Customer reviews from alencorp.com
Alen - BreatheSmart 45i 800 SqFt Air Purifier with Fresh HEPA Filter for Allergens, Dust, Odors & Smoke - Graphite
Average customer rating
4.9
(1,371 Reviews)
Rating breakdown 1,371 reviews
5 Stars
1,238
4 Stars
91
3 Stars
23
2 Stars
9
1 Star
10
Customer Reviews for Alen - BreatheSmart 45i 800 SqFt Air Purifier with Fresh HEPA Filter for Allergens, Dust, Odors & Smoke - Graphite
Customer Rating
5
A breath of cleaner air!
on March 26, 2026
Posted by: Jason
I’ve gone through my share of air purifiers, but the Alen 45i is the first one I don’t feel the need to hide behind a couch. It’s sleek, matches my decor perfectly, and is incredibly quiet. I love the color-coded ring—it’s a quick peace of mind to see that blue light and know the air is clean. Definitely worth the investment for the silence alone!
Written by a customer while visiting alencorp.com
Customer Rating
5
Peace of mind
on February 28, 2026
Posted by: Tamia
I did a lot of research on air purifiers after having mold grow on a home ERMI test and landed on this brand. I couldn’t be happier! They are stylish, quiet, and my allergy symptoms are so much better. I am super happy with all 4 units I bought and have great peace of mind that my air is clean especially during fire season.
Written by a customer while visiting alencorp.com
Customer Rating
5
Alen 45I
on February 10, 2026
Posted by: Jacob D.
The filter showed up fast, the sensor helped me to pin point the source of the pollutant by referencing the charts in the app
Written by a customer while visiting alencorp.com
Customer Rating
5
The best!
on February 2, 2026
Posted by: Anastasia
[This review was collected as part of a promotion.] The best air purifier on the market! My main goal was to get rid of cooking smells, and this filter does the job perfectly.
I also tested it at my workplace, where mildew had occurred, so the space could be safely occupied before construction. Thanks to this air purifier, the air was clean - no smell and no symptoms from the mildew. I’ll definitely be getting another one for my bedroom and workspace.
Written by a customer while visiting alencorp.com
Customer Rating
5
Changer for My Living Room!
on January 17, 2026
Posted by: Crystal
[This review was collected as part of a promotion.] We use the Alen i45 in our living room and have been extremely happy with it. It runs quietly, looks great in the space, and noticeably improves air quality. The air feels cleaner and fresher, and it’s made a real difference with dust and everyday odors. Setup was quick and easy, and it’s been reliable ever since. Highly recommend for anyone wanting effective, low-maintenance air purification.
Written by a customer while visiting alencorp.com
Customer Rating
5
45i Purifiers
on January 9, 2026
Posted by: N
I bought two of them. I recommend the odor filter, too.
Written by a customer while visiting alencorp.com
Customer Rating
3
Good purifiers
on January 9, 2026
Posted by: Brian D.
We have 5 of the Flex Purifiers. We like them all. They are quiet, have a good exchange rate, and a good design. I have to give 3 stars because they just stopped offering the VOC/Smoke filters which have the most carbon. This was one of the reasons we bought so many purifiers from this company. So, we are disappointed by that change. I hope they bring them back at some point.
Written by a customer while visiting alencorp.com
Customer Rating
5
Good
on November 23, 2025
Posted by: Scott
I purchased the Alen BreatheSmart 45 for our master bedroom and it has been excellent so far. It’s powerful enough to handle the space, and within a short time we noticed the air quality feels much better—cleaner, fresher, and overall more comfortable. The unit runs quietly, even on higher settings, and the design blends in nicely with the room.
Overall, I’m very happy with this purifier. It does exactly what it promises and has made a noticeable difference in our home’s air quality. Highly recommend!
Written by a customer while visiting alencorp.com