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6 Best Ozone Free Air Purifier in 2021 (Mechanical)

Ozone and air purifier don't gel well together. The former irritate the lungs while the latter cleans the air from airborne pollutants. In this post, we will guide you through the best ozone free air purifier current on sale in the market. Every model will be thoroughly reviewed on the filtration performance, coverage, number of features, and safeness with no harmful byproducts. At the end of it all, you will know which model to place your hard-earned money on.

2021 Best Ozone Free Air Purifiers

NoImageAir PurifierOnline Price (Amazon)FiltrationCoverageScore
1Winix 5500-2 PlasmaWaveWinix 5500-2 Air Purifier

$$$

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4-stage360 sq. ft. (33 m2)5
2Airmega 300Airmega 300 Air Purifier

$$$$$$

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4-stage1256 sq. ft. (117 m2)4.5
3Honeywell HPA300Honeywell HPA300 Air Purifier

$$$$

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3-stage465 sq. ft. (43 m2)4.5
4Medify MA-15 Air PurifierMedify MA-15 Air Purifier

$$$

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4-stage330 sq. ft. (31 m2)4
5IQAir HealthPro Plus Air Purifier

$$$$$$$

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4-stage1098 sq. ft. (102 m2)5
6LEVOIT Core 300 True HEPA Air PurifierLEVOIT Core 300 Air Purifier

$$

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3-stage219 sq. ft. (20 m2)4

How Do We Measure?

There are many things to consider when choosing the best ozone free air purifier. Some models are particularly good at removing certain pollutants in the air but at the cost of ozone emission. To help differentiate every model's pros and cons, the buying guide below will list down the things you need to look into. This will ultimately protect you from mistakenly purchasing an ozone generator that does more harm than good.

  • Certification - Check out the product's spec sheet and look for keywords like CARB compliant, ozone-free. It is a selling feature and manufacturers will always highlight it if the model does not emit ozone. Other certifications like AHAM, Energy Star would also come in handy as well.
  • Mechanical filtration (HEPA + Carbon) - To achieve ozone free purification, you will need a permanent pre-filter, HEPA filter for microscopic pollutants, and an adsorbent carbon filter for smoke particles. That is the gold standard and there is no substitute for it. Any addon filtration like an ionizer, UV-light should be included as optional.
  • Room size - Find out the room size you intend to use the air purifier and compare that with the manufacturer's recommended room size. Always go with a model that delivers a higher or equal capacity to your room size. You can also calculate the air purifier capacity based on its CADR.
  • Clean Air Delivery Rate (CADR) - The official metric by the Association of Home Appliance Manufacturers on the volume of air that can be filtered by an air purifier. CADR will be measured in 3 categories: dust, smoke, and pollen. Focus on the one you have the highest concern with or anything above 200 cfm. The higher the CADR, the faster an air purifier can cycle clean air.
  • Noise level - Test the low/ high speeds of an air purifier and see if you are comfortable living with it day in, day out. When given the option, go with a model that outputs 50 decibels or less similar to a normal conversation. The less noisy is an air purifier, the more likely you will use it.
  • Features - The more features an air purifier has, the more runtime it will likely have. Prioritize convenient features such as auto mode, sleep mode, timer, and air quality indicator. Addon features e.g. nightlight, child lock, remote control, and Wi-Fi support with smartphone integration could come in handy as well.
  • Pricing - Set a budget and never go beyond a price that you are not comfortable paying. Pay attention to the filter cost as you will have to bear the recurring cost on a yearly basis.
  • Maintenance - Pick a model that requires less maintenance and care especially if you are staying in a bad indoor air quality environment. Some air purifiers require more frequent filter change every 3 to 6 months while others only need an annual filter change.

Winix 5500-2 is a reliable, ozone-free air purifier with a little bit of caveat (more on this later). It only costs a fraction of some models on this list yet with all the desirable features you ever need. The sleek black body is not overly bulky that you may have a difficult time finding a placement. Movability is good as you can effortlessly grab onto the back handle for multi-location purifying. Overall, a very well-built machine with no signs of poor alignment or off-gassing.

