Filter Fit FinderAlen · air purifier filter
Alen FF50-Pure
BreatheSmart FIT50 HEPA Filter, Pure. Part FF50-Pure. Replace every 9-to-12-month lifespan. Fits 1 model.
Opens an Amazon search for Alen FF50-Pure. Check the listing says FF50-Pure.
Fits these models
Part numbers
- Genuine part
- FF50-Pure
- Also listed as
- F40001
- How often
- Replace every 9-to-12-month lifespan
- What is in it
- Prefilter (black mesh layer); True HEPA (H13)
Sources
- Which filter fits alen.com Maker's own page checked Oct 1, 2026
BreatheSmart FIT50 HEPA Filter ... (FF50-Pure) ... Fits Model: BreatheSmart FIT50
- How many web.archive.org Maker's archived page checked Oct 1, 2026
Page for the BreatheSmart FIT50 (per its URL): Remove the used filter by pulling out on the pull strings ... insert it into the air cleaner with the pull strings facing outward. (The front side has the black mesh layer, known as the prefilter ...) (archive.org copy of 2025-10-09)
- How often alen.com Maker's own page checked Oct 1, 2026
9-to-12-month lifespan
- Other genuine options alen.com Maker's own page checked Oct 1, 2026
(FF50-Fresh) ... (FF50-Odor) ... (FF50-Pure) ... (FF50-VOC)
Show all 5 sources
Which filter fits
- alen.com Maker's own page checked Oct 1, 2026
BreatheSmart FIT50 HEPA Filter ... (FF50-Pure) ... Fits Model: BreatheSmart FIT50
- alen.com Maker's own page checked Oct 1, 2026
BreatheSmart FIT50 HEPA Filter variants: Pure F40001; Fresh F40002; VOC/Smoke F40003
How many
- web.archive.org Maker's archived page checked Oct 1, 2026
Page for the BreatheSmart FIT50 (per its URL): Remove the used filter by pulling out on the pull strings ... insert it into the air cleaner with the pull strings facing outward. (The front side has the black mesh layer, known as the prefilter ...) (archive.org copy of 2025-10-09)
How often
- alen.com Maker's own page checked Oct 1, 2026
9-to-12-month lifespan
Other genuine options
- alen.com Maker's own page checked Oct 1, 2026
(FF50-Fresh) ... (FF50-Odor) ... (FF50-Pure) ... (FF50-VOC)