LINNIW 40 Replacement Filter H13 HEPA 40 Compatible with medicy 40 3-in-1 Pre-Filter, H13 HEPA and Activated Carbon

The only noticeable difference is the metal frame does not say genuine Medify filter and the inside metal is folded flat where the Medify has rounded edges (both of which only add to the cost of making the filter)The only part that concerns me is if it is trueing H13 or not. Which is the selling point for Medify vs other brands.

This is a great replacement filter. I have really put it to the test! I live in a dusty neighborhood, wear shoes in the house, have a messy dog, and smoke. This filter is a work horse - it keeps my air clean.The replacement filter fits nicely. Dirty one comes out easily and not too messy, clean one goes right in.

Seems to be the same quality and looks identical to the "manufacturer" filters that they try to force you to buy that cost twice as much.

This filter seems good. Especially for the money. However, the charcole hexagons are not completly full like in the medify branded filter where the hexagona are packed full. You can test this by holding them both up to light and see how it shines through to test that. Second, the prefilter mesh on this product has large holes and is not as fine of a prefilter as the medify product. Still seems to be a quality product, just not as much as Medify's but... hard to argue with the value you get with LINNIW. LINNIW is also made in China if that matters to you. Hope this is helpful for people, sorry i didnt post pics, its Christmas Eve day and i'm being lazy today. All the best, N

Honestly I think this one works better than the original one it came with. Its a bit pricey and I am not sure if ill be able to afford it.

This filter was an exact replacement for the manufacturer filter. It was new and well made. I found no difference in quality or fit to my unit. The noise with this filter is similar to the manufactured filter. I have not noticed a change in the air quality either. I would purchase this product again.

Bought this to replace the filter. This was cheaper than the original filter in my system and I cannot tell any difference between the quality of this filter and the original. Haven't had it long enough to see if it will last as long but see no reason why it shouldn't.

Good value, works great.