Alen
Alen BreatheSmart Flex
A H13 True HEPA air purifier rated for rooms up to 700 sq ft.
Key specs
Room coverage700 sq ft
Noise range39–55 dB
Filter life12 months
What owners say
Filter by theme
- 5.0 out of 5 stars
“The Alen BreatheSmart Flex is designed to operate quietly, making it perfect for bedrooms.”
- 5.0 out of 5 stars
“The Alen BreatheSmart Flex is an excellent choice for bedrooms and home offices, especially for rooms between 700 and 1,400 sq. ft.”
- 5.0 out of 5 stars
“I have allergies, and I need an air purifier for my bedroom. Is the Alen BreatheSmart Flex a good fit for that?”
- 5.0 out of 5 stars
“The 75 is almost silent.”
- 5.0 out of 5 stars
“We are very pleased with it.”
Research notes
Shares filters with 45i; turbo ~187 CFM; multiple panel colors/filter SKUs
Compare with similar models
- AlenPrice variesAlen BreatheSmart 75i3.6 out of 5 stars3.6/5i1300 sq ftQuiet operationPet hair & dander“The 75 is almost silent.”
- AlenPrice variesAlen BreatheSmart 45i2.8 out of 5 stars2.8/5i800 sq ftDust controlOdor & VOC control“Complete game changer in air quality in my home.”
- Rabbit Air$619.95Rabbit Air MinusA23.4 out of 5 stars3.4/5i815 sq ftAHAMEnergy Star“The rabbit is better, more sensitive to detecting changes in the air.”
- Levoit$303.98Levoit Core 600S3.9 out of 5 stars3.9/5i606 sq ftAHAMEnergy StarSmoke & wildfireValue for money“it’s been great for dust.”
Full specifications
- asin
- B08SZ8FGBZ
- confidence
- high
- weight lbs
- 15
- filter type
- H13 True HEPA
- model number
- BreatheSmart Flex / BH400
- noise db max
- 55
- noise db min
- 39
- source mentions
- 3
- room coverage sqft
- 700
- has activated carbon
- True
- filter lifespan months
- 12