Which filters does the Shark HC451 take?

HEPA filter HE1FKBAS, HEPA filter HE1FKPET.

Shark HC451 air purifier filters: HE1FKBAS

HEPA filter

Air filters load up with dust and smells. The maker lists how often to change it.

Shop the hepa filter on Amazon Other models that use HE1FKBAS

HEPA filter

Air filters load up with dust and smells. The maker lists how often to change it.

Shop the hepa filter on Amazon Other models that use HE1FKPET

1HEPA filterHE1FKBAS

Part numbers come from Shark (source 1, source 2), checked November 6, 2026. Amazon buttons open a search for the part number; we may earn a commission.

Where the model number is

On a label on the bottom or the back of the purifier.

Other Shark air purifiers

HC450HC450CHC452HC452CHC455HC500HC501HC502