Shipping is only $7.99 per order, no matter how much you order! Microban Antimicrobial Filter Protection protects the HEPA filter against bacteria, mold and mildew, which cause odors. Change your filter every 6 to 12 months depending on the air quality in your home or office.
Fits Holmes models HAP-100, HAP-100N, HAP-1004, Norelco CA-220, and HB-1920.
3-layer fiber replacement filter.
1) Dense fiber filter
2) Activated carbon filter
3) Micro-Screen layer.
Replacement Filter Great product. Just as described and received in a timely manner. I would order again....more info