Modern yet highly functional. Winix 5500-2 is packed with useful features starting with the front air quality indicator. The light indicator color will change to blue when the air is clean, yellow when moderate, and red when air quality is bad. The top controls are straightforward to use with standard 4 fan speeds, auto, and sleep mode. Timer helps manage the runtime before you leave for work or out of town. The filter replacement indicator alert you to change the filter accordingly. The remote control is the final piece of the puzzle that enhances Winix's easy operation.

Into Winix PlasmaWave 5500-2 specification:

  • Mechanical filtration - Yes (Pre-filter, True HEPA filter, Advanced Granular Carbon Filter, PlasmaWave Technology)
  • Room size - 360 sq. ft.
  • Dimension (W x H x D) - 15 x 23.6 x 8.2 in
  • Weight - 15.4 lb
  • CARB compliant - Yes
  • Warranty - 2 years

Winix 5500-2 is a CARB compliant air purifier. When air is drawn in from the sides, the pre-filter blocks dust, debris, and other larger contaminants from passing through. The True HEPA filter will instead trap 99.97% of microscopic particles in the air as small as 0.3 microns such as mold, pollen, pet dander, germs, and bacteria. The Advanced Granular Carbon filter adsorbs smoke fumes, and odors from common culprits e.g. cigarettes, cooking, pet, VOCs, asbestos, radon. The optional PlasmaWave produces Hydroxyls to help break down stubborn allergens. It will emit ozone but at a very low level under 0.01 ppm. For context, the safety emission level of ozone should be under 0.05 ppm. You can disable the PlasmaWave if you are not comfortable using it.

Classic sides air inlet and back air outlet setup. Winix 5500-2 delivers a decent 360 square footage that can cover a bedroom, living room, storeroom, kitchen, basement, garage, and playroom. Airflow delivery rate is rated at 226 cfm output which tallies with the CADR at 243 cfm (dust), 246 cfm (pollen), and 232 cfm (smoke). For those with severe allergies particularly during hay fever season, run it in turbo mode for at least a couple of hours. Otherwise, leave it in auto mode and Winix 5500-2 will only run at a higher speed when it detects a drop in nearby air quality.

Noise level is quiet at only 26.6 decibels when running at the lowest speed and audible noise at 60+ decibels at turbo speed. For night use, sleep mode will activate automatically when the room is pitch black thanks to the built-in light sensor. As an Energy Star model, power consumption is fairly consistent between 5 to 90 watts per hour. You will not be hit by a high electricity bill even on daily use.

So what's the catch with Winix 5500-2 air purifier? Nothing much other than the built-in sensor occasionally slow to react to air changes. The 80 dollars filter replacement cost is also slightly high for its segment. If you want to be picky, the 2 years warranty period could be longer like some of Winix newer released models. We would still wholeheartedly recommend this to people that need air cleaning at a more reasonable access point.

In short: A highly accessible HEPA air purifier packed with all the premium features you ever needed. Arguably the best ozone-free air purifier for the masses.

MRSP/ RSP**
± 249.99 p
     Annual filter ^    
± 80 p
 Online price*
$$$
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Allergic to dust, mites, or anything in between? Coway Airmega 300 air purifier will come to the rescue. A 100% mechanical filtration setup that produces no ozone during the course of purification. Safeguarding the operation is a heat-resistant case that will not release toxic byproducts due to the increased room temperature. The 5 years warranty further solidifies its build quality that guarantees trouble-free ownership.

Featuring a modern metallic-like exterior that looks premium at every angle, Airmega 300 comes with a front circle indicator that will change color according to the room's air quality. The top controls allow you to quickly adjust the 3 fan speeds, activate the smart mode or set 1, 4, or 8 hours time for the air purifier to shut down. A separate Pre-filter and HEPA filter indicator will alert you when the filter needs to be clean or replace. Last but not least, a dedicated light button that enables/disables the front indicator light.

Into Airmega 300 specification:

  • Mechanical filtration - Yes (Dual Pre-filter, Green True HEPA filter, Activated carbon filter)
  • Room size - 1256 sq. ft.
  • Dimension (W x H x D) - 13.6 x 21.2 x 13.6 in
  • Weight - 21.4 lb
  • CARB compliant - Yes
  • Warranty - 5 years

Airmega 300 has an outstanding 1256 square feet of room space at 2 air changes per hour. For asthmatic persons with sensitive lungs, you can increase the air changes to 4 or every 15 minutes at a cost of smaller 628 square footage. CADR reflects well on the strong airflow with a high output of 260 cfm. Great for large room sizes like office, bedroom, basement, living room, or an entire floor of a single apartment with doors wide open. Auto mode automatically adjusts the fan speed to high when there is a high concentration level of pollutants detected. Otherwise, it will maintain the fan speed at low.

