HEPA filter
Air filters load up with dust and smells. The maker lists how often to change it.
Alen A375: the hepa filter is part F00001. Source: Alen, checked November 6, 2026.
Air filters load up with dust and smells. The maker lists how often to change it.
1HEPA filterF00001Part numbers come from Alen (source), checked November 6, 2026. Amazon buttons open a search for the part number; we may earn a commission.
On a label on the bottom or the back of the purifier.