7 Best High CADR Air Purifier In 2022 (Certified Air Performance!)

Is hard to determine which is the best air purifier with every manufacturer coming up with their own benchmark testing. Fortunately, AHAM, the independent home appliance organization came out with a standardized testing method which is the CADR we knew today. To make life easier for you, we have compared every model that is listed on the AHAM database based on the size, filtration setup, and specification. Find out which is the best CADR air purifier that you can buy right now along with their pros and cons.

Quick Summary

GermGuardian AC9200WCA Air Purifier ReviewAlen BreatheSmart 75i Air Purifier ReviewMedify Air MA-112 Air Purifier Review
GermGuardian AC9200WCA Air PurifierAlen BreatheSmart 75i Air PurifierMedify Air MA-112 Air Purifier
310 cfm/ 346 cfm/ 244 cfm347 cfm/ 347 cfm/ 347 cfm950 cfm/ 950 cfm/ 950 cfm
Recommended Room Size
378 sq. ft. (35 m2)1,300 sq. ft. (121 m2)2,500 sq. ft. (232 m2)
4.5out of 54.6out of 54.1out of 5
Amazon Price
** MRSP (Manufacturer's Suggested Retail Price)/ RSP (Retail selling price) is 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.
` The indicated online price guides as follows: $ = under $50, $$ = $50-100, $$$ = $101-200, $$$$ = 201-300, $$$$$ = $301-400, $$$$$$ = 401-500, $$$$$$$ = over $500.

How Do We Measure?

Having a high clean air delivery rate should not be your only consideration when purchasing an air purifier. There are other valuable benchmarks that can help you decide whether the air purifier you're about to purchase is the right one. To save you the trouble in going through every specification, here are the features you will also need to think about for the best CADR air purifier.

  • Clean Air Delivery Rate (CADR) - We're using the overall CADR metric between dust, pollen, or smoke. The higher the output, the swifter an air purifier can remove the particulates in a room. Never go below 200 cubic feet per minute.
  • Room size - A good benchmark to see if the strong CADR matches the recommended room size coverage. Go with a large air purifier that can cover at least 300 square feet with 2 air changes per hour.
  • Dimension - In general, high CADR air purifiers are big and bulky that occupy a lot of interior space. So think carefully about where you intend to place the model, measure the model dimension and make sure the device can fit in.
  • HEPA filter - A must-have filtration in any air purifier regardless of the specification. Make sure the air cleaner is equipped with an H13 or true HEPA filter instead of an inferior HEPA-type filter.
  • Carbon filter - Another must-have filter that covers smoke, toxic fumes, and odors. Choose dedicated activated carbon filter over a carbon pre-filter with a thin sheet.
  • Addon filtration - From germ-killing UV-light, negative ion generator, to antimicrobial, anything that can help clean the air would be welcome with open arms. Note that the CADR does not take into account any addon filtration.
  • Noise level - If you're considering using an air purifier during work or sleep, go with a model that outputs less than 50 decibels at normal speed.
  • Cost of ownership - There's no denying that the absolute best CADR air purifier will cost you a bomb (above 1 grand). So buy what you can afford to own and maintain as an air cleaner will last for ages.

The best bang for buck air purifier on the list with a high CADR. GermGuardian AC9200WCA is a highly regarded air cleaner that offers great value at an accessible price. It looks modern and sleek over most CADR air cleaners here thanks to the side air inlets and uncluttered removable panel. At a width of 17 inches and 27 inches in height, GermGuardian AC9200WCA commands little interior space compared with other big boys here. The bottom to top air circulation allows you to place the device by the corners with just a few feet of gap between walls. The 20.7 lb in weight is still manageable for room to room purifying when needed. Build quality is good for daily use with no signs of off-gassing due to poor fitting. The extended 3 years warranty covers any manufacturer defects that hinder usability.

A HEPA 5-stage air purifier without the outrageous price tag. The perfect balance between performance and cost.

Moving to the easy to use controls that GermGuardian AC9200WCA is blessed with. You have a standard 3 fan speeds, timer with preset 2/ 4/ 6 hours, and filter change indicator that alerts you to replace the filter or UV-C light when it is due. Since there is no auto mode available, everything has to be set accordingly before you leave for work or hit the sack. You also have the option to disable the ionizer and UV-C light during the purification.

Here are GermGuardian AC9200WCA key specification:

  • Air filtration - Pre-filter, True HEPA filter, Activated Carbon Filter, Ionizer
  • Room coverage - 378 sq. ft.
  • Dust CADR - 310 cfm
  • Pollen CADR - 346 cfm
  • Smoke CADR - 244 cfm
  • Warranty - 3 years

At around 300 dollars after discount, GermGuardian AC9200WCA has an impressive clean air delivery rate of 310 cfm for dust, 346 cfm for pollen, and 244 cfm for smoke. A rare trade for an air purifier of its caliber outpacing most competitor models. At an ideal speed and room temperature, it can cover a respectable 378 square footage of room size with good air changes per hour. Highly suited for a studio, small apartment, bedroom, living room, basement, playroom, and nursery home plagued with bad air. Another perk is the noise level and power usage are on the lower tier so no problem running it comfortably during work or sleep. No other CADR air purifiers here offer the air cleaning serenity that GermGuardian AC9200WCA gives.

