18W x 16D inches / 71H x 38W x 41D cm
Weight (in pounds / in kg):35 lbs / 16 kg
Energy consumption:$467.02 per year

What We Really Like:

👍 HyperHEPA filters are capable of capturing 99.5% of ultrafine particles
👍 Advanced VOC busting filters, loaded with 5lb of activated carbon
👍 Certificate of performance from production team in Switzerland
👍 10-year warranty

What We Think Could Be Better:
👎 Not the best looking unit on the market
👎 Expensive to buy and operate on high speed settings

3. Levoit Core 600S

The 600S is one of the flagship models from Levoit’s Core range, aimed for use in larger rooms or open-plan spaces whilst still remaining an affordable option. It comes with a 3-stage filtration system, with a mesh pre-filter and H13 HEPA to tackle airborne particles and an Activated Carbon filter to remove VOCs and odor pollutants.

This purifier comes with an excellent CADR rating of 410, primarily thanks to Levoit’s trademark VortexAir technology which will help to dramatically improve your indoor air circulation, changing the air in a 635 sq. ft room 5 times per hour. 

This super smart unit not only has an Auto mode to scan its surrounding environment for airborne pollutants and adjust the fan speed accordingly, but it also allows you to remotely operate the unit through the Levoit app or can even be connected to Alexa or Google assistant to utilize voice control. Plus, you can keep an eye on pollutant levels and the health of your filters either on the app or through the unit’s inbuilt display.  

SPECS & FEATURES

Purifier technology:H13 True HEPA filter
CADR (CFM / m³/h):410 CFM 
Recommended room size:Up to 1,588 sq. ft. 
Filter life:6 months
Noise level (low – high):26 – 55 dB
Dimensions (in inches / in cm):23.6H x 12.3W x 12.3D inches / 60H x 31.3W x 31.3D cm
Weight (in pounds / in kg):13.7 lbs / 6.2 kg
Energy consumption:$102.11 per year

What We Really Like:

👍 User-friendly app with useful data feedback
👍 Excellent 360-degree fan technology allows for more air changes per hour
👍 Sleep mode runs at a whisper like 26 dB
👍 Excellent value for money

What We Think Could Be Better:

👎 Filters could be larger and last longer
👎 Design is fairly mundane

4. Honeywell HPA300

The Honeywell HPA300 is a robust, no thrills workhorse of an air purifier. Boasting an impressive clean air delivery rate of 300 CFM, this purifier will make light work of airborne pollutants such as pollen, dust, or pet dander. Its pre-filter with a combined layer of activated charcoal will tackle larger particles and odors too.

While the HPA300 may look somewhat dated, remember to never judge a book by its cover. This unit packs an almighty punch, especially when taking into consideration its cost. During our real-world tests, it was able to clear the room of all harmful PM2.5 particles emitted from burning incense within 26 minutes, showing it’s more than capable of cutting it with the top-end, fancier units. 

With four speed settings, you can ramp up power when you need to tackle prominent pollutants or leave it on a low speed to run in the background, providing round-the-clock, ozone-free purification. Despite its more basic functionality, you can still set a timer for either 2, 4, or 8 hours, dim the lights for nighttime use and will receive a notification when it’s time to change the filter.

SPECS & FEATURES

Purifier technology:Activated Carbon Pre-filter and True HEPA filter
CADR (CFM / m³/h):300 CFM 
Recommended room size:465 sq. ft. 
Filter life:Pre-Filter 3 months, True HEPA Filter 12 months
Noise level (low – high):48.3 dB to 71.2 dB
Dimensions (in inches / in cm):22.38H x 20.8W x 10.83D inches / 56.8H x 52.8W x 27.5D cm
Weight (in pounds / in kg):17 lbs / 7.7 kg
Energy consumption:$189.01 per year

What We Really Like:

👍 Powerful performance makes up for lack of fancy features
👍 Fairly small in size making the unit easily manoeuvrable 
👍 Reasonably priced and easy to obtain replacement filters
👍 Simple to set up and operate

What We Think Could Be Better:

👎 Increasing the amount of activated carbon would improve performance against VOCs 
👎 A modernized design might suit more homes

5. Smart Air Sqair

The Smart Air Sqair is an excellent option for design-savvy homeowners who are looking for a practical and efficient way to improve indoor air quality. With a trusty H12 HEPA filter to tackle airborne pollutants such as dust and pet dander, plus an optional Activated Carbon filter for VOCs and odors, this purifier will reinvigorate your air without breaking the bank.

