Fil-freshAirmega AP-1512HH Air Purifier Replacement Filter for Coway, 2-Pack

I have used these for years , am have been totally satisfied

These are roughly half the price of Coway. But, they aren't the same quality either. Cardboard edge not quite as tight a fit as Coway, who use filter material for edges as well. Filter media is thinner. Same number of pleats, but you can tell material thickness is considerable less. Not as "puffy". More like a coffee filter. With filters, media thickness counts for a lot. Thicker media holds greater mass particles before clogging up. The Nispira brand I bought just before these is virtually indistinguishable from OEM and is somewhere between the Coway and these in price. Though more money, I perceive those as a better value and I will likely buy Nispira in future.

Ordered in Oct, replaced in Nov. Noticed extra dust in room, but just looked at outside filter and vacuumed. Continued layer of excessive white dust so upon opening purifier saw white powder all over floor, pre filters etc. Looked like HEPA was disintegrating. Powder is inside machine (Coway AP 1512HH) AND BELIEVE IT HAS COMPROMISED THE MACHINE!!! (over $200 item) Really disappointed and obviously beyond refund date.

There are two types of filters in this pack. The larger HEPA filter, which is (presumably) pleated electrostatic material. And there are the black "active charcoal" filters.To be clear: The activated charcoal filters they sent are not the same type as originally came with the machine. And it's unclear if the type they sent are at all effective. The original manufacturer's filters are a plastic honeycomb filled with physical pieces of charcoal that you can see. The kind in this pack, are just a plastic matted material, colored black. They might be somehow infused with active charcoal. But they might not.The onus is on the manufacturer of these replacements to show that their charcoal filters, which are completely different than the originals; are any good at all. And really, that should be a third party laboratory's report.If this company is perfectly happy sending me a completely different kind of charcoal filter that probably isn't actually effective, I have to question their "HEPA" filter. Because not all electrostatic filter material is the same. And they could just as easily be cutting corners and lying about the HEPA, as they do the charcoal filter.So I won't be reordering these filters again. And the next time I try, I'm going to be far more diligent in finding a supplier that at least tries to replicate the original filters without lying to me so obviously.There's no point in owning a high quality machine and then putting filters in it that cannot stand up to the simplest of scrutiny.

I finally installed one of the HEPA filters in my Coway after using a couple of the carbon odor filters. The odor filters seem just fine - I can't discern any difference from the original filter. However the HEPA filter causes my Coway to be significantly noisier than the original filter. With the original filter, the lowest setting is truly whisper quiet - basically silent in the room, barely audible within a couple feet. The Coway is no longer silent with the Fil-fresh replacement. It's still quiet, but there's a much more audible white-noise "whoosh" that you can clearly hear anywhere in the room. And at the higher settings, it's significantly noisier. Besides the noise, two concerns with what must be higher resistance - it's reducing airflow performance, and it's putting more strain on the motor which could affect its lifespan. I'll probably just pony up for the OEM filters next time.