Airmega 300 air purifier has a slightly different setup than the rest. It uses 2 washable pre-filter to trap contaminants that are coming in from each side of the air inlet. The pre-filter will also protect the dense but fragile HEPA fiber from being damaged by large particles. The Max2 HEPA filter traps 99.97% of airborne contaminants down to 0.3 microns like mold, pollen, dust mites, pet dander, germs, and bacteria. For smoke particles, you have an activated carbon filter to absorb chemical fumes like paint, food, tobacco smoke, and outdoor pollution. The entire air filtration is done mechanically therefore you will not find a single trace of ozone emission.

A certified Energy-star model, Coway Airmega 300 power consumption varies at 6 to 57 watts depending on the fan speed. The stronger the airflow output, the more energy it will consume. Continue on, the 22 decibel noise level is subtle when running at the lowest speed. Suitable for night use as it will run quietly while you sleep. Once you move up the speed, it will generate white noise that can be loud for some people. To save you all the trouble, leave it in sleep mode when you're trying to get some shut eyes.

While Coway Airmega 300 is an awesome mechanical air purifier with strong filtration performance, its 500+ price tag is not. There are cheaper ozone-safe air purifiers out there that could do an identical job. The high filter cost is also another recurring theme that you will have to bear annually. Lastly, you can top up a little more for the Wi-Fi S variant that adds auto sleep mode and a real-time filter change indicator. The choice is yours.

In short: A proven, highly functional mechanical HEPA air purifier with super-wide air-purifying coverage. You do have to pay top dollar for it though.

MRSP/ RSP**
± 649.00 p
     Annual filter ^    
± 100 p
 Online price*
$$$$$$
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With so many raving reviews, there is no denying that Honeywell HPA300 True HEPA allergen remover is one of the best ozone-free air purifiers in the market. The iconic black housing body not only looks good in the living room, it doesn't take out a lot of space like some of the bigger units here. You can effortlessly carry it to a different room when needed by grabbing on the handle. Overall, the build quality is tight with no signs of toxic off-gassing detected. The long 5 years is a good testimonial to that.

Honeywell HPA300 top controls are easy to use even though there is not much option to tinker with. You have the standard power button and the option to choose different cleaning modes such as Allergen, General Clean, Germ, Turbo mode. For the majority of the people, just stick it with general clean mode for normal use and Germ mode during allergy season. The useful but limited timer can be preset to shut down the air purifier and the dimmer button allows brightness adjustment. There are also 2 LED electronic filter change reminders with one for the True HEPA and the other for the carbon pre-filter. A well, underappreciated feature.

Jumping into Honeywell HPA300 specification:

  • Mechanical filtration - Yes (Carbon Pre-filter, True HEPA filter)
  • Room size - 465 sq. ft.
  • Dimension (W x H x D) - 20.8 x 22.4 x 10.8 in
  • Weight - 17 lb
  • CARB compliant - Yes
  • Warranty - 5 years

Honeywell HPA300 True HEPA allergen remover is 100 percent ozone-free with its classic 3-stage filtration. The multi-function carbon pre-filter traps dust, hair, smoke, and odors that pass through. Next, the True HEPA filter capture 99.97% of the airborne particulates including pet dander, mold, mildew, pollen, and germs. At turbo speed, Honeywell HPA300 air cleaner can cover a wide 465 square footage. Ideal for large spaces like living room, bedroom basement, tandem garage, playroom, and single-room office. CADR reflects well too with a high output of 320 cfm for dust, 300 cfm for pollen, and 300 cfm for smoke. With its multi-cleaning mode, it is highly suited for a person that is suffering from a cold, cough, and breathing difficulty due to bad air.

Honeywell HPA300 abundance of airflow output does generate a fair bit of noise. However, you can always keep it down by running at the lowest speed (germ mode). Energy usage is good despite the lack of Auto mode. Just pick a mode you want and the air purifier will operate efficiently throughout the day.

