H/C Humidifier Filter (Pad) - HCWB2-17/18 & HCWB3-17/18 (Stock #35)

White power or dust is normal to be on the humidifier replacement pads. This substance is put on the metal pads to help adhere the water to get maximum humidification in your home. Rust or major discoloration is a good sign that it is time to replace the pad for optimal performance. Typically, homeowners change their pads once a year no matter what. This material is not a "washable" material and should be changed yearly. 

WB2-17

WB3-17

WP2-18

WP2-18a

WP3-18

WP3-18a

 

Will also fit:

HUMBBLBP2217

 

Also Fits Aprilaire Models:

350

560

560a

568

600

600a

600m

700

700a

700m

760

760a

768