GermGuardian AC9200WCA CADR Air Purifier Review

Controversially, the biggest strength of the GermGuardian AC9200WCA air purifier is not its CADR but the 5-stage filtration. Starting with the reusable pre-filter that trap large PM10 particles and protects the HEPA filter from being damaged by sharp objects. The true HEPA filter removes 99.97% finer PM2.5 contaminants like mold, pollen, mildew, pet dander, and germs. The activated carbon filter neutralizes household smoke, chemical fumes, and odors through chemical adsorption. For bacteria, viruses, and other pathogens, the UV-C light radiation permanently kills the biological pollutants with no chance of growth. Finally, the ionizer electrostatically charges negative ions that merge and weigh down airborne particles for the filter to capture. Both ionizer and UV light is safe and effective filtration but plays no role in the CADR measurement.

On to the few drawbacks we need to touch on. GermGuardian AC9200WCA does not have an outrageously expensive price tag (around 300 after discount), the annual filter cost can be a burden in the long run especially when indoor air quality is less than ideal. The UV light bulb intensity will drop substantially resulted in reduced performance if is not replaced in time. Another minor complaint is the lack of air quality indicator and Auto mode that can be useful at times. Not a deal-breaker for a CADR orient model as long as you understand what you're getting at.

In short:A HEPA 5-stage air purifier without the outrageous price tag. The perfect balance between performance and cost. ⚠️ Buy this if you want a decent CADR air purifier at a more attainable price.

online price (US)**
±499.99 $$$$$$/ 7

(annual filter cost ±128-182)


When the indoor air is at an unhealthy level with visible PM10 pollutants, you will need a high CADR air purifier like Alen BreatheSmart 75i. This high-performance, console-sized air cleaning machine stands at an 18.5 x 27 x 11.5 inches dimension and a hefty 32 pounds weight. Not the biggest model on this list but it will still take up some room space thus can be problematic for a small room. Design-wise, the classic side air inlets setup supports many customizable panels that you can swap out to match your interior design. There is also an air quality indicator that illuminates blue, yellow, or red light to reflect on the room's air condition. Fitting and build quality are second to none as evidenced by the Lifetime warranty (with subscription filter).

A premium, high CADR HEPA air purifier that offers customization in filtration and outlook. Addon filter upgrade is a must to complete the purification.

With tons of embedded features, usability is great with the Alen BreatheSmart 75i air purifier. You can cycle through the 4 fan speeds, optional ionizer activation, child-lock that locks the setting, 3 preset timers to shut down the machine, and our favorite auto mode. With energy-saving auto mode, BreatheSmart 75i will only run at a higher speed when there is an increase of airborne pollutants in the air. The advanced Smart Filter calculates the filter life so you only have to replace the dirty filter when it is completely worn out.

Here are Alen BreatheSmart 75i key specification:

  • Air filtration - Washable Pre-filter, HEPA-Pure Filter BF35, Ionizer
  • Room coverage - 1100 sq. ft.
  • Dust CADR - 347 cfm
  • Pollen CADR - 347 cfm
  • Smoke CADR - 347 cfm
  • Warranty - Lifetime

Here's why we picked Alen BreatheSmart 75i air purifier when it comes to air cleaning performance. It delivers a strong 347 cubic feet per minute for dust pollen, and smoke. Overly exceeded our minimum 200 cfm CADR threshold. Complemented by the 150-285 cfm of airflow delivery rate, the recommended room size is up to a wide 1,100 square footage at normal air changes per hour. It is ideal for large room sizes like living room, bedroom, basement, garage, kitchen, and home office. If your home constantly suffers from bad air quality from external pollutants, Alen BreatheSmart 75i can be a difference-maker.

Alen BreatheSmart 75i CADR Air Purifier Review

Alen BreatheSmart 75i is not the most silent air purifier in the market despite the incorporation of WhisperMax technology. The 42 to 56 decibels noise level is on the louder side due to the high airflow output. It is still suitable for everyday use as long as you keep the fan speed low. Power consumption is a tad high between 64 to 105 wattages output per hour tally with the CADR. You should still run it 24x7 with Auto mode enabled to conserve energy.

With its strong CADR, Alen BreatheSmart 75i can remove all types of airborne pollutants but you do need to choose the right set of filters. The first-stage pre-filter traps large particles like dust and prevents it from clogging the HEPA filter. The default HEPA-Pure filter removes 99.97% of airborne particulates as small as 0.1 microns including bacteria and viruses. For smoke filtration, you will need to upgrade to either mold removal HEPA-Silver filter, HEPA-FreshPlus, or HEPA-OdorCell filter that comes with additional deodorization filtration. Since the customized filter does not impact the CADR outcome, we recommend going straight for the best HEPA-OdorCell filter upgrade. Lastly, the optional ionizer generates millions of negative ions that attract and pull down positive ions pollutants in the air for the HEPA filter to capture. The technology is safe, effective but does produce a very insignificant amount of ozone (CARB approved). Since ionizer plays no role in the CADR ratings, you can turn it off as you wish.

