Best Large Room Air Purifier

Best Large Room Air Purifier – To find the best large room air purifiers, you’ll need to examine a list of criteria to determine what is most important. We recommend the best large room air purifiers with a minimum 3-stage filtration system, which combines a pre-filter for large particles, a true HEPA filter for ultrafine particles, and a combination of the activated carbon layer and ionizer for smoke and odors.

We are big fans of healthy digital controls that include sleep mode, auto mode (fan speed adjustment), and real-time air quality updates. These are some of the features that make up the highly-rated air purifiers.


1.Medify MA-112

The main advantage is the advanced H13 HEPA filters. If you look at the filter-by-filter, the Medify MA-112 3-filter system doesn’t look all that extraordinary; pre-filter, activated carbon filter, and HEPA filter are all there.

However, the main filter – HEPA filter – is not a standard HEPA filter (H10-H12, 99.7%, 0.3-micron specs). Medify uses the H13 filter; capable of removing 99.9% indoor air pollutants with 0.1-microns in size. This is the kind of filter that is used in hospital settings to maximize indoor air quality.

Pros & Cons

2.Alen 75i

If you look at the Alen BreatheSmart 75i specification, you can see how outstandingly well-balanced numbers it has. First of all, it has a big 350 CADR rating with 347 CFM maximal airflow; an almost 1:1 perfect ratio.

It has a coverage area of 1300 sq ft at 2 ACH, and 520 sq ft at 5 ACH. You can pretty much use it in any room between these two square footages. It’s not an extra-large room air purifier; it’s the essence of an air purifier for a large room.

Pros & Cons

3.Blueair Classic 680i

Blueair, in general, is one of the most reliable and beloved Swedish brands of air purifiers. The Blueair Classic 680i has pretty much everything you would wish for in a 1,000 sq ft room air purifier. At 2 ACH, has a 1745 sq ft coverage area, and a 698 sq ft coverage area at 5 ACH. That makes it about 40% bigger than the Alen BreatheSmart 75i.

It has air quality sensors that monitor indoor air quality. That’s the requirement for Auto Mode; a setting that automatically adjusts the fan speed setting to capture as much air pollutants as it’s currently required to either maintain or improve air quality.

Pros & Cons

Most Honorable Mentions in the post

4.IQAir HealthPro

Its filtration system makes it very medical-friendly. It has special and exclusive HyperHEPA air filters that can filter out incredibly small particles. HEPA filters can capture 0.3-micron particles; HyperHEPA can capture 0.003-micron particles. That’s 100x better than a HEPA filter.

Due to the HyperHEPA filtration system, the IQAir HealthPro Plus is usually rated as the best air purifier for allergies.

Pros & Cons

5.Coway Airmega 400

The performance Coway Airmega 400 Smart displays has to do with two things: powerful 340 CFM airflow and, even more importantly, the Max2 HEPA filters that ramp up the CADR rating to 350. Coway Airmega 400 Smart is the only large area air purifier besides the Alen BreatheSmart 75i that has a bigger CADR rating than the airflow.

In translation, that means it’s exceptionally efficient at removing air pollutants such as smoke, pollen, dust in the recommended coverage area. With 1560 sq ft at 2 ACH and 624 sq ft at 5 ACH, the Coway Airmega 400 Smart has an ample coverage area that can cover even the very large rooms.

Pros & Cons

6.Honeywell HPA300

Honeywell HPA300 is the best Honeywell air purifier. However, compared to the top-rated large room air purifiers, the Honeywell HPA300 is painfully ordinary.

It has a decent 1163 sq ft coverage area at 2 ACH and 465 sq ft at 5 ACH, thanks to the 320 CADR rating. But that’s pretty much it.

Honeywell HPA300 uses an ordinary True Hepa filter, pre-filter, and activated carbon filter. It does a decent job in a large room but it’s nothing to brag about.

Pros & Cons

7.Molekule Air Pro -PECO Filter

The NASA-level PECO filtration technology. Instead of using the standard HEPA-based filtration system, all Molekule air purifiers use PECO filters that use photoelectric catalytic oxidation to destroy air pollutants. The additional benefit of that is the often disputed inactivation or destruction of certain bacteria and viruses.

Molekule Air PRO is the biggest Molekule air purifier with a 1000 sq ft coverage area at 2 ACH. Due to the novel filtration system, we don’t have max. airflow or CADR rating specifications.

Pros & Cons


Best Large Room Air Purifier – This best air purifier for allergies comes with three filtration layers, including a pre-filter for large particles, a true HEPA filter for ultrafine particles (e.g. airborne pollutants), and an activated carbon filter for smoke, odors, and gases.

One unique feature with this large room, an air purifier is its option to use three replacement filters (labeled original for multi-purpose, pet allergy, and toxin absorber), which serve different purposes based on your situation.

Air Purifier