Which wick filter does the AIRCARE HD04W take?

AIRCARE HD04W humidifier wick filter

AIRCARE HD04W: the wick filter is part HDC3T. Source: AIRCARE, checked November 6, 2026.

Wicks harden with minerals and soak up less water over time.

1Wick filterHDC3T

Part numbers come from AIRCARE (source), checked November 6, 2026. Amazon buttons open a search for the part number; we may earn a commission.

On a label on the base, often under the water tank.