The drawback with the Alen BreatheSmart 75i air purifier is obviously the cost. Not only you will have to take in the 700+ dollar selling price, the customizable panel costs money and so does the filter replacement set. If you opt for the upgradable filter, it will add another 30-40 dollars to the total cost annually. The aforementioned noise level is also on the louder side when running at a higher speed. If you are not a big fan of white noise, it can be distracting for those that are working from home or have a baby to take care of.

In short: A premium, high CADR HEPA air purifier that offers customization in filtration and outlook. Addon filter upgrade is a must to complete the purification. ⚠️ Buy this if you are OK with the extra charges on top of the selling price.

online price (US)**
±749.00 $$$$$$$/ 7

(annual filter cost ±66-99)


An expensive, clean, and modern air purifier with a touch of elegance. Medify Air MA-112 is undisputedly the best CADR performance model yet considerably small compared with some of the models here. The sleek design does not impair the airflow distribution in any shape or form. At 16 x 28 x 15 inches in size, you will have no issue finding a place for it unless you are living in a shared bedroom, dorm, or small cubicle with limited spaces. The heavy 32 pounds weight does pose more of a problem when you try to move it around. Otherwise, this is a very livable air cleaning machine.

Available in 2 colors, Medify Air MA-112 air purifier simple controls will work like a charm in cleaning unhealthy indoor air. You can cycle through 4 variable speeds or activate shutdown timers to manage the air cleaner runtime, Convenience child lock mode is here to lock the setting and prevent any unintended adjustment. Dimmer light mode disables all LED indicator lights that can be annoying when used during the night. A bonus in Medify Air MA-112, there is also a built-in sensor to support the air quality indicator, sleep, and auto mode. In auto mode, the air cleaner will automatically run at a higher speed when there is a large concentration level of pollutants in the air detected. AQI displays the current status of the room air quality and from there, you can see how the air purifier will react to it. Lastly, a fairly accurate filter replacement indicator will remind you to change the filter after 3,000 hours of air purification.

Safety-wise, Medify Air MA-112 air purifier is CARB (California Air Resources Board) approved ozone-safe, AHAM tested, and ETL listed. Build quality is tight with the goal set for long hours of operation. The lifetime warranty is the perfect testimonial of its long-term durability providing only an original Medify Air filter is used. Simply put, with Medify Air MA-112 air cleaner, you will be set for life.

Here are Medify MA-112 key specification:

  • Air filtration - Pre-filter, H13 HEPA filter, Activated Carbon Filter, Ionizer
  • Room coverage - 2,500 sq. ft.
  • Dust CADR - 950 cfm
  • Pollen CADR - 950 cfm
  • Smoke CADR - 950 cfm
  • Warranty - Lifetime

Great for hypersensitive person, Medify MA-112 air purifier CADR ratings is at an impressive 950 cubic feet per minute (cfm). A remarkable air cleaning achievement (3 times more to exact) considering its segment. With the high CADR. Medify MA-112 can clean 2,500 square footage of room size in 30 minutes or 2 air changes per hour. Double the air changes per hour to 4 (15 minutes), it can still reach 1,250 square footage of air cleaning space. Suitable as a whole-house air purifier or set for living room, master bedroom suite, basement, nursery, and home office. Unfortunately, the noise level will take a hit to accommodate the strong airflow. Anticipate a loud 70 decibels when the air purifier is running at max speed. You can keep it at the lowest speed when you need quietness e.g. during work or sleep. As an Energy Star rated model, power usage is reasonable for its class and the strong 950 cfm output. You can run it 24x7 with minimal impact on your utility bill.

Medify Air MA-112 CADR Air Purifier Review

Combining the best CADR and Medical-grade filtration, no pollutants will be too difficult for Medify Air MA-112 air purifier. The dual air intake pulls in air from both sides for the first round of filtration by the pre-filter. With both pre-filters capturing all the large particles, the H13 HEPA filter trap remaining microscopic particles as small as 0.1 microns with an efficiency of 99.9%. This includes lead dust mites, mold, pollen, pet dander, bacteria, and virus carrier. The activated carbon filter absorbs odor from pets, cooking, and toxic fumes from VOCs, asbestos, cigarette smoke, formaldehyde, and benzene. The optional ionizer diffuses charge negative ions to latch and merge pollutants ions in the air. This resulted in the latched particles falling from the increased weight allowing the medical-grade filter to capture. Medify Air 4-stage filtration efficiency is proven beyond doubt with only Blueair Pro that matches its superiority.

