BreatheSmart 35i Air Purifier
#22
Alen

Alen BreatheSmart 35i Air Purifier

Rating

Model: BreatheSmart 35i
$284(incl. tax)Amazon price as of 2025-09-02
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Product Overview

The Alen BreatheSmart 35i Air Purifier features a medical-grade H13 HEPA filter with odor neutralization, suitable for spaces between 500-1,000 sq. ft. It combines a powerful fan, quiet motor, and advanced filtration to maximize airflow while minimizing noise. The SmartSensor adjusts fan speed based on air quality, indicated by color-coded feedback. It also emits pink noise to enhance sleep quality.

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Product Specifications

Applicable Area
1000sq ft
CADR (Smoke)
-CFM
CADR (Dust)
-CFM
CADR (Pollen)
-CFM
Filter Type
HEPA
Number of Fan Speeds
-
Noise Level (Min)
-dB
Noise Level (Max)
42dB
Power Consumption
40W
Smart Features
Yes

Size & Weight

Weight
10 pounds
Hight
20.6"
Width
13"
Depth
7.6"

Features

Odor Sensor Function

The Alen BreatheSmart 35i includes an odor neutralizer filter, effectively capturing and neutralizing unpleasant smells. This feature is particularly useful in homes with pets, cooking odors, or other sources of unwanted scents, ensuring a fresher and more pleasant indoor environment.

Dust Sensor Function

The SmartSensor technology in the Alen BreatheSmart 35i detects dust particles and automatically adjusts the fan speed to maintain optimal air quality. This ensures that the purifier responds efficiently to changes in air quality, providing consistent and effective dust removal.

PM2.5 Display Function

The Alen BreatheSmart 35i does not have a dedicated PM2.5 display. Instead, it uses color-coded rings to indicate overall air quality. While it provides a general sense of air quality, it lacks the precise numerical data offered by a PM2.5 display.

Filter Replacement Indicator Function

The Alen BreatheSmart 35i uses a light indicator to show filter condition. This ensures timely filter replacement, maintaining optimal air purification performance and preventing reduced efficiency due to clogged filters. Regular filter replacement is essential for consistent air quality.

Child Lock Function

The Alen BreatheSmart 35i does not have a child lock function. This could be a concern for households with young children, as they may accidentally alter the settings or turn off the purifier. Consider this limitation if child safety is a priority.

Sleep Mode Function

The Alen BreatheSmart 35i features a sleep mode that operates quietly and emits pink noise, optimizing lower octave frequencies for a restful night. This makes it an excellent addition to bedrooms, ensuring undisturbed, quality sleep for those sensitive to noise.

SHOPSTAFF Rating Score

#22
Ranked #22 out of 100 products in Category
4.1
Overall Rating

The Alen BreatheSmart 35i is a good option for bedrooms and smaller living spaces. It offers a smart sensor and quiet operation, but lacks advanced features found in higher-end models. It's positioned as a mid-range purifier with a focus on sleep enhancement.

Coverage Area (CADR)
4.0
The Alen BreatheSmart 35i is designed for rooms up to 1000 sq. ft., making it suitable for medium to large-sized rooms. Its coverage is adequate for bedrooms, living rooms, and offices, ensuring effective air purification within the specified area.
HEPA Filter Quality and Type
4.5
Equipped with a medical-grade H13 HEPA filter, the BreatheSmart 35i captures 99.97% of particles as small as 0.1 micron. This ensures high-quality air purification, removing dust, pollen, pet dander, and other allergens effectively.
Pre-filter and Filter Replacement
3.0
The product information does not specify if the pre-filter is washable. Filter replacement is necessary, but the frequency and cost are not clearly outlined, which may lead to additional expenses over time. Consider filter replacement costs.
Activated Carbon Filter (Odor Removal)
4.0
The BreatheSmart 35i includes an odor neutralizer, which helps in removing household odors, chemicals, and VOCs. This feature is particularly beneficial for pet owners and those sensitive to smells, ensuring a fresher indoor environment.
Noise Level
4.5
With a noise level of 42 dB, the Alen BreatheSmart 35i operates quietly, making it suitable for bedrooms and offices. Its ultra-quiet operation and pink noise emission enhance sleep quality, ensuring undisturbed rest.
Air Quality Sensor and Auto Mode
4.5
The SmartSensor automatically adjusts the fan speed based on real-time air quality, optimizing performance and energy consumption. The color-coded feedback provides a quick visual indication of the air quality, enhancing user convenience.
Manufacturer Reliability and Warranty
4.0
Alen specializes in air purification and has a good reputation. While specific warranty details are not provided, the brand's focus on air quality and customer satisfaction suggests reasonable reliability and support.
Cost Performance
4.0
Priced at $284, the Alen BreatheSmart 35i offers a good balance of features and performance. Its coverage area, HEPA filter quality, and smart sensor make it a worthwhile investment for those seeking improved air quality in medium-sized rooms.

