Bests & Worsts Reviews from Amazon

I bought two different air filters Veva and Durabasics to compare to the original Coway. While I have no way of testing their effectiveness at filtering air, there are basic differences you can see just by looking at them. Coway: The original Coway filters are by far the best fit. The pre-filers fully cover the screen and the HEPA filter fits perfectly into the machine. However, they are the most expensive and only include ONE pre-filter with the original machine (why do they do this even though they recommend changing the pre-filter every 6 months?!) Veva: These came in a close second to the Coway originals. The pre-filter is slightly too short on one side. The HEPA filter does fit into the machine but slightly bends at the sides. This doesn't bother me enough to return and I'll be keeping these. I'd recommend these to someone looking to spend less than the original, but not to someone who wants TOTAL HEPA filtration. If you really need that, go with the Coway originals. Durabasics: I can't recommend these. The charcoal pre-filter came bent and doesn't fit the screen; it was actually too wide on one side and buckled against the screen. It was also slightly too short on the other side. Yes, I did put it in both ways to make sure it was the right way up. The HEPA had the WORST fit of the three. There was a noticeable gap along the top after inserting it into the machine. NOTHING ever said HEPA, not even on the filter itself. TLDR: Go with Coway if you want 100% filtration and fit. Go with Veva if you're okay with a slightly off fit, lower price, and possibly a lesser filter. Durabasics you should pass on.