There is nothing bad to say about Medify Air H13 air purifier when money is no issue. Sadly, not everyone has the luxury to do so you might be better off with a slightly lower variant Medify Air model such as MA-50, MA-40. As always, the high filter replacement set will cost you dearly particularly in an unhealthy air environment. Something you need to seriously consider as the recurring fees will keep on coming. If you want to max out on the CADR performance, the whirring fan noise can be distracting when you leave it at full blast. Overall, if you are staying in a single-floor home or studio room with limited partitions, it is no brainer to invest in Medify Air MA-112 air purifier for a lifetime of clean air.

In short: The top-of-the-line Medify H13 air purifier with the highest CADR ratings and price tag. Look out for the recurring filter cost as well. ⚠️ Buy this if you want the best CADR and can afford to maintain one.

online price (US)**
±595.00 $$$$/ 7

(annual filter cost ±278-417)


The best comes from Sweden and Blueair is the key to unlock everlasting clean air. Blueair Classic 605 air purifier is nothing short of amazing when it comes to clean air delivery rate. This white powder-coated machine host a series of HEPA air filtration that you will not find elsewhere. At a large 20 x 26 x 13 inches in dimension and a 35 lb weight, its simplistic approach blends well in the modern exterior but at the cost of space and movability. You will have to hard time moving it around even with the 4 durable casters to support it. It is essentially a set it and leave it type of air purifier.

A HEPASilent air purifier that gives you more than just high CADR ratings. The high price tag and maintenance fees will limit its appearance.

With a slight learning curve, Blueair 605 is easy to use once the Wi-Fi setup is completed. There are 3 buttons at the top: the fan speed, filter reset button, and Wi-Fi button. The Wi-Fi button allows remote access via phone pairing for advanced function and remote access. By downloading the Blue Friend app at iTunes or Play store, you can use your smartphone to control the fan speed, LED light, child lock, or set up night mode in any part of the world. There is also a scheduler to help manage Blueair 605 operational hours and other useful information to help you achieve the pinnacle of clean air. For those that prefer the conventional method, you can also turn on/ off and set the fan speed of Blueair physically via the control panel. Overall, build quality is exceptional that guarantees no off-gassing from its eco-friendly materials. The 5 years warranty will give you a deservingly peace of mind throughout the course of ownership.

Here are Blueair 605 key specification:

  • Air filtration - HEPASilent Technology with Particle Filters and SmokeStop Filter
  • Room coverage - 775 sq. ft.
  • Dust CADR - 500 cfm
  • Pollen CADR - 640 cfm
  • Smoke CADR - 500 cfm
  • Warranty - 5 years

An official AHAM verified model, Blueair 605 can quickly clean the air in a room with CADR ratings of 500 cfm for dust, 640 cfm for pollen, and 500 cfm for smoke. Far greater than majority of the air cleaners in its class. Airflow delivery rate tally with the CADR at a max 650 cfm and large room size equivalent of up to 775 square footage. You can use it as a whole-room air purifier in a single storey home, apartment, condo, and offices with doors wide open. Noise level is surprisingly livable even with the strong airflow output. Blueair 605 only generates a low 23 decibels when running at the lowest speed to a normal conversation 62 decibels at max speed. Far more efficiency than MA-112 and Blueair Pro series counterpart. The same goes with the power consumption, anticipate a low 15 wattage hourly to a reasonable 100 watts when it is set to max.

Blueair 605 CADR Air Purifier Review

With the strong CADR, no airborne particles will be able to get away from Blueair trademark electrostatic and mechanical filtration. First, the drawn-in air will be electrically charged in the encapsulated particle-charging chamber. This allow the charged particles to be more adhesive to the gradient structure particles filter resulting in a 99.97% removal efficiency as small as 0.1 microns. This includes dust mites, mold spores, pollen, bacteria, and viruses. On top of it all, there is antibacterial polypropylene fibers coat that inhibits the growth of microorganisms. Very useful if you are living in a humid area that is notorious for creating a habitat for pathogens. Lastly, the SmokeStop Carbon filter neutralize toxic fumes, chemical smoke, and household odors including ozone. Every filter work as advertised and you will feel the changes in air quality in a matter of hours

Changing the tune, Blueair 605 has most of the drawbacks you would expect from a high CADR air purifier. Cumbersome for one as it is designed to be bulky to fit in the large fan motor and filters. The replacement filter will cost you between 230-460 dollars annually if you follow the exact interval timeline. The lack of auto mode is disappointing, but the expensive price tag is the biggest stumbling block for most people. Nonetheless, nothing is more valuable than your health and clean air is a big part of it. If Blueair 605 pricing doesn't cut it for you, downgrade to 405 or 205 series if you want something cheaper but with an identical specification.

