Product review (4 stars): Nice bargain priced replacement filters
Our central humidifier went on the fritz, so we resurrected our old Duracraft table-top unit - which required new filters, of course - and it has performed well enough to make a noticeable difference in our (1500 sq ft) ranch, although this usage has to be stretching the performance intent of the unit!

This filter seems to work fine in the Duracraft, although fitment is not exact: it seems slightly over-sized (regardless of orientation), and must be Press Fit into its holder.

The filter also features a metallic column that runs down its center that tends to discolor the bottom of the water tray where the metallic strands make contact.

As noted in the other review, the top portion of the filter runs dry: while it is true that this is the portion that sustains most of the air flow, it is also possible that a better material would wick more water to the top.