The market is flooded with air purifiers, and sometimes, as a consumer, it isn’t easy to decide which product is best for you.

A competitive price should be the least important parameter when deciding on which air purifier to buy. Although not everyone can afford the expensive options, it’s worth noting that cheaper options often don’t achieve the desired standards and may be little more than decorative objects in your home.

In this article, I will review a selection of, what I consider to be, the best air purifiers for larger rooms. My selection is primarily based on the devices that perform most effectively. I only consider parameters related to performance and efficiency in eliminating different groups of contaminants. I did not evaluate them based on their aesthetic qualities.

I have also included two other more affordable options and perform better than most of their competitors.

First, I will detail the parameters I followed when curating the list.

CADR: Clean air delivery rate. This is based on the fraction of particles removed from the air and multiplied by the airflow rate through the device.

It’s important to know that many devices that only contain a HEPA filter will have higher CADR rates. In devices with a single filtration mesh, the airflow through the device is higher. Still, the efficacy of filtrating some pollutants, such as small particles and gases, might be lower than multistage filtration devices.

Room coverage: Large and extra-large room air purifiers filtrate more effectively than devices made for smaller areas. Devices designed to cover large areas have bigger absorption capacities and exchange higher volumes of air compared to purifiers designed for smaller rooms.

Combination of filters: Air purifiers that combine two or more technologies, such as a HEPA filter with a polyweb filter, or an activated carbon filter with an electrostatic filter, are more efficient than those with only one filter.

Filter combinations increase the range of contaminants filtered by the device. The more filtration layers a purifier has, the lower the airflow. Although models with multiple layers and a high CADR are difficult to find, they are the most efficient air filters on the market.

Contaminants filtered by the device: Usually, this depends on the number of filtration layers. It is preferable to install devices that filter a wide range of pollutants.

Tested by a third-party lab: Companies that show third-party lab test results and prove the performance of their filters are more reliable. This test considers the most important parameters in a filter. It has high standards, such as determining CADR after one hour of use and the independent group of contaminants that the filter removes.

Ozone emission: Ozone emissions related to purifiers is a controversial topic. It’s important to know that Ozone is still one of the best purification technologies nowadays, especially for air conditioning and heating systems. However, ozone should be used in empty spaces since it can be harmful in high doses.

Warranty: Good warranty terms guarantee that devices perform well over time, are durable, and help secure your investment.

Here is the list of purifiers I consider to be the best in the industry now:

1-Carico Nutri Tech Deluxe Air Purifier

Carico Nutri Tech Air Purifiers have participated in the industry for over 20 years. They are not as well-known as other filters because they aren’t sold online like other premium American products. You can acquire one of these systems by contacting the Carico International Inc. offices directly or ordering from an authorized distributor.

Carico International Inc. purifiers have unique features that include medical-grade certified air filters that make them one of the best large room air purifiers available.

CADR standard: 507 CFM

CADR particulate of 299 CFM

-Room coverage: 2300 square feet

-Ozone emission without active ionizer: 0

Filtration stages: 8 stages + 2 optional stages (ionization and deodorizer are optional, usually used for deep sanitizing in empty spaces.)

For home use, use 8 filtration stages and set the ionizer once or twice per month to disinfect the house when people are not inside.

Filter combinations: True HEPA 13, activated carbon filter, antimicrobial filter, polyweb electrostatic filter, woven polyester filter, Puratech filter, micro-grip tackified filter, and the Ultra-Purification GWM-X filter.

Effective for: particulate matter such as dust, mold, pollen, viruses, bacteria, VOCs, gases, pet dander, hair, cigarette smoke, carbon dioxide, asbestos, spores, and cooking odors.

Warranty: 10 years limited warranty + lifetime hazard warranty

-Cartridge lifespan: 1 year

Certified performance:  The Nutri Tech Deluxe Air Purifier has been tested by third-party labs to guarantee its optimal performance. Additionally, Nutri Tech Deluxe was tested for removing the COVID-19 virus, removing 89% of COVID-19 in the first filtration process.

2-IQ Air HealthPro Plus

This is also a medical-grade certified device. IQ Air is a Switch company specialized in air purifiers. It is perhaps not the most well-known company for air filters in the United States; however, their purifiers are undoubtedly among the best quality in the market, especially this model. 