In short: A HEPASilent air purifier that gives you more than just high CADR ratings. The high price tag and maintenance fees will limit its appearance. ⚠️ Buy this if you want the proven HEPASilent technology and best CADR performance Classic has to offer.

online price (US)**
±829.99 $$$$$$$/ 7

(annual filter cost ±230-460)


Forget about the M and L variant Blueair Pro XL is the best CADR air purifier you can get right now. This premium, niche air cleaning machine comes in at a tall 20 x 44 x 10 inches in dimension. While the size is still manageable, the 71 pounds weight limits badly on its versatility. Even with the carrying handle, you can forget about room-to-room purifying as it is too much effort to do so. you'll have to pick the right spot to place it so Blueair Pro can cover multiple places of air cleaning at one go. With the assuring 5 years warranty, build quality is outstanding with no signs of air escaping or poorly aligned case. After all, this is Sweden's best of the best.

Blueair Pro XL is the ultimate CADR purifier that almost nobody will buy. If you can afford one, this could be the smartest health decision you will ever make.

Blueair Pro XL is straightforward to use with the inclusion of the Air Intelligence Module. In auto mode, the air purifier will only run at higher fan speeds when indoor air quality is deteoriating. You can still use the manual 3 speeds mode but it is not necessarily at this point. A red filter light indicator will illuminate between 6 to 12 months when the trio filter requires replacing. Lastly, there is a dual air quality indicator that displays the air-suspended particles (PM2.5) and gaseous contaminants (GAS) levels. 1 green bar equals good indoor air quality while 3 bars (green, yellow, and red) equals unhealthy air quality level. Timer is the most notable missing feature but that hardly hamper the overall usability.

Here are Blueair Pro XL key specification:

  • Air Filtration - HEPASilent Technology with Blueair Pro Particle Filters and Pro SmokeStop Filter
  • Room Coverage - 1180 sq. ft.
  • Dust CADR - 950 cfm
  • Pollen CADR - 900 cfm
  • Smoke CADR - 800 cfm
  • Warranty - 5 years

Here's why Blueair Pro XL is the undisputed, best high CADR air purifier for residential and commercial use. It is tested by AHAM with the official CADR ratings of 950 cfm for dust, 900 cfm for pollen, and 800 cfm for smoke. The air purifier will promptly remove airborne pollutants before it has a chance to trigger your allergies. The German-engineered fans output a strong 990 cfm airflow distribution cater to 1,180 square footage of air cleaning coverage. Ideal for large room sizes like office, living room, nursery home, classroom, meeting hall, cafeteria, and study area. Noise levels can be subtle between 32 to 58 dB(A) despite the abundance of clean air delivery thanks to the sound dampening material. Energy usage is unavoidably high with up to 256 wattages hourly. Compared with models such as BreatheSmart, the power consumption is 3-4 times higher which will be reflected in your monthly bill. This is not the model you want it by the bedside.

Blueair Pro XL CADR Air Purifier Review

Here's where all the money goes to. Blueair Pro XL is the highest tier in its series so naturally, it comes with the best trio encapsulated particle-charging chamber setup. the ionizer electrostatically charges particles into the filtration. The charged particles will be more sticky to the V-shaped dense filter allowing the trio Pro3 Particle Filter to swiftly remove 99.97% of the biological pollutants as small as 0.1 microns including pet dander, mold, bacteria, and viruses. The trio Pro SmokeStop filter absorbs primarily chemical fumes and odors including radon, ammonia, CO, CO2, VOCs, ozone, and asbestos that is common in old buildings. As an extra layer of protection, the filter media is made from waterproof, natural antibacterial polypropylene fibers that inhibit mold and bacteria growth. Very important to curb down the reintroduction of germs into the air space.

Let's divert our attention to the common downsides of high CADR air purifiers. Blueair Pro XL is the biggest and heftiest air purifier here which heavily impacted its mobility. Although stable, the 32+ pounds weight can be a safety concern when you have children or pets playing near the machine. You also have to bear the 2,000+ dollar price tag and exuberance trio filter costs that can go as high as 1000+. Perhaps the biggest letdown is the lack of Wi-Fi support, remote control, and timer features at this price tag. That said, Blueair Pro XL is a very niche product that caters to those with severe respiratory issues. If your focus is getting the best CADR air cleaner, look no further.

In short: Blueair Pro XL is the ultimate CADR purifier that almost nobody will buy. If you can afford one, this could be the smartest health decision you will ever make. ⚠️ Buy this when money is no objection.

online price (US)**
±2,427.00 $$$$$$$/ 7

(annual filter cost ±540-1080)


A surprising entry to the CADR air purifier world, Gocheer GH-Monster is a modern, smart air purifier that is still somewhat accessible (under 600). The futuristic design and dual air intake setup come in at a 15.9 x 31.9 x 14.8 inches dimension size. Not too big for a high CADR air purifier but you will definitely feel its presence. Weight-wise, the 34.9 pounds weight is well supported by the integrated 360 degrees castor wheels and universal pulley. You will have no problem moving Gocheer GH-Monster around. Finishing up the exterior tour is the front vertical LED light that illuminates when the air purifier is turned on.