A good mechanical machine but lacks any practical features to enhance its usability. You will not find auto mode, sleep mode, digital display, and air quality indicator here. We are not the biggest fan of the carbon pre-filter too that uses a thinner carbon sheet. You would be better off with a dedicated carbon filter in dealing with smoke particles. Those are the few minor tradeoffs that come with HPA300. Still perfectly liveable for everyday use.

In short: A well-loved HEPA air purifier powered by 100% mechanical filtration. Go with this if you don't mind skipping out on the ionizer.

MRSP/ RSP**
± 249.99 p
     Annual filter ^    
± 108 p
 Online price*
$$$$
CHECK LATEST AMAZON PRICE

An ozone-free, medical-grade air purifier that we can vouch for. Medify MA-15 HEPA air purifier is the entry-level variant that comes at a small 9.7 inches diameter and only 15.5 inches in height. The 6.6 pounds weight inclusive of 6 filters doe not hinder its portability. You can carry it around for room to room purifying or just stick to one spot with the worst air condition.

Available in white, silver, and black, the bottom to top air circulation setup works very well in a small air purifier. The same goes with usability where the entire operation is very easy to use. You have the 3 adjustable fan speeds, timer, and filter change indicator after 2,500 hours of run time or every 3 to 4 months. There's is also a child lock feature that locks the control from any adjustment until you disable it. The final highlight of Medify MA-15 is the lifetime warranty that covers all key component parts as long as the filter is replaced on time.

Running through the key specification:

  • Mechanical filtration - Yes (Pre-Filters, HEPA H13 filters, Activated Carbon Filters)
  • Room size - 330 sq. ft.
  • Dimension (W x H x D) - 9.7 x 15.5 x 9.7 in
  • Weight - 6.6 lb
  • CARB compliant - Yes
  • Warranty - Lifetime

Double effort, double result. Medify Air MA-15 air purifier uses a Medical-grade mechanical filtration that produces zero ozone. Air drawn in you first be filtered by the dual pre-filter. With dust and other large particles blocked from passing through, the dual H13 true HEPA filter can focus on removing 99.9% of allergens as small as 0.1 microns including mold, pollen, bacteria, and viruses. Finally, the dual carbon filter with carbon pellets absorbs smoke and smelly odors coming from household products, pets, cooking, cigarette.

Living healthy with constant clean air. Despite its low selling price, Medify MA-15 has a strong output of 330 square feet at 2 air changes per hour or every 30 minutes. Suitable for an allergenic person. The official clean air delivery rate is equally impressive at 150 cfm for dust, pollen, and smoke. Given its smaller body framework, Medify MA-15 will fit well in a studio, dorm, small office, kitchen, bedroom, walk-in wardrobe, or any place with limited spaces.

Noise level favor Medify MA-15 air purifier at only 35 dB during low speed all the way up to 51 dBA. It will run silently in the background while you sleep soundly at night. Power consumption is at 18 wattages per hour but could vary depending on the fan speed Medify is running. It will not be a big hit in the utility bill even in a worst-case scenario.

Medify MA-15 HEPA air purifier might excel in most areas, the high filter replacement cost could counter it all. You will have to pay around 70-140 dollars yearly depending on how bad is the indoor air quality. The lack of autonomous mode is also a big missed but that's just the reality of air purifiers at this price range. If you want guaranteed safe, clean air at a compact form factor, you can't go wrong with this model.

In short: An affordable, compact, and safe medical-grade HEPA air purifier for everyday use. The golden ratio for size and performance.

MRSP/ RSP**
± 119.00 p
     Annual filter ^    
± 70 - 140 p
 Online price*
$$$
CHECK LATEST AMAZON PRICE

Some air purifiers emit byproducts like ozone, IQAir HealthPro Plus does the opposite by removing harmful ozone in the air. It is certified by the International Association of Air Cleaner Manufacturers (IAACM). This iconic, Swiss made air purifier stands out from the crowd with its gigantic ABS plastic housing body. While there is no denying its hefty heavy, you can still move it around with the help of the 4 durable casters. Build quality is at another level where everything feels premium on touch. The long warranty is the perfect assurance of its reliability even in the harshest condition.

