Alen 45i HEPA Air Purifier, Ultimate Filter, Covers 1,900 Sq Ft - White
Alen 45i HEPA Air Purifier, Ultimate Filter, Covers 1,900 Sq Ft - White
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Alen 45i HEPA Air Purifier, Ultimate Filter, Covers 1,900 Sq Ft - White

|28 ratings
Alen 45i HEPA Air Purifier, Ultimate Filter, Covers 1,900 Sq Ft - WhiteAlen 45i HEPA Air Purifier Ultimate Filter Covers 1 900 Sq Ft WhiteAlen 45i HEPA Air Purifier Essential Filter Covers 1 900 Sq Ft WhiteAlen 45i HEPA Air Purifier Advanced Filter Covers 1 900 Sq Ft White
Actual ColorUltimate

Key item features

  • Superior Filtration: Features H13 HEPA filters capturing particles as small as 0.1 micron, removing dust, pollen, pet dander, allergens, mold, and germs.
  • Expansive Coverage: Designed to efficiently purify air in spaces up to 1,900 sq ft every hour, or 950 sq ft in thirty minutes, making it suitable for large bedrooms, living rooms, dining rooms, and office environments.
  • Smart Air Purification: SmartSensor adjusts fan speed based on air quality, with color-coded feedback. Blue rings indicate excellent air quality levels while purple rings indicate high particle presence
  • Sleep Optimized: The 45i is proven by SleepScore Labs to enhance sleep according to a peer study. Its ultra-quiet operation emits pink noise, optimizing lower octave frequencies, and ensuring a restful night. An excellent addition to air purifiers for bedroom for undisturbed, quality sleep, so you wake up feeling rested
  • Peaceful Operation: Ultra-quiet operation from a quiet motor emits soothing pink noise. Ranked among the quietest 20% of air purifiers.
  • Energy Conscious: Designed for 24/7 continuous use, operating at an energy cost of only $0.12 per day, providing constant air purification economically.

Specs

Filter type, HEPACoverage area, 1900 sq ftClean air delivery rate, 257 CFMContaminants removed, Volatile Organic Compounds (VOCs), Allergens, Dust, Viruses, Smoke, Odor, Pet DanderMicroparticle performance rating, 99.97Brand, Alen

About this item

Product details

Breathe cleaner, fresher air with the Alen 45i HEPA Air Purifier featuring our Ultimate Filter. Designed for large rooms up to 1,900 sq ft, it removes 99.97% of airborne particles like dust, allergens, pet dander, and odors. With ultra-quiet operation and smart auto-mode sensing, it’s perfect for bedrooms, open living areas, and homes with kids or pets. Backed by Alen’s Forever Guarantee.
  • Superior Filtration: Features H13 HEPA filters capturing particles as small as 0.1 micron, removing dust, pollen, pet dander, allergens, mold, and germs.
  • Expansive Coverage: Designed to efficiently purify air in spaces up to 1,900 sq ft every hour, or 950 sq ft in thirty minutes, making it suitable for large bedrooms, living rooms, dining rooms, and office environments.
  • Smart Air Purification: SmartSensor adjusts fan speed based on air quality, with color-coded feedback. Blue rings indicate excellent air quality levels while purple rings indicate high particle presence
  • Sleep Optimized: The 45i is proven by SleepScore Labs to enhance sleep according to a peer study. Its ultra-quiet operation emits pink noise, optimizing lower octave frequencies, and ensuring a restful night. An excellent addition to air purifiers for bedroom for undisturbed, quality sleep, so you wake up feeling rested
  • Peaceful Operation: Ultra-quiet operation from a quiet motor emits soothing pink noise. Ranked among the quietest 20% of air purifiers.
  • Energy Conscious: Designed for 24/7 continuous use, operating at an energy cost of only $0.12 per day, providing constant air purification economically.
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Specifications

Filter type

HEPA

Coverage area

1900 sq ft

Clean air delivery rate

257 CFM

Contaminants removed

Volatile Organic Compounds (VOCs), Allergens, Dust, Viruses, Smoke, Odor, Pet Dander

Warranty

Warranty information

Limited lifetime warranty available, see manufacturer site for details about the Forever Guarantee.

Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.

Customer ratings & reviews

4.7 out of 5 stars
stars
28 ratings26 reviews
Includes global ratings and reviews
How item rating is calculated
  1. 5 stars82% (23)
  2. 4 stars7% (2)
  3. 3 stars11% (3)
  4. 2 stars0% (0)
  5. 1 star0% (0)
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Showing 1-3 of 26 reviews

Oct 30, 2026
Reviewer name: Alina D.
5 out of 5 stars
5 out of 5 stars review

Absolutely Love It! Exceeded Expectations!

From start to finish, my experience with Alen has been fantastic! The ordering process was seamless, delivery was incredibly fast, and setup couldn't have been easier. The BreatheSmart 45 is not only effective but beautifully designed. Its sleek, slim profile allows it to blend effortlessly into any room without being an eyesore. In fact, it looks more like a stylish addition to the decor than an air purifier! It's also unbelievably quiet. You barely even notice it's running, yet the difference in air quality was noticeable almost immediately. The air simply feels fresher and cleaner, and it's wonderful knowing it's working so efficiently in the background. I was so impressed with my first purchase that I went ahead and ordered more, and I'm so glad I did! It's rare to find a product that checks every box: appearance, performance, convenience, and quality. Couldn't be happier with my purchase or the overall experience. Highly recommend Alen to anyone looking to improve their indoor air quality without compromising on style or comfort. Worth every penny!

Review from alencorp.com
Helpful?34TH36YTW4T318666161041
Oct 5, 2026
Reviewer name: Donna
5 out of 5 stars
5 out of 5 stars review

45I and two cats

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!!

Review from alencorp.com
Helpful?34TH36YTW4T318666161041
Sep 2, 2026
Reviewer name: Mike
5 out of 5 stars
5 out of 5 stars review

Powerful filter that works super well!

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!

Review from alencorp.com
Helpful?34TH36YTW4T318666161041
Current price is $479.00
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