Following on from Smart Air’s humble beginnings of creating a DIY-esq, affordable fan and filter combination, the Smart Air Squair offers a simple and cost-effective air purifying solution that works excellently in medium-sized spaces between 150 ft² to 430 ft². 

This unit also gets top marks for design, thanks to its compact and contemporary aesthetic. As a small cube measuring less than 15 inches in height, width and depth, it will sit comfortably in any modern home, while its angled wooden legs bring a new dimension, elevating the unit itself as well as its appearance. 

SPECS & FEATURES

Purifier technology:H12 HEPA and optional activated charcoal filter
CADR (CFM / m³/h):185 CFM 
Recommended room size:Up to 430 sq. ft. 
Filter life:HEPA: Every 9 – 12 months. Carbon: 6 – 12 months
Noise level (low – high):23 – 52 dB
Dimensions (in inches / in cm):14.5 H x 13W x 13D inches /  37H x 33W x 33D cm
Weight (in pounds / in kg):16.5 lbs / 7.5 kg
Energy consumption:$82.55 per year

What We Really Like:

👍 Compact and lightweight making it easy to maneuver
👍 Cheap filter replacements and low energy use make it cheap in the long run too
👍 Cute design
👍 Super quiet on lowest fan speed

What We Think Could Be Better:

👎 No smart features such as air quality sensor or auto mode
👎 Without a timer you must remember to turn on/off your unit

6. Levoit Core 400S

The 400S is the mid-market unit from Levoit’s Core range, offering excellent purifying performance for a very reasonable price. Whether you’re affected by nuisance odors, harmful VOC gasses, or everyday airborne particles, thanks to the Core 400S’s 3-stage H13 HEPA, pre-filter, and Activated Carbon filtration, you can breathe easy in the knowledge it will remove 99.9% of airborne particles 0.1 microns in size.

With impressive statistics on paper, we were pleased to find the Core 400S’s performance measured up in the real world. Clearing all pollutants from our test bedroom in just 33 minutes. In comparison, the top end IQAir Healthpro Plus managed the same test only 8 minutes quicker, while the smaller Levoit Core 300S took 16 minutes longer. 

The Core 400S comes with a range of smart features rarely found on a unit within this price range. With inbuilt air quality sensors and an app providing real-time feedback on the air in your home, you can keep track of pollutants and act quickly to remove any harmful particles. While the capacitive controls are super intuitive to understand and add a nice design flourish to the unit.   

SPECS & FEATURES

Purifier technology:H13 True HEPA filter
CADR (CFM / m³/h):260 CFM 
Recommended room size:403 sq. ft. 
Filter life:6 months
Noise level (low – high):24 – 52 dB
Dimensions (in inches / in cm):20.5H x 10.8W x 10.8D inches / 52H x 27.4W x 27.4D cm
Weight (in pounds / in kg):14.12 lbs / 6.4 kg
Energy consumption:$82.55 per year

What We Really Like:

👍 Excellent performance for the price
👍 Smart features provide real-time feedback 
👍 Easy to set up and use
👍 Energy efficient, resulting in lower bills

What We Think Could Be Better:

👎 On the larger size for its room size suitability
👎 Replacement filters aren’t always easy to find

7. Levoit Core 300S

The Levoit Core 300S is a small but mighty machine, offering excellent purifying power for a great price. Equipped with a H13 HEPA filter, along with a pre-filter and Activated Carbon filter too, this unit comes with high-spec tech that will transform the air in small to medium-sized rooms, making the 300S our top pick for those on a budget.