IQAir HealthPro Plus works straight out of the box. The top controls are well-defined with a digital display and an advanced programmable timer built-in. You can set a specific day and speed to run or shut down the air purifier. There is also an Intelligent Filter Life Monitor that will accurately reflect the filter usage life. You only need to replace the filter when it is completely worn out. A remote control is included that lets you access most functions at a comfortable distance.

Moving on to IQAir HealthPro Plus specification:

  • Mechanical filtration - Yes (PreMax Filter F8, HyperHEPA Filter H12/13, V5-Cell Gas & Odor Filter MG)
  • Room size - 1098 sq. ft.
  • Dimension (W x H x D) - 15 x 28 x 16 in
  • Weight - 35.3 lb
  • CARB compliant - Yes
  • Warranty - 3 years

An absolute knockout from IQAir. HealthPro Plus has a highly adjustable 6 fan speed that outputs between 41 to 300 cfm of airflow. With its 3D UltraSeal triple-seal technology, it can reach up to 1098 square feet of space. Ideal for large room sizes like living room, kitchen, basement, and garage. It is also highly suited for a nursery home, office, studio, whole house, and apartment.

IQAir HealthPro Plus outstanding airflow is well complemented by the world's best filtration. The outer PreMax Filter traps large particles to protect the inner filter from getting clogged. The V5-Cell Granular activated Carbon filter with Pelletized chemisorption absorbs smoke and odors from cooking, pets, cigarette, VOCs, CO, formaldehyde, asbestos, and radon. In fact, it can even remove about 95 percent of the ozone in the air. The last stage HyperHEPA filter captures biological pollutants as small as 0.003 microns size e.g. mold, bacteria, and viruses before releasing the clean air back out. A normal HEPA filter simply does not have the caliber to do so.

Depending on the fan speed, the noise level can be subtle between 25 to 59 dB. This is partly contributed by the backward curved fan-in-center centrifugal and double-walled housing. There are also a sound deflector EvenFlow Diffuser and a rubber suspension pad to reduces the motor vibration noise. Power output is reasonable at around 27 to 215 watts based on the usage volume. Again, the scheduler/ timer can help manage the energy consumption.

The biggest drawback with IQAir HealthPro is the cost. At around 899 dollars, it is 3 times more expensive than a standard HEPA air purifier. Filter replacement cost is also on the high side despite the long 2 years for V5-Cell and 4 years lifespan for HyperHEPA Filter. The lack of auto mode is also disappointing at this price point but you always have the advanced scheduler to balance things out. Overall, If you can give it to the size and price, this is probably the best option currently available.

In short: An expensive but powerful air purifier that can remove airborne particles 100 times smaller than a HEPA filter could. All this is achieved purely on mechanical filtration.

MRSP/ RSP**
± 899.00 p
     Annual filter ^    
± 152 p
 Online price*
$$$$$$$
CHECK LATEST AMAZON PRICE

An affordable, ozone-free air purifier with an H13 HEPA filter. Levoit Core 300 ticks all the right box and it only costs you less than 100 dollars. This award-winning, South California designed air purifier has the right balance between modern exterior and portability. Available in black or white, the 8.7 x 14.2 x 8.7 inches dimension will blend into your home decor instantaneously. You can place it by the bedside, work desk, TV cabinet, or shelf without being obstructive. The light 8.8 lb weight makes it the ideal travel companion or room to room purifying option.

Operating Levoit Core 300 air purifier could not be any easier. You have the simple 3 fan speeds control plus sleep mode for night use. Supporting that is the 3 preset timers and filter change indicator that reminds you to replace the filter after an interval. Another hidden but well-appreciated feature is the child lock feature. Simply hold on to the button it the controls will be locked from children meddling with the setting. On the whole, build quality is up there with the best despite its low price range. You can safely leave it running 24x7 without a care in the world.

Here is Levoit Core 300 key specification:

  • Mechanical filtration - Yes (Pre-filter, H13 True HEPA filter, Activated carbon filter)
  • Room size - 219 sq. ft.
  • Dimension (W x H x D) - 8.7 x 14.2 x 8.7 in
  • Weight - 8.8 lb
  • CARB compliant - Yes
  • Warranty - 2 years

LEVOIT Core 300 filtration could not be any simpler. The initial pre-filter will trap large impurities in the air like dust, lint, hair and protect the inner HEPA filter. The shielded H13 True HEPA filter removes 99.97% of fine particles as small as 0.3 micrometers. The last-stage granular activated carbon filter neutralizes smoke, chemical, and odors. For even better filtration, upgrade to the optional Pet Allergy Filter that is effective against pet odors, diapers. Otherwise, choose the Toxin Absorber Filter that targets air pollution like wildfire smoke, vehicle exhaust, VOCs. For biological pollutants, choose MB Filter that neutralizes mold, bacteria, and halt their growth.

