holmes replacement filters

Replacement filters are sold as HEPA filters, activated carbon (carbon) filters, or combined 3-in-1 units that include HEPA + activated carbon plus a preliminary fiber pre-filter.

The HEPA replacements are described as removing up to 99.97% of airborne particles as small as 0.3 microns.

Most listings recommend replacing the filters every 6 months to maintain effectiveness and efficiency.

Most listings give a HEPA filter size around 1.2 × 10 × 4.6 inches (some list 1.37 × 10 × 4.62 inches). Carbon pre-filters are sometimes listed at about 9.5 × 4 × 0.25 inches.

Descriptions list materials/components including HEPA filter media, activated carbon (charcoal), polypropylene and a fiber preliminary pre-filter.

Installation is described as simple: remove the old filter and insert the new one, with no additional tools required.

Some listings give HEPA sizes around 1.2 × 10 × 4.6 inches (alternatively 1.37 × 10 × 4.62 inches), while the carbon pre-filter is listed around 9.5 × 4 × 0.25 inches.