As well as a reasonable initial purchase price, this unit is the cheapest to run in the long-term out of our top 7 recommendations. Even if left to run on full power, 24 hours a day, 7 days a week, this unit would only set you back $30.85 each year. When taking into consideration filter replacements too, the 300S continues to offer good value for money, with Levoit genuine replacements costing less than $30 and generic filters on Amazon as little as $19.99.

You’ve probably guessed by now, we’re big fans of the Levoit Core range. Levoit have managed to create a range of high-performance, ozone-free purifiers that are available for a wallet-friendly price tag. And the 300S is certainly no exception. Coming with all the smart features and patented tech that its bigger brothers do, with the only difference being a smaller room size suitability.  

SPECS & FEATURES

Purifier technology:H13 True HEPA filter
CADR (CFM / m³/h):141 CFM 
Recommended room size:219 sq. ft. 
Filter life:6 months
Noise level (low – high):24 – 48 dB
Dimensions (in inches / in cm):14.2H x 8.7W x 8.7D inches / 36H x 22W x 22D cm
Weight (in pounds / in kg):5.95 lbs / 2.7 kg
Energy consumption:$30.85 per year

What We Really Like:

👍 Great value for money
👍 Comes with a host of features not usually found at this price range
👍 Cheap replacement filters
👍 Exceptionally low running costs

What We Think Could Be Better:

👎 Filters not always available online

Common Questions About Ozone Free Air Purifiers 

🤔 How do I know if my air purifier emits ozone?

The quickest way to notice if an air purifier you have is exposing you to ozone is the smell. It will generally have an antiseptic odor. Also check out the surface surrounding the air purifier. If it is dusty, there’s a high chance it’s emitting ozone.

Another good indicator is the lighting on the unit. Ozone-emitting purifiers tend to have a blue light coming off it.

🤔Are all ionizers dangerous?

Not at all.


Many of the ionizers in use by companies like Blueair, Coway and others just use mild ionizing functions to improve the air cleaning performance of the HEPA filter. 

We have tested these units with ozone detections and have not seen any ozone detectable. 

But we still know that some people have sensitivities to ionization so we created this list of units that we can say 100% have 0 ozone created.

🤔 Do UV lights create ozone?

Demand for UV lights has recently risen, as we all look for effective ways to disinfect the air and surfaces around us. As some air purifiers come with inbuilt UV lamps, this may seem like an excellent way to kill any bacteria or viruses in your home. 

However, we typically find ultraviolet wavelengths of 185 nm are used in sanitizing and sterilizing systems, which are harmful to humans as this wavelength will emit high concentrations of ozone. If the lamp is correctly coated or housed in certain glass, this should protect the user. Although, there have been instances of ozone leaking from the lamps and creating a toxic atmosphere if used in an enclosed space, so we generally recommend avoiding UV purification. 

🤔 Can an ionizer make you sick?

Ionizers work by electrostatically charging airborne pollutants within your space. Once charged, the particles then become easier to be removed by your air purifier. However, during this process, they also release ozone as a byproduct. 

While this can just be trace amounts (depending on your purifier), inhaling concentrations of ozone can cause respiratory issues and irritation of the throat. It’s best to research any purifier before purchasing to see if, and how much ozone is emitted through its use. For those of you with asthma or other respiratory conditions, we recommend avoiding ionizers entirely.  

🤔 So… Which option is best for me?

Although there are many ozone-related air purifiers that work to kill harmful chemicals and diseases in the air, the production of toxic ozone makes them too risky to use in your home. Thankfully, there are numerous products available on the market for you to use. A good thing to do is always look at the type of filters used and go from there. It’s easier to narrow these things down when factoring in your needed room coverage, noise concerns, etc.

So, which from our list do you feel benefits you the most?

SOURCES

We calculated the monthly energy consumption costs with the help of our air purifier electricity usage calculator. We calculated daily and yearly costs associated with running an air purifier for 24hrs a day in California. You can customize the result by air purifier wattage and by state.

Last update on 2022-06-22 / Affiliate links / Images from Amazon Product Advertising API