Brand & Manufacturer Details

Alen
Alen specializes in air purification providing a lifetime of protection with a unique design. Each purifier has a large internal fan, cleaning the air in a large room quickly.

Key Highlights

  • Quiet operation
  • SmartSensor adjusts fan speed
  • Odor neutralization

Considerations

  • Ensure proper filter installation
  • Monitor air quality for optimal performance
  • Replace filters as recommended

Recommended For

  • Individuals with allergies
  • Pet owners
  • Those seeking sleep enhancement

Not Recommended For

  • Those with limited space
  • Individuals on a tight budget
  • none in particular

Suitable For

  • Bedrooms
  • Living rooms
  • Offices

Not Suitable For

  • Small apartments
  • Cars
  • Outdoor use

Frequently Asked Questions (FAQ)

Q.I'm concerned about odors from pets and cooking. Will this air purifier effectively remove those smells?
A.Yes, the Alen BreatheSmart 35i Air Purifier includes an H13 HEPA air purifier odor filter designed to absorb heavy household odors, chemicals, and pollutants. It neutralizes unpleasant odors from pets, cooking, and other sources. Staff confirmation indicates it is effective at filtering smells.
Q.I have allergies and need an air purifier that can capture small particles. How small of particles can this purifier filter?
A.The Alen BreatheSmart 35i Air Purifier uses H13 HEPA filters that capture particles as small as 0.1 micron. This includes dust, pollen, germs, bacteria, and other tiny pollutants, making it suitable for allergy sufferers.
Q.Is this air purifier suitable for use while sleeping?
A.Yes, the BreatheSmart 35i is designed for sleep enhancement. It operates quietly and emits pink noise, which can optimize lower octave frequencies for a restful night's sleep. Staff confirmation mentions its quiet operation being great for sleep.
Q.How energy efficient is this air purifier? I plan to run it 24/7.
A.Alen air purifiers are designed to be energy efficient and can run 24/7. The total energy cost is approximately $0.12 per day.
Q.I have a large living room of about 900 sq. ft. Will this air purifier be effective in that space?
A.Yes, the BreatheSmart 35i is ideal for spaces up to 1000 sq. ft. It efficiently circulates air, making it suitable for large bedrooms, living rooms, and dining rooms.
Q.Does this air purifier have an automatic mode that adjusts the fan speed based on air quality?
A.Yes, the Alen BreatheSmart 35i features a SmartSensor that automatically adjusts the fan speed based on the detected air quality. Color-coded rings provide visual feedback on the air quality level.
Q.Can I control this air purifier remotely?
A.Yes, you can control the BreatheSmart 35i remotely using the Alen Air app. This allows you to view real-time air quality insights, historical trends, and adjust settings from your device.
Q.How often do the filters need to be replaced, and how much do replacement filters cost?
A.The filter replacement frequency will depend on usage and air quality conditions. Replacement filters cost over $50 each. Consider signing up for the refill subscription to receive new filters when needed.
Q.I am concerned about the noise level of the air purifier. Is it very loud?
A.The Alen BreatheSmart 35i is designed for quiet operation. Staff confirmation notes that it is quiet, even at higher settings. The noise level is approximately 42 dB.
Q.Is this product worth the money?
A.The Alen BreatheSmart 35i has received staff confirmation of high quality, praising its effectiveness in filtering smells and improving air quality. However, one staff confirmation notes that it may not work better than units that are half the price. Consider your specific needs and budget when making a decision.

