Flintar MD1-0023 4-Pack Activated Carbon Replacement Filters, Compatible with Vornado Air Cleaner Purifier Model AC300, AC350, AC500, and AC550

Just now ordering more you can wash them a few times

Ordered these to replace my old OEM carbon filter and was pleased to see that they appear to be a tad more durable than the old foam style OEM carbon filter your Vornado comes with. Can’t beat the price as well!

I waited 6 months until the light came on to change my carbon filter and it was nasty. Now, I can change it every 3 months with these instead at an excellent value.

An inexpensive way to upgrade your mask. The filters do not inhibit the mask in any way that I can tell. I cut 5/8" diameter discs and placed them in the vents of the dust mask. I used a dime to cut around. I have a 5/8" leather punch coming in to make things easier.Recommend the DIY upgrade.I did this because it was either the Mayo Clinic or St Jude that would not allow this mask as the exhaust vents weren't filtered. Hopefully this meets their requirements. I do not plan to visit either but I thought the upgrade was a good idea.

The filter is slightly courser than the original and doesn't provide quite the filtration as the original manufacturer's filter. Suitable for use but not as protective of the pleated filter.

Awesome product! Thicker than the original OEM filters. Highly recommend!

They're decent. They fit my air purifier just fine. To be honest I don't notice much of a change when I change it.

Purchase of Charcoal filters for our air purifying unit was more convenient than going through the manufacturer