Which filters does the Alen FLEX take?

HEPA filter F10016, HEPA filter F10516.

Alen FLEX air purifier filters: F10016

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 F10016

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 F10516

1HEPA filterF10016

Part numbers come from Alen (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 Alen air purifiers

BreatheSmart 25iBreatheSmart 35iBreatheSmart 45iBreatheSmart 75iBreatheSmart ClassicBreatheSmart FIT50T500