Pricey it may be, this could be the single H13 HEPA air purifier with high CADR you will ever need for your home.

Gocheer GH-Monster Smart air purifier is a powerhouse when it comes to usability. The glossy touch controls panel allows the easy operation of the 4 fan speeds, shut down timers, lighting dimmer, child lock, and filter reset. Child lock is a godsend for those with children at home and light dimmer clearly benefits from the deactivation of indicator light. With the built-in laser particle sensor, you can activate sleep mode and auto mode that automatically set the fan speed to high when a high concentration level of indoor airborne pollutants is detected. Another unique feature in Gocheer GH-Monster is the Wi-Fi smart app remote control. Just like Blueair 605, you can monitor and control the air purifier remotely via your smartphone or tablet. A convenient and seamless experience that can be done at a click of a button. On the whole, Gocheer GH-Monster 4-in-1 air purifier is very well put together for everyday use. It is also ETL/ UL listed, CARB approved, and asthma & allergy-friendly certified by the Asthma and Allergy Foundation of America.

Here are Gocheer GH-Monster key specification:

  • Air filtration - Pre-filter, Polypropylene pre-filter, H13 HEPA filter, Antibacterial cloth filter, Activated Carbon Filter
  • Room coverage - 2,500 sq. ft.
  • CADR - 1000 cfm
  • Warranty - 1-4 years

On paper, Gocheer GH-Monster is the best CADR air purifier you can get right now. It features an industry-leading 1000 cfm CADR that can swiftly remove airborne allergies before it causes any harm. Outrank even the greatest model such as Medify Air MA-112 and Blueair Pro XL. The dual suction covers 2,500 square footage of air cleaning space with 2 changes per hour/ 30 minutes. You can also increase the air changes frequency clean to 4 or every 15 minutes at a reduced 1,250 square footage. Ideal for living room, hospital, office, basement, studio apartment, or single-storey home as a whole-house air purifier. Noise output can be whisper-quiet if you run it in sleep mode at around 25 decibels but anticipate a more realistic 40 decibels on daily use. Power consumption is also decent at around 35% more energy-efficient over the same category models. A worthy consideration for those that count on every penny.

Gocheer GH-Monster Smart CADR Air Purifier Review

Double the filters, double the protection against airborne pollutants. Gocheer GH-Monster Smart air purifier 4/5 stage filtration will protect you from inhaling harmful allergens by swiftly capturing them. The twin washable, polypropylene pre-filter blocks pet hair, lint, fiber that would otherwise clog the H13 filter. The dual medical-grade HEPA filter capture 99.97% fine allergens as small as 0.3 microns from both direction. The antibacterial cloth filter reduces the growth and spread of mold spores, bacteria, viruses that have been captured by the HEPA filter. The charcoal-based activated carbon filter neutralizes chemical fumes like VOCs, asbestos, radon, ozone, cigarette smoke, and formaldehyde. Overall, the filtration grade is excellent but just slightly under par with Blueair offerings. Pairing with the high CADR, it will ensure a continuous flow of fresh air as long as Gocheer GH-Monster Smart is kept on.

Gocheer GH-Monster Smart might have every single premium feature available, it comes with a hefty price tag that can deter its accessibility. Besides the cost, you will have to account for the recurring dual filter maintenance fees that can go as high as 260 dollars in an unhealthy air environment. Unless you go for a third-party filter (not recommended) it will not run properly if you do not replace both sides of the filters. So if you are tight on budget or currently staying in a shared room, you might be better off with a smaller air purifier.

In short: Pricey it may be, this could be the single H13 HEPA air purifier with high CADR you will ever need for your home. ⚠️ Buy this or at least consider over BreatheSmart or GermGuardian AC9200WCA.

online price (US)**
±599.00 $$$$$$$/ 7

(annual filter cost ±129.99-260)


The controversial included in the list yet rightly so. LEVOIT Core 300 is a CGD 2019 award-winning air purifier that has excellent size to CADR ratio despite the weak output. Comes in at an affordable under 100 price tag, the small 8.7 inches diameter, 14.2 inches height, and 8.8 pounds weight makes it highly accessible and portable unlike other high CADR air purifiers here. You can place it high off the ground like the work desk, nightstand, cabinet to take advantage of the compact size. It is also the only air purifier that you can bring around wherever you go. Build quality is superb even though you are paying only a fraction of what other CADR air purifiers here cost. complemented by the California-based customer service support and a long 5 years warranty.

For just a shy of 100 bucks, Levoit Core 300 is the perfect start air purifier for those that need a small air purifier with reasonable CADR output.

Continue with the touch controls. Levoit Core 300 ozone-free (CARB compliant) means functionality is simple and easy to get the grip on. You can manage the airflow via the 3 fan speeds or choose the manual sleep mode ready for night use. There is also 2, 4, 6 8 hours timer option that you can choose when to turn off the machine. The child lock button allows you to lock the controls to prevent anyone from meddling with the setting. The light off button will turn off all indicator lights to reduce eye glaring at night. Lastly, the Filter reset button reminds you to change the filter every 6 months. A relatively short lifespan but understandably so given the smaller filter size.