 CADR particulate: 300 CFM

Room coverage: 1125 square feet

Filters: PreMax filter, granulated activated carbon filter, pelletized chemisorption filter, and a hyper HEPA filter. Swiss-made advanced tech, which also includes triple-seal tech, and an EvenFlow Diffuser.

Ozone emission: 0

Filtration stages: 4 stages

Effective for: particulate matter such as dust, mold, pollen, viruses, bacteria, VOCs, gases, pet dander, hair, cigarette smoke, carbon dioxide, asbestos, spores, and ultrafine particles smaller than 0.1 microns.

Warranty: 10 years

Cartridge lifespan: 1 year

Certified performance: Excellent airborne particle removal. Tested and certified with a third-party lab: filters 99.5% of harmful ultrafine pollution particles down to 0.003 microns in size.

The company also tests every unit to ensure 99.97% cleaner air or better.

3-Blueair Pro XL  

BlueAir is one of the most reputable air filter manufacturers in the United States. They have a wide variety of filters; however, this one is interesting because it falls within the purifiers category suitable for servicing large rooms and is considered a premium filter.

CADR standard: 450 CFM

*It’s worth clarifying that even though the CADR is higher than the previous examples, the results don’t necessarily mean that it provides a better filtration rate. This filter has a better maximum airflow because it has fewer filtration layers.

Room coverage: 1180 square feet

Ozone emission: Not specified.

Filters: HEPASilent + DualProtection that can be upgraded to a SmokeStop filter for higher odor removal.

The company states that the HEPASilent filter removes 99.97% of particles of 0.1 microns in size. This is an outstanding result; however, there is reason to question whether it has a true HEPA filter (not stated in the air profile). Particles of 0.1 microns, or smaller, are easier to trap than particles of 0,3 microns. 0,3 microns is the optimal size to corroborate the efficacy of a HEPA filter.

Filtration stages: Not specified.

Effective for: gases, VOCs, odor removal, cigarette smoke, particulate matter including dust, mold, pollen, microplastic, pet dander, small particles of 0.1 microns, bacteria, and viruses. It was not tested for the elimination of COVID-19.

Effective for allergen and germ removal in extra-large open areas.

Warranty: 5 years

Cartridge lifespan: 6 months

Certified performance: AHAM verified.

4-Alen BreatheSmart 75i Air Purifier        

Alen is an air purifier manufacturer based in Texas. They produce high-quality products that deserve to be included in this list.

Room coverage: 1300 square feet

CADR standard: 350 CFM

Ozone emission: Ozone safe

Ozone emission: 0 with ionizer off. It has an optional ionizer for empty rooms.

Filter: True HEPA (H13)

The company allows you to choose one of their filter options:

-Pure filter (True HEPA that captures allergens, dust, mold, germs, and bacteria)

-Fresh filter (True HEPA captures allergens, dust, mold, germs, bacteria, cooking odors, smoke, and VOCs)

-Filter Pet (True HEPA filter that captures allergens, such as dust, mold, germs, bacteria, pet dander, and pet odor)

The differences between one filter and the other are not specified.

Effective for: Depends on the chosen filter.

Warranty: Lifetime warranty

Cartridge lifespan: 1 year

Filtration stages: Not specified.

Certified performance: Not specified.

Unfortunately, this air filter doesn’t combine multiple filtration technologies, but it’s still a good choice at a more affordable price.

5-Coway Airmega 400

Although this device is not as effective as the previous options and is not ideal for large rooms, it is an affordable and good option. To its credit, it offers real-time air monitoring, which is advantageous.

Room coverage: 1560 square feet

CADR standard: 350 CFM

Ozone emission: 0

Filters: 2 washable prefilters, two Max2 HEPA filters, and an activated carbon filter.

Effective for: smoke, pollen, dust, viruses (testing for the elimination of COVID-19 not specified), mold, tobacco smoke, bacteria, food smell, smoke, gases, pet odors, and VOCs.

Filtration stages:  4 stages

Warranty: 1 year for any internal parts and 5 years for the motor and electronic parts.

Cartridge lifespan: 1 year

Certified performance: Not specified.

This device is only available in the United States.

After much research, these air purifiers were found to be the best performing devices in the industry. Regardless of some minor disadvantages, all of them fulfill the task of filtrating your air and helping you stay free of indoor pollutants.

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