SHOPSTAFF Rating Ranking

#1

BLUEAIR

Blue Signature 112929

$359(incl. tax)Amazon price as of 2025-09-02

Large room air purifier with 7-stage filtration, smart features, and doubles as a table with Swedish-inspired design.

Applicable Area3385 sq ftCADR (Smoke)- CFM
CADR (Dust)- CFMCADR (Pollen)- CFM
Filter TypeActivated CarbonNumber of Fan Speeds-
Noise Level (Min)- dBNoise Level (Max)35 dB
Power Consumption4 WSmart FeaturesYes
Odor Sensor FunctionDust Sensor FunctionPM2.5 Display FunctionFilter Replacement Indicator FunctionChild Lock FunctionSleep Mode Function
4.6Overall Rating
4.8Coverage Area (CADR)
4.7HEPA Filter Quality and Type
4.0Pre-filter and Filter Replacement
4.6Activated Carbon Filter (Odor Removal)
4.7Noise Level
4.9Air Quality Sensor and Auto Mode
4.5Manufacturer Reliability and Warranty
4.2Cost Performance
#2

Coway

AP-2015F Airmega 400 Smart Air Purifier

$366(incl. tax)Amazon price as of 2025-09-02

Smart air purifier with HEPA filter, auto mode, and filter alerts, designed for spaces up to 1,560 sq. ft.

Applicable Area1560 sq ftCADR (Smoke)- CFM
CADR (Dust)- CFMCADR (Pollen)- CFM
Filter TypeTrue HEPA, Active Carbon Filter, Pre-FilterNumber of Fan Speeds-
Noise Level (Min)22 dBNoise Level (Max)52 dB
Power Consumption66 WSmart FeaturesNo
Odor Sensor FunctionDust Sensor FunctionPM2.5 Display FunctionFilter Replacement Indicator FunctionChild Lock FunctionSleep Mode Function
4.5Overall Rating
4.5Coverage Area (CADR)
4.7HEPA Filter Quality and Type
4.3Pre-filter and Filter Replacement
4.5Activated Carbon Filter (Odor Removal)
4.6Noise Level
4.8Air Quality Sensor and Auto Mode
4.3Manufacturer Reliability and Warranty
4.2Cost Performance
#3

Winix

5510 Air Purifier

$179(incl. tax)Amazon price as of 2025-09-02

WINIX 5510 Air Purifier for Home Large Room Up to 1881 Ft², True HEPA, High Deodorization Carbon Filter.

Applicable Area1881 sq ftCADR (Smoke)- CFM
CADR (Dust)- CFMCADR (Pollen)- CFM
Filter TypeHEPA, CarbonNumber of Fan Speeds-
Noise Level (Min)27 dBNoise Level (Max)- dB
Power Consumption65 WSmart FeaturesAmazon Alexa, Google Assistant
Odor Sensor FunctionDust Sensor FunctionPM2.5 Display FunctionFilter Replacement Indicator FunctionChild Lock FunctionSleep Mode Function
4.5Overall Rating
4.5Coverage Area (CADR)
4.7HEPA Filter Quality and Type
4.3Pre-filter and Filter Replacement
4.5Activated Carbon Filter (Odor Removal)
4.6Noise Level
4.8Air Quality Sensor and Auto Mode
4.0Manufacturer Reliability and Warranty
4.3Cost Performance
#4

Winix

5520 Air Purifier

$189(incl. tax)Amazon price as of 2025-09-02

WINIX 5520 Air Purifier for large rooms up to 1882 Ft² with air quality monitor and true HEPA filter.

Applicable Area1881 sq ftCADR (Smoke)- CFM
CADR (Dust)- CFMCADR (Pollen)- CFM
Filter TypeHEPA, CarbonNumber of Fan Speeds-
Noise Level (Min)27 dBNoise Level (Max)- dB
Power Consumption50 WSmart FeaturesWifi
Odor Sensor FunctionDust Sensor FunctionPM2.5 Display FunctionFilter Replacement Indicator FunctionChild Lock FunctionSleep Mode Function
4.5Overall Rating
4.5Coverage Area (CADR)
4.7HEPA Filter Quality and Type
4.