Coway AP-0512NH Air Purifier: Trusted Review & Specs

Before the Coway AP-1512HH had become the standard for any low-range air purifier, we had a smaller unit named the Coway AP-0512NH. The device, which is both smaller and weaker, has its own traits that make it deserve a place beside its big brother. Finally, we have a testing unit to make a proper Coway AP-0512NH Review for you.

However, the Coway AP-0512NH is discontinued, so we recommend you look for the Coway Airmega 150 instead.

Coway AP-0512NH ranks B- in our air purifier ranking list. We give the biggest and most thorough database of air purifier reviews in the world.

Update: The Airmega 150 and Airmega 160 are perfect alternatives to this air purifier, with higher fan power and a better air filter. Additionally, as the Coway AP-0512NH appears to be fully sold out, I recommend properly checking our deal before reading this review, as the review itself is pretty lengthy.

In Breathe Quality, we have reviewed all air purifiers under these sections. Also, we guarantee that:

  • We provide honest reviews (both pros and cons) so that everyone can make the best decisions.
  • We do not (and never) exaggerate one product just to let you click the links and buy that product blindly.


coway ap-0512nh review

  • Great True HEPA filter
  • The Soothing Sound is amazing

  • The color is quite cheap
  • The fan power is too weak
  • No Eco Mode
  • Discontinued

Coway has marked the 30-year milestone as a symbol of air purifying technology in Korea and all over the world. The United States is the top targeted market for every product of this company, and that’s why you can trust its customer service. The last thing we need to know is the quality of this air purifier, and let’s find out in our Coway AP-0512NH Review.

Other Coway’s Air Purifier Reviews:

Coway AP-0512NH Price

It is indeed cheaper than the Coway-AP1512HH and/or Airmega 200M, but by how much? The Coway AP-0512NH is the baby brother to Coway’s famous air purifier. To do that, Coway reduces the stage in this air purifier’s air filtration process, cuts down the size, and even cuts the fan power. As a result, the Coway AP-0512NH is not a solid contender for the price.

The official price on the Coway website for this Coway AP-0512NH is $197, but with a great Amazon deal from us, you can check a much lower price below. The Coway AP-0512NH is now discontinued. So we should recommend that you get the Airmega 150 or Airmega 160 instead.

Just a few years ago, the arch-rival of Coway – Winix, released lots of air purifiers to become the top leader of the low-range segment. Its three consecutive devices, the Winix 5300-2Winix C535 and Winix 5500-2, are all the most popular options for around $150. With great commercial success and actually innovative power, the Coway AP-1512HH established a solid foothold in the budget market for this brand, despite all the heated competition. However, it seems the Coway AP-0512NH cannot achieve as much success as its brother.

Even if you grab our deal and can buy this air purifier at a much lower price, and even if you can ignore these aforementioned Winix devices, you can’t pretend that you don’t notice other devices in the American region. Honeywell is that big brand, with its Honeywell HPA100 and Honeywell AirGenius 3 to win the budget market. Yes, with many other companies offering similar or better specs, you can see the success of the Coway AP-0512NH is far from guaranteed.

Today, the competition is even tougher, as the Levoit Core 400SLevoit Vital 200S and TCL Breeva A5 bombard too many lists of the best air purifiers. Guardian Technologies is ready to come back to the competition with its latest GermGuardian AP5800W.

Top Coway AP-0512NH deals right now

Coway AP-0512NH Sound Air Purifier (Covers up to 155 square feet).

The Coway 2-in-1 Air Purifier and White Noise Machine, with the specific 6 soothing sound to help you sleep better.

Related post: Best air purifier 2023.

Coway AP-0512NH Design and Size

My first impression when looking at the Coway AP-0512NH is “Woa, a similar device to the Coway-AP1512HH“. However, I quickly noticed that, though Coway never said it was their intention, the Coway AP-0512NH is just a “cheap” version. It shares much of the brother’s style, but grafts it onto a smaller (and, in my opinion, uglier) air purifier.