Besides the smaller presence, Another advantage of the Levoit Core 300 True HEPA air purifier is the silent operation averaging at only 24 decibels noise. Even at max speed, the noise output will not exceed 50 decibels breaking point. Perfectly usable for work, relaxation, and sleep that should cover most household activities. Again, you can manually select Sleep mode to keep the noise level down. Power consumption is equally efficient to at only 45 watts hourly. Unlike the rest of the CADR air cleaners here, Energy Star Core 300 will not burden your electrical bill regardless of how you use it.

Looking into the basic specification of LEVOIT Core 300:

  • Air filtration - Pre-filter, H13 True HEPA filter, High-Efficiency Activated Carbon Filter
  • Room coverage - 219 sq. ft.
  • Dust CADR - 140 cfm
  • Pollen CADR - 145 cfm
  • Smoke CADR - 141 cfm
  • Warranty - 2 years

Here's where the big gap between the rest of the high CADR air purifiers here. LEVOIT Core 300 Vortexair Technology outputs a consistent airflow circulation that is optimized for small room sizes. The official clean air delivery rate stands at 140 cfm for dust, 145 cfm for pollen, and 141 cfm for smoke. Far from outstanding but it will serve its purpose well. At full speed, the air purifier will distribute clean air of up to 219 square footage at 5 air changes per hour. Ideal for close-range use with limited room spaces such as bedroom, office cubicle, dorm room, small basement, and attic. You can even place multiple air purifiers in a home without having any issue of the air cleaning overlapping.

Despite the smaller form factor, Levoit Core 300 comes with complete mechanical filtration to support its clean air delivery rate. The initial pre-filter traps dust, hair, lint, the debris and protect the HEPA filter from being clogged by the large particulates. The imported true HEPA filter captures microscopic particles as small as 0.3 microns like mold spore, mildew, pollen, fungi, and germs in the air. The granular activated carbon filter removes nearby smoke and odors via its chemical adsorption. Surprisingly, there is even space left to include one of the 3 upgradable filters from Pet Allergy, Toxin Absorber, and MB Filter. Pet Allergy is effective in removing pet dander, odors, diapers, and cooking smells. Toxin Absorber Filter focus on neutralizing chemical fumes from cigarettes, vehicle exhaust (CO), ammonia, radon, and VOCs. MB Filter anti-microbial element impedes microorganism growth and is our preferred choice.

As we alluded to earlier, Levoit Core 300 is not exactly a high CADR model that max out at only 145 cubic feet per minute. It is quite the opposite at around 7 times less of what Gocheer GH-Monster Smart air cleaner CADR is outputting. Nonetheless, the weaker airflow does drive the price down including the filter recurring cost. Adding the portable form factor into the book, this is undoubtedly the perfect starter air purifier for you to try out before investing in a full-blown CADR air purifier.

In short: For just a shy of 100 bucks, Levoit Core 300 is the perfect start air purifier for those that need a small air purifier with reasonable CADR output. ⚠️ Buy this if you want a budget, compact HEPA air cleaning machine for desktop and bedside use.

online price (US)**
±99.99 $$/ 7

(annual filter cost ±20-40)



What Is CADR And Why Is It Important

CADR or Clean Air Delivery Rate is a metric developed by AHAM to measure the air purifier's cleaning performance. The CADR rating is based on the volume of clean air produced in cubic feet per minute (cfm) or cubic meter per hour (m³/h). Three types of particles will be tested (dust, pollen, smoke) with individually assigned CADR scores. Dust CADR represents medium particles, Pollen CADR represents coarse particles and Smoke CADR represents tiny particles. CADR is important because it gives you an indication of whether an air purifier has the capacity to effectively clean your room. The higher the CADR ratings, the faster an air purifier can clean the air.

How Is CADR Tested

The Association of Home Appliance Manufacturers (AHAM) developed the ANSI/AHAM Standard AC-1 procedure for testing. Running at the highest fan speed, the air purifier is put into a 1,008 cubic feet test chamber to measure the efficiency it can remove the following three sizes of particles in the air:

  • Dust particles between 0.5-3 micron
  • Pollen particles between 5-11 micron
  • Smoke particles between 0.09-0.1 micron

3 independent tests will be performed and rated on how well an air purifier cleans indoor air. With CADR ratings, you can calculate the recommended room size an air purifier can cover. Note that AHAM will randomly select an air purifier for independent testing to ensure the selected model met the airflow performance levels.

What Are The Benefits Of CADR

The benefit of a CADR rating is it gives the consumer a standardized metric to compare air purifiers' airflow and filtration efficiency. It prevents manufacturers from coming out with their own benchmark testing and misled the consumers through disingenuous marketing. For example. some manufacturers will use particle counters to manipulate a favorable air cleaning efficiency for their air purifiers without accounting for other important data.

