Alen (brand store)white $449
Shippingabout 3–7 days
Returns–
Alen BreatheSmart 45i
No lab has tested it yet, so it is not in our ranking.
Is the Alen BreatheSmart 45i right for your home? Find out in 7 questions →
Before you buy, compare it with 2 recommended alternatives
Beside it, two models on sale today that come closest to it on score and price, with the same kind of station where we have them.
Green is the best of these 3, also when they share the lead.
| This model Alen BreatheSmart 45i | Higher score, 51% cheaper Levoit Core 400S-P Best on 2 facts | Higher score, 29% cheaper Blueair DustMagnet 5440i | |
|---|---|---|---|
| Price and ranking | |||
| Lowest price | $449Alen (brand store) | $219Levoit (brand store) best | $319Blueair (brand store) |
| Score | not in our ranking | best | |
| Rank | – | rank 1 of 13 for large rooms | rank 3 of 13 for large rooms |
| Customer rating | – | – | – |
| Station | |||
| Room size same on all | large rooms | large rooms | large rooms |
| Size, noise and age | |||
| Height lower is better | – | – | 22 in (55.9 cm) |
| On the market since | October 2024 | June 2023 | May 2025 |
Facts as the maker states them. A dash means the maker does not name it. Each model’s page gives the source of every fact. Noise is the maker’s own figure, so we do not judge it, and a customer rating only counts from 20 reviews.
Prices per store
On October 15, 2026 the lowest price for the Alen BreatheSmart 45i is $449 at Alen (brand store), shipping to the United States included.
All prices include shipping to the United States. Sales tax is added at checkout. We may earn a commission when you buy through these links. It never changes our ranking.
Alen (brand store)white Alen (brand store)black $488
Shippingabout 3–7 days
Returns–
Alen (brand store)brown $488
Shippingabout 3–7 days
Returns–
Alen (brand store)gray $488
Shippingabout 3–7 days
Returns–
Price history
Lowest price per day Tap a store to hide or show its line.
Lowest since Oct 14$449
Highest since Oct 14$488
Price drops since Oct 140no drop seen yet
Alen BreatheSmart 45i specifications
The numbers that matter first, then every fact by group. As published by the maker or the store we read it from.
Alen · on the market since October 2024
Clean air delivery rate (CADR)255 cfm
Room size we compare on389 ft²
Filter life9 months
Power at the highest speed50 W
Running cost: Filters: about $138 a year at today’s prices.
Consumables: The filter lasts about 9 months.
Cleaning performance 3 facts
- Clean air delivery rate (CADR)
How much clean air the purifier delivers an hour, measured with smoke, dust and pollen. A higher figure cleans a bigger room or the same room faster.
- 255 cfm (433 m³/h)
- CADR measured to
The test the CADR comes from. AHAM AC-1 and the DOE test are independent and comparable. A maker's own test is not.
- Not stated
- Room size we compare on
The room size where the purifier changes the air 4.8 times an hour under a 2.5 m ceiling, worked out from its CADR. We use it so every model is compared on the same rule.
- 389 ft² (36 m²)
Running costs 1 fact
- Filter life
How long the maker says a filter lasts, in months of normal use. A filter that is spent cleans less.
- 9 months
Noise and power 1 fact
- Power at the highest speed
The power the purifier draws at its highest speed.
- 50 W
Air quality sensing 2 facts
- Particle sensor
- Laser
- Automatic mode
The fan speed follows the air quality the sensor reads.
- yes
Sources: alen.com
The maker
Alen
- Headquarters: United States
Alen is an Austin-based maker of HEPA air purification products. Its range includes the BreatheSmart air purifiers, replacement filters, accessories and Scentra scents. The company says it aims to improve people's quality of life with air purification products.
