PURBURG 4-Pack Replacement Humidifier Wick Filters for Vornado MD1-0002: Compatible with Multiple Models & Brands - Holmes HM250, HM405, HM406, HM725, and more! Review

I bought them because it says '4 Pack'. For me this meant only 8 wicks as others I bought had 2 wicks per pack. Just know that with them you only have 4 wicks.

It doesn't fit my Vornado humidifier but they fit, work very well and last much longer than the stock filters for my unit. I use well water with high mineral content and it lasts at least a month.

After a few weeks they stopped absorbing water and became unusable for humidification. Tried to twist them to open the opposite end. OEM versions remain valid for several months.

I only bought them because the Vornado brand was out of stock. They stopped licking in less than a week. The humidity increased from 45% to 30% in 4 days. I turned them twice a day and each time they dried out completely. Stick to the brand name.

This photo has been used for about a month. The humidifier runs about 10 hours a day. Works well and I've had no problems with them at all. I will order again. We have hard water and even use fabric softener. I change them often. Monthly. I use them in my Vornado humidifier.

I couldn't figure out why my Vornado stopped wicking. After all, there are few moving parts. Looking at other reviews of this and other products, I learned that the problem was that the filter only got a few inches wet. One reviewer suggested soaking them in hot water with white vinegar for twenty minutes. Haven't tried it yet, but I flipped the filters so the wet part was up and that seemed to help improve the humidity by a few percent. Therefore, some filters from this and other brands do not