What Are CADR Limitations?

CADR rating is a good benchmark for comparing air purifiers but it does not paint the complete picture. Here are CADR known limitations:

  • The test primarily focuses on particles as opposed to gases.
  • The test is conducted on the highest fan speed without factoring in the noise level.
  • The CADR is tested with a new, clean filter that does not reflect the actual filter media condition and the performance of the air purifier over time.
  • CADR does not account for the other type of filtration efficiencies such as ionizer and UV-light.
  • AHAM testing and CADR rating are not mandatory programs therefore not all manufacturers will participate in the test.
  • The test also does not measure any ozone generated, build quality (including motor), energy usage, and filters media size.

When Should I Place A CADR Air Purifier?

Given most CADR air purifiers are powerful enough to cover an entire home, you should place the air cleaner in the middle of a room or by the doorway. Just remember to leave 2-4 feet of space away from the wall for maximum airflow circulation and avoid placing it next to electronic devices or underneath a window.

How Much Does A CADR Air Purifier Cost?

A top-tier CADR air purifier is very expensive and will cost you between $300-2400 dollars depending on filtration depth, filter size, and airflow delivery performance. If you are living in a small abode e.g. a studio, apartment, or dorm, we highly recommend you start with Levoit Core 300 that is only under 100 dollars and slowly make your way to the top of the chain based on your needs.

Is CADR Air Purifier Safe And Effective?

CADR air purifier is very safe as it uses primarily mechanical filtration to clean the air without producing harmful byproducts. Mechanical filters i.e. pre-filter, HEPA filter, carbon filter are also very effective in removing high concentrations of allergen, tiny particles, smoke, and odors compared with UV light, ionization technology. You can safely use it 24/ 7 even with pets and children around the house.

How To Choose The Right Size CADR Air Purifier?

Even though most CADR air purifiers come with powerful airflow circulation, you should pick the right size model that can be fitted in your room and converse energy. The first step is to measure the room size you intend to place the air purifier. For example, if the room size is measured at 300 square footage, get an air purifier that can support at least 300 square footage at 2 air changes per hour. If you are unsure about the specification, you can get the air purifier's recommended room size from the manufacturer itself or use AHAM’s 2/3 CADR calculation guideline.

How Much Energy Does A CADR Air Purifier Use?

On average, a CADR air purifier will consume 45 watts of energy per hour. The energy cost is estimated at around 4-7 dollars monthly based on $0.15 per kilowatt-hour with 12 hours of runtime and 48 to 84 dollars yearly. Note that the power consumption varies on the model and also fan speed the air cleaner is constantly running. For example, Blueair Pro XL power usage peaks at 256 watts while Alen BreatheSmart 75i peaks at 45 watts.

Final Thoughts

Getting a high CADR air purifier is a long-term investment that will pay dividends to your health. To recap, GermGuardian AC9200WCA is a "budget" CADR air purifier choice despite costing over 300. Consider Alen BreatheSmart 75i or Medify Air MA-112 if you want a performance-oriented air purifier instead. For those with asthma or hypersensitivity, visit our best asthma air purifier page for a more in-depth review and comparison.

2022 Best High CADR Air Purifier

NoImageAir PurifierOnline Price (Amazon)CADR (DUST/ POLLEN/ SMOKE)HIGHLIGHTSFiltrationCoverage
1GermGuardian AC9200WCA Air Purifier ReviewGermGuardian AC9200WCA Air Purifier


310 cfm/ 346 cfm/ 244 cfmBEST BUDGET5-stage378 sq. ft. (35 m2)
2Alen BreatheSmart 75i Air Purifier ReviewAlen BreatheSmart 75i Air Purifier


347 cfm/ 347 cfm/ 347 cfmBEST OVERALL3-stage1,300 sq. ft. (121 m2)
3Medify Air MA-112 Air Purifier ReviewMedify Air MA-112 Air Purifier


950 cfm/ 950 cfm/ 950 cfmBEST PERFORMANCE4-stage2,500 sq. ft. (232 m2)
4Blueair Classic 605 Air Purifier ReviewBlueair 605 Air Purifier


500 cfm/ 640 cfm/ 500 cfmSINGLE PRO PARTICLE FILTER3-stage775 sq. ft. (72 m2)
5Blueair Pro XL Air Purifier ReviewBlueair Pro XL Air Purifier


950 cfm/ 900 cfm/ 800 cfmTRIO PRO PARTICLE FILTERS3-stage1180 sq. ft. (110 m2)
6Gocheer GH-Monster 4-in-1 H13 Smart Air Purifier ReviewGocheer GH-Monster Smart Air Purifier


1000 cfmMONSTER PERFORMANCE4-stage2,500 sq. ft. (232 m2)
7Levoit Core 300 True HEPA Air Purifier ReviewLEVOIT Core 300 Air Purifier


140 cfm/ 145 cfm/ 141 cfmTHE STARTER CHOICE3-stage219 sq. ft. (20 m2)

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.