Last updated on April 23rd, 2022

Coway and Alen air purifiers differ in size, capabilities and price. It’s hard to select one of them and proclaim it a “winner”: before you do it you have to know for what purposes do you need an air cleaner. Is it because you have an allergy? Or is it because you live in a polluted area and you want to breathe clean and fresh air at home? Do you need auto function in an air purifier or you’re fine manual controls.

There are a lot of questions like this and I’m here to help you out. In this comparison I’m going to compare different air purifiers in the same price category manufactured by the Korean company Coway and the US-based (although production facilities located in China) company called Alen.

Key Takeaways

But before we go into model-to-model comparison, let’s take a look at the crucial differences between both companies that apply to all their air purifying units:

  • Coway manufactures air purifiers in the Republic of Korea, Alen in China
  • Alen has 60-days money back if the appliance is bought in their store
  • Coway air purifiers are cheaper, so you can expect the same performance levels for the smaller price
  • However, filters aren’t that sturdy and are generally run out of their air cleaning capabilities faster compared to the Alen’s
  • Alen sells custom HEPA filters, designed to target pollutants like smoke, allergens, dust, etc., so it’s possible to get the one you need in your specific situation. On the other hand, Coway air filters are more of a general use
  • Alen has a warranty period of 1 year for all their air purifiers whilst Coway usually offers 3-year warranty
  • Alen offers subscription for the filters delivery for 10% off. In addition, subscribers receive lifetime warranty on their air purifiers

Now that we have dealt with general differences let’s head over to the differences between the individual models. But before we go I want to point out the last thing: air changes per hour which you are going to encounter all the time in this comparison tables.

Air changes per hour – or ACH – mean how often the air is cleaned in one hour. This is a very relevant metric for people that have any breathing conditions, including asthma, allergies and so on. At a minimum rate, an air purifier has to be able to reach 4 ACH per hour to be considered effective in any way. For people who doesn’t have any health issues, this number goes down. I recommend visit the page ACH calculator & recommendations to get more familiar with it.

Enough talking, let’s see how Alen compares to Coway air purifiers!

Alen BreatheSmart 75i vs Coway Airmega 400

Model Alen BreatheSmart 75i Airmega 400
Image Alen BreatheSmart 75i vs Coway Airmega 400 Coway Airmega 400 vs Alen BreatheSmart 75i
Reason to Buy Filter Selection, WiFi Lower Price
Filter Life 12 months 12 months
Replacement Filter Check price Check price
Room Coverage (4 ACH) 651 sq. ft. 651 sq. ft.
CADR 347 CFM 350 CFM
Noise Level 25 – 49 dB 22 – 55 dB
Power Consumption 1.8 – 45 Watt 6.2 – 66 Watt
Weight 27 pounds 24.7 pounds
Dimensions (L x W x H) 11.5″ x 18.5″ x 27″ 14.8″ x 14.8 x 22.8″
Price Under $750 Under $650
Review More Specs & Review

As you can see from the table above, the reason why you prefer the Alen BreatheSmart 75i is the ability to control the air purifier with your smartphone via WiFi and also an ability to select one out of 4 (Pure, Fresh, Pet, or Heavy Odor) air filters designed to deal with specific kind of harmful particles. The Coway Airmega 400 also has a WiFi enabled model, I explain the difference the basic and WiFi models here.

Alen BreatheSmart 45i vs Coway Airmega 300s

Model BreatheSmart 45i Airmega 300s
Image Alen BreatheSmart 45i vs Coway Airmega 300s Coway Airmega 300S vs BreatheSmart 45i
Reason to Buy Filter Selection, Lower Price Larger Coverage
Filter Life 12 months 12 months
Replacement Filter Check price Check price
Room Coverage (4 ACH) 460 sq. ft. 490 sq. ft.
CADR 245 CFM 260 CFM
Noise Level 23 – 49 dB  28 – 52 dB
Power Consumption 1.1 – 50 Watt 6.2 – 57 Watt
Weight 15 pounds 21.4 pounds
Dimensions (L x W x H) 8.5″ x 15″ x 25″ 13.6″ x 13.6″ x 20.9″
Price Under $450 Under $600
Review Specs & Review

The Coway Airmega has a larger room coverage due to higher airflow, but overall it doesn’t have much to offer when compared to the Alen Breathesmart 45i. the latter is also has a lower price tag.

Alen BreatheSmart Classic vs Coway Airmega 400

Model BreatheSmart Classic Airmega 400
Image Alen BreatheSmart Classic vs Coway Airmega 400 Coway Airmega 400 vs Alen BreatheSmart Classic
Reason to Buy Filter Selection Larger Coverage
Filter Life 12 months 12 months
Replacement Filter Check price Check price
Room Coverage (4 ACH) 560 sq. ft. 651 sq. ft.
CADR 300 CFM 350 CFM
Noise Level 42 – 56 dB 22 – 55 dB
Power Consumption 1.6 – 105 Watt 6.2 – 66 Watt
Weight 21 pounds 24.7 pounds
Dimensions (L x W x H) 10″ x 17.75″ x 26.75″ 14.8″ x 14.8 x 22.8″
Price Under $650 Under $650
Review Specs & Review

Alen BreatheSmart FIT50 vs Coway Airmega 250s

Model BreatheSmart FIT50
Image Alen Breathesmart FIT50 air purifier review Coway Airmega 250S vs BreatheSmart FIT50
Reason to Buy Filter Selection Lower Price, WiFi
Filter Life 12 months  12 months
Replacement Filter Check price Check price
Room Coverage (4 ACH) 410 sq. ft. 465 sq. ft.
CADR 220 CFM 230 – 261 CFM
Noise Level 32 – 49 dB 22 – 54 dB
Power Consumption 1.2 – 60 Watt 64 Watt
Weight  16 pounds 20.5 pounds
Dimensions (L x W x H) 10″ x 16.75″ x 22.25″ 8.3″ x 18.5″ x 19.7″
Price Under $550 Under $400

Alen BreatheSmart Flex vs Coway Airmega AP-1512HH

Model BreatheSmart Flex Airmega AP-1512HH
Image Alen BreatheSmart FLEX vs Airmega AP-1512HH Coway AP-1512HH vs BreatheSmart Flex
Reason to Buy Filter Selection, Lifespan Lower Price, Coverage
Filter Life 12 months 6 months
Replacement Filter Check price Check price
Room Coverage (4 ACH) 420 sq. ft. 460 sq. ft.
CADR 225 CFM 246 CFM
Noise Level 38 – 55 dB  24 – 54 dB
Power Consumption 0.8 – 56 Watt 4.9 – 77.8 Watt
Weight 15 pounds 12 pounds
Dimensions (L x W x H) 8.5″ x 15″ x 25″ 9.6″ x 16.8″ x 18.3″
Price Under $350 Under $300
Review Specs & Review

Hopefully, this Coway vs Alen air purifiers comparison will help you pick an air cleaner that fits your room and needs.

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