The “cheap” feeling is mostly from the aquamarine color of this device. It is pale and cheap, especially when combined with the plastic body of the Coway AP-0512NH.

But put this opinion aside, and you can see how similar the Coway AP-0512NH and its brother can be. You still have a plastic plate on the front to cover the air intake grill. On top of this air purifier, we can find the control panel and one outlet air grill, too.

With one Sound Therapy setting and the Volume functions, the control panel of this device will be full of buttons.

coway ap-0512nh review


The Coway AP-0512NH is a little bit smaller, with only 14.5 inches in height and 13.8 inches in width. That being said, it is only 9 lbs. and could be a great compact air purifier on any room’s nightstand. However, you can still find a more lightweight device, like the Honeywell HPA100 with only 7.7 lbs, or even the Levoit LV-H132 with just 6 lbs for a True HEPA air purifier.

Related post: Best air purifiers for bedroom.

Coway AP-0512NH Filters

High quality and air filter types are always the absolute metrics when determining the performance of one air purifier, yet marketing types have been keen for years to have the world believe that the more air filters, the better. And that’s a standard that the Coway AP-0512NH doesn’t come close to reaching.

  1. Pre-filter – The pre-filter of this Coway AP-0512NH has an attached Activated Carbon filter, which is capable of both dealing with large objects of pollutants and deodorizing.
  2. True HEPA filter – The True HEPA Filter can capture 99.97% of particles as small as 0.3 microns, including allergens, virus particles, pollen, mold, and fungi. It combines with bipolar ionizer technology to improve the performance.

For quality, the True HEPA filter from Coway products is the top class in the air purifier industry. Coway’s HEPA filters are certified to be able to remove 99.97% of particles as small as 0.3 microns. Moreover, the Coway AP-0512NH has a bipolar ionizer to ensure trapping efficiency. The only negative side is that the ionizer emits ozone, which can irritate asthma and other breathing issues. I have checked the ozone emission and believe that it is still under the standard set by the California Air Resources Board (CARB).

coway ap-0512nh review


The performance of this True HEPA filter is reflected by a common Breathe Quality test. This time, I chose the Honeywell HPA100 and Winix 5300-2. We run all these air purifiers in a room of 100 square feet for an hour. The result was that the Winix 5300-2 was the winner, with a high efficiency of 99.97% for any particle as small as 0.3 microns. Both the Honeywell HPA100 and Coway AP-0512NH share the same efficiency of 99.9%.

coway ap-0512nh review

So to say, the performance of the Coway AP-0512NH is quite decent, but it is enough to help you breathe more clean air. For the air filter, you need to change the True HEPA filter once per year, at a cost of $34. This cost is quite similar to the GermGuardian AC5350B and much better than the Winix 5300-2.

Related post: Best air purifiers for allergies.

Coway AP-0512NH Room Coverage

The 155 square feet, by the standard of most low-range air purifiers these days, may seem slightly paltry. After all, with only $50 more, the Coway AP-1512HH or Airmega 200M can cover exactly double the room coverage of this Coway AP-0512NH. But for this price, others like the GermGuardian AC5350B or Honeywell HPA100 aren’t much better. If you need an air purifier to clean such a large room, look for the Winix 5300-2 or SilverOnyx.

The ACH of Coway AP-0512NH is only 2X. For an air purifier with a small fan, the Coway AP-0512NH will exchange the air in your room every 30 minutes.

The CADR of Coway AP-0512NH is 122 Dust/ 110 Smoke/ 120 Pollen (cfm). The CADR rating is similar to the Honeywell HPA100, which means the Coway AP-0512NH is enough to clean a small room quickly.

Related post: Best large room air purifiers.

