Customer reviews from alencorp.com
Alen - BreatheSmart 45i 800 SqFt Air Purifier with Fresh HEPA Filter for Allergens, Dust, Odors & Smoke - Weathered Gray
Average customer rating
4.8
(1,377 Reviews)
Rating breakdown 1,377 reviews
5 Stars
1,241
4 Stars
92
3 Stars
25
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 - Weathered Gray
Customer Rating
4
Nice Air Purifier!
on October 8, 2026
Posted by: Mike N.
This air purifier is nice but we had originally purchased the 75i for our basement and then bought the 45i for our master bedroom. However, we just didn’t like the sound of the 45i for sleeping; it just didn’t work for us. We returned it and bought another 75i and we’re happy.
Written by a customer while visiting alencorp.com
Customer Rating
5
45I and two cats
on October 5, 2026
Posted by: Donna
Prior to leaving for an extended visit with my family, I let my husband know our 45I in the bedroom was going to need the filter replaced. We have two cats. Upon my return, my allergies were acting up, I feared I was getting sick from the travel. It occurred to me to check to see if he had changed the filter (see video attached). I changed the filter before we went to bed. The next morning I woke up feeling perfectly fine and slept well! There is no way I would survive my allergy symptoms living with pets without our Alen Air Filters!!
Written by a customer while visiting alencorp.com
Customer Rating
3
Returned 45i for 75i
on September 22, 2026
Posted by: Mike N.
We had purchased our initial 75i for the basement and then bought a 45i for the master bedroom. We just didn’t like the sound of the 45i for sleeping; it was too loud for us. We returned it and bought another 75i for the master and been very happy.
Written by a customer while visiting alencorp.com
Customer Rating
3
Returned 45i for 75i
on September 21, 2026
Posted by: Mike N.
We had purchased the 75i for the basement and then bought 45i for the master bedroom. We just didn’t like the sound of the 45i for sleeping; it was too loud for us. We returned it and bought another 75i and we’re happy.
Written by a customer while visiting alencorp.com
Customer Rating
5
Powerful filter that works super well!
on September 1, 2026
Posted by: Mike
We have one of the 45i machines (and 2 75i ones), for a smaller room in the house, where I work from home all day. This thing catches all the dust and allergens like a pro, and when it's wildfire season (Northern California) it keeps that room smelling way better than outside. Reliable and filters aren't too expensive. Definitely recommend!
Written by a customer while visiting alencorp.com
Customer Rating
5
Incredible Air Quality
on August 25, 2026
Posted by: J P.
I have an Alen 45i and also a Flex. I keep the 45i in my living room, dining room combo. The flex is in my bedroom. I cannot rave enough about Alen air purifiers. They simply have changed my life. I live in the desert southwest with lots of dust and dry air. Lots of pollen and grasses, plus I have two dogs live in my house. What a difference to these Alen Air purifiers have made for my health and allergies. Thank you for creating such an amazing product!
Written by a customer while visiting alencorp.com
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