Pick the brand
The brand is printed on the same plate as the model number.
Filters that come up most
The part numbers listed for the most humidifiers in the index. Open one to see every model it fits.

1041Wick filter132 humidifiers
35Humidifier pad120 humidifiers
10Humidifier pad89 humidifiers
HAC-504Wick filter52 humidifiers
MAF1Wick filter49 humidifiers
HDC1Wick filter41 humidifiers
1043Wick filter38 humidifiers
HDC12Wick filter35 humidifiers
1040Wick filter34 humidifiers
HDC411Wick filter29 humidifiers
HC-14Wick filter20 humidifiers
1051Wick filter19 humidifiersWhere the model number is
On humidifiers, the plate or sticker sits in one of a few places.
Humidifiers: On a label on the base, often under the water tank.