Coway AP-0512NH Sound

The Coway AP-0512NH is designed for bedrooms, and the sound is the unique selling point of this device. This is not about the noise level of this air purifier, but about the soothing sound function of the Coway AP-0512NH.

You can select from the 6 Sounds Therapy options: 3 nature sounds (rain, ocean, and cricket); 2 lullaby sounds from Schubert or Brahms; or just a plain white noise. Whatever you choose, these sounds will result in positive therapeutic effects on sleep problems. Remember that you can adjust the volume of these sounds to find the best fit for you.

With this feature, the Coway AP-0512NH is a great candidate for the best air purifier for bedroom, if not for the Coway AP-1512HH to take the throne.

Related post: Best air purifiers for baby.

Coway AP-0512NH Power Consumption

One of our most FAQs is “Do air purifiers use a lot of energy?” In fact, air purifiers must be used for a long time to be efficient. And power consumption is one important criterion for reviewing how much energy this air purifier will consume.

In my day-to-day use, I’ve found the power consumption of this Coway AP-0512NH to be about 52 watts. For a smaller device, this air purifier consumes much less energy than its big brother, which is 78 watts. However, the power consumption of this Coway AP-0512NH is just adequate. That is to say, we have better devices out there, with power consumption only half that of our Coway air purifier.

Just like any other air purifier in the Coway lineup, the Coway AP-0512NH is rated by the Energy Star for energy efficiency. It is a great selling point for this device, as generally, people will look for this symbol first.

For running the Coway AP-0512NH for 8 hours per day, you need to pay $20 per year.

Related post: Best air purifiers for pets.

Coway AP-0512NH Additional Features

Beside the interesting sound function, what could we expect from a budget air purifier like the Coway AP-0512NH?

I guess that we don’t have much choice, as the old Coway AP-0512NH doesn’t have the signature Eco Mode of this company. And therefore no Smart Sensor for the price. Winix 5300-2 and Winix C535 will be better alternatives if you need this function.

If you buy this air purifier, you will have the timer function as well as a great LED indicator for filter replacement. Not much, but it is helpful, right?

Related posts:

1, Best air purifiers for smoke.

2, Best air purifiers for dust.

3, Best air purifiers for mold.

Coway AP-0512NH Customer Service

As one of the top electronic brands in Korea, Coway is somehow as huge as Samsung. This brand not only carries out clean innovations for the customers, but Coway also delivers its direction as Coway Trust. That’s why Coway always places a strong focus on its customers and community. With global subsidiaries and regional dealerships that serve over 60 countries, you should believe in the customer service of the company.

Moreover, you can contact Coway’s customer service via phone at 800-285-0982 or via email at Normally, customer service will try to contact you within 24 hours.

All air purifiers made by Coway have their motor and electronic parts warranted for 3 years, while other internals are warranted for 1 year.

Top Coway AP-0512NH deals right now

Coway AP-0512NH Sound Air Purifier (Covers up to 155 square feet).

The Coway 2-in-1 Air Purifier and White Noise Machine, with the specific 6 soothing sound to help you sleep better.

Our verdict

As keen as we are on affordable air purifiers, we can get a better one out of the Coway AP-0512NH. But the soothing sound is truly great, and if you really need a solution for your sleeping issues as well as to release the burden of allergies and asthma, you can have this device.

Sadly, the Coway AP-0512NH has been discontinued.

Coway AP-0512NH Air Purifier: Trusted Review in 2024
Coway AP-0512NH Air Purifier: Trusted Review & Specs

Coway AP-0512NH Reviews and Specs (Air Purifier Trusted Reviews in 2024). ✓ Cleaning Power: True HEPA ✓ 6 Soothing Sounds ✓ Value: 3.8/5 ✓ Certified Review.

Product Brand: Coway

Product Currency: USD

Product Price: 197

Product In-Stock: SoldOut

Editor's Rating:
  • Performance
  • Features
  • Annual Cost
  • Design
  • Price


It is discontinued, so stop looking for it.