Alen - BreatheSmart 45i 800 SqFt Air Purifier with Pure HEPA Filter for Allergens, Dust & Mold - Oak
Customers are saying
Customers often highlight the air purifier's effectiveness in cleaning the air and its consistent ability to filter out dust, mold, and other pollutants. Users also appreciate that the device operates quietly, particularly when set to lower speeds. Overall, the product is well-regarded for its reliable performance in maintaining better air quality.
Features
Pure Filter
Our most popular filter for eliminating everyday allergens and pollution from your air; the HEPA Pure filter captures 99.9% of dust, allergens, and harmful fine pollutants as small as 0.1 micron; ideal for everyday home purification, allergy and asthma sufferers, and virus concerns.
Improved Sleep
The BreatheSmart 45 is proven to improve sleep according to a peer-reviewed study by SleepScore Labs; incredibly quiet, the 45i emits a soothing pink noise that boosts frequencies in the lower octaves, so you wake up feeling rested.
Room Size
The BreatheSmart 45i quietly and efficiently circulates the air in rooms up to 800 sq. ft. every 30 minutes; perfect for primary bedrooms and other large bedrooms.
Top Perfomance
Alen air purifiers excel with a strong fan, silent motor, advanced filters capturing 0.1-micron particles (dust, pollen, germs), and energy efficiency at $0.12/day for 24/7 operation, ensuring superior airflow with minimal noise.
Smart
SmartSensor technology detects when airborne particles are present and automatically adjusts fan speed; color coded rings let you know Alen is working to clean the air: Blue = Excellent, Green = Good, Orange = Fair, Red = Poor, Purple = Bad air quality (high levels of particles).
Wifi Enabled
Connect the BreatheSmart 45i to the Alen Air app to view real time air quality and see historical trends; you can also control your purifiers remotely, set air quality notifications, and get reminders when it’s time to replace your filter.
Designer Panels
Choose from multiple designer panels options to make your Alen just right for your space; designer panels are easy to change whenever your décor changes.
Specifications
- Recommended Room Size800 square feetApp CompatibleYesWireless ConnectivityWi-FiAir Purifier TypeConsoleAir Quality Indicator Light(s)YesIonizingYes
Reviews
Rating 4.5 out of 5 stars with 27 reviews
- Air Purification (8)
- Overall Performance (8)
- Noise Level (5)
Customer Images
The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.
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The Alen BreatheSmart 45i is ideal for bedrooms and other rooms up to 800 sq. ft. Proven to improve sleep by and independent SleepScore Labs study, the BreatheSmart 45i emits a soothing pink noise that boosts frequencies in the lower octaves, so you wake up feeling rested. Alen air purifiers offer superior performance through the combination of a powerful fan, quiet motor, and advanced filtration technology to deliver and maximize airflow while minimizing noise. Our medical-grade filters capture particles as small as 0.1 micron, removing even the tiniest pollutants including dust, pollen, pet dander, mold spores, germs and bacteria, and more. Laser sensor technology detects when particles are present and auto-adjusts fan speed, so you don’t have to. The 5 color coded rings show your indoor air quality at a glance and let you see how Alen is working to clean the air quickly and efficiently. Get real time air quality insights, view historical trends, or control your purifier remotely using the Alen Air app. Alen air purifiers are backed by the industry’s only Forever Guarantee.

The AD3500 Smart air purifier is designed to improve indoor air quality. It rapidly cleans up to 2,520 sq. ft., making it ideal for large bedrooms, kitchens, living rooms, and other larger spaces, using a fully sealed filtration system with a Pre-Filter, Premium Carbon/VOC filter, and UltraHEPA filter. UltraHEPA technology captures 99.99% of airborne particles at 0.003 microns, while the Premium Carbon/VOC filter helps reduce odors, smoke, gases, VOCs, and other everyday household pollutants. Auto Mode and real-time air quality monitoring help maintain cleaner air throughout the day. Smart app connectivity lets you monitor indoor air quality, view AQI, receive alerts, schedule operation, and activate Boost Mode from your phone. Genuine AirDoctor filters are recommended to maintain optimal performance.

Completely refresh your space with the Levoit PlasmaPro® 600S-P Smart Air Purifier. The air purifier quickly refreshes large areas, like an apartment or loft up to 2,956 sq ft (1 ACH), with its aerodynamic air duct design and spiral 360° airflow. The 3-stage filtration system includes a Pre-Filter, Main Filter, and Custom High-Efficiency Activated Carbon Filter. Together, they capture at least 99.97% of airborne particles down to 0.3 microns and help remove smoke, fumes, VOCs, and household odors. Use the VeSync app to create schedules, connect to voice assistants, check filter life, control settings, receive real-time air quality updates, and more.

The Blueair Blue Pure 311i Max smart air purifier is designed for bedrooms, living rooms, and medium-size homes that need powerful air cleaning. Using advanced HEPASilent™ dual filtration technology, it captures 99.97% of airborne particles such as dust, pollen, pet dander, mold particles, and smoke, helping improve indoor air quality. Capable of cleaning up to 439 square feet in about 12.5 minutes or up to 2,107 square feet in 1 hour, the Blue Pure 311i Max is ideal for bedrooms, apartments, home offices, and households with pets or allergy concerns. The purifier combines mechanical and electrostatic filtration to efficiently remove airborne pollutants while maintaining strong airflow and quiet performance. Blueair’s HEPASilent technology helps deliver high filtration efficiency with lower energy use and less noise compared with traditional HEPA filtration systems. With a Clean Air Delivery Rate (CADR) of 250 for smoke, dust, and pollen, the Blue Pure 311i Max quickly circulates and refreshes indoor air, helping maintain cleaner air throughout your space. Smart sensors monitor indoor air quality and automatically adjust fan speed when pollution levels rise. Through the Blueair mobile app, you can track air quality, control settings remotely, and receive filter replacement reminders for easy maintenance. Designed for everyday living, the Blue Pure 311i Max features quiet operation and a compact Scandinavian-inspired design with 360° air intake, allowing it to blend seamlessly into bedrooms, living rooms, and home offices while efficiently circulating clean air. Whether you’re managing pet dander, seasonal allergies, smoke particles, or everyday dust, the Blueair Blue Pure 311i Max helps create a cleaner, more comfortable indoor environment.
| Pros for Alen - BreatheSmart 45i 800 SqFt Air Purifier with Pure HEPA Filter for Allergens, Dust & Mold - Oak | |||
|---|---|---|---|
| Overall Performance, Noise Level, Air Purification | There were no pros for this product— | Air Quality, Noise Level, Overall Performance, Ease of use, Odor Removal | Noise Level, Air Quality, Overall Performance, Ease of use, Design |
| Cons for Alen - BreatheSmart 45i 800 SqFt Air Purifier with Pure HEPA Filter for Allergens, Dust & Mold - Oak | |||
| There were no cons for this product— | There were no cons for this product— | There were no cons for this product— | WiFi Connectivity |



















