Levoit Core 300 is a 100% ozone-free, CA PROP 65 complaint model without the use of an ionizer and UV technology. The VortexAir technology cyclonic airflow system delivers a swift 12 minutes of air circulation. It can reach a room space of 219 square footage at 5 air changes per hour. Highly suited for a hypersensitive or asthmatic person. Works best in the bedroom, nursery home, kitchen, and small apartment. Clean air delivery rate (CADR) is rated at 140 cfm for dust, 145 cfm for pollen, and 141 cfm for smoke. Not the greatest but for close-range use, it will be fine.

An Energy Star certified air purifier powered by QuietKEAP technology with an internal shock pad. It helps absorbs noise, increases abrasion resistance, and extends the motor usage life. At low speed, Levoit Core 300 only outputs a whispering 24 dB noise that will not disturb your sleep. Even running at high speed with a max 54 dB noise is still reasonable for everyday use. Power consumption is averaging at 45 watts depending on the operational hours. Suitable for all-day operation without the high cost to incurred.

At such a low price, something has to give in and thankfully is not the build quality. The entry-level Levoit Core 300 omitted convenience features such as auto mode, sensor, and air quality indicator. The relatively small filters will have to be replaced every 6 to 8 months. Filtration-wise, it is on the lower tier but not to the extent that it is unusable. Simply put, the price more than justifies the performance you will get out of it.

In short: The best affordable air purifier under 100 with an H13 HEPA filter. A good starter machine to kickstart your air cleaning journey.

MRSP/ RSP**
± 99.99 p
     Annual filter ^    
± 20 - 40 p
 Online price*
$$
CHECK LATEST AMAZON PRICE
** MRSP (Manufacturer's Suggested Retail Price)/ RSP (Retail selling price) is provided by cleanairprice.com. Accurate at the time of posting.
^ Annual filter cost is calculated based on filter price and 12 hours of usage. Pricing could vary depending on air quality, usage frequency, and speed.
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Why Ozone Free Air Purifier?

Air purifiers can improve indoor air quality and our health by removing airborne pollutants in the air. Ironically, there are some air purifiers in the market that does the opposite by deliberately or unintentionally emit traces of ozone. According to the U.S. Environmental Protection Agency (EPA), inhaling a high concentration of ozone exceeding the public health standards (≤0.05 ppm) will have adverse effects on our health. Short-term exposure to ozone can cause shortness of breath, chest pain, coughing, and other respiratory ailments. Long-term exposure can lead to breathing difficulty, aggravate asthma, irritates lungs and damage the tissue cell.

American Lung Association recommends not to buy ozone generators that add ozone into the air. In October 2010, the state of California has banned the sale of these types of air cleaners. If you have pets, babies, children at home or are susceptible to respiratory diseases like asthma, you will need an ozone-free air purifier.

How Do I Know If My Air Purifier Is Ozone-free?

An ozone-free air purifier runs 100% on mechanical filtration. If there is a distinctive antiseptic, burning wire, chlorine smell emitted from an air purifier, it is not ozone-free. You can look at the spec sheet of an air purifier to confirm what technologies are involved in air cleaning. Alternatively, visit California Air Resources Board (CARB) website to find out if the particular model is indeed ozone less.

Types of Air Purifiers

There are many types of air purifiers in the market. Only mechanical air purifiers are completely ozone less and safe for everyone without compromising on the efficiency.

  • Mechanical (HEPA Air Purifier, Activated carbon purifier, Hybrid)
  • UVGI cleaner
  • Photocatalytic oxidation cleaner
  • Air ionizer/ Ion generator
  • Electrostatic precipitators
  • Ozone generator/ Ozonator
References

IQAir

Winix

Max Fernandez

A loving father and a dedicated reviewer for airfuji.com with more than 1000 air purifiers under his belt. Max Fernandez is also one of the million patients currently suffering from asthma. Feel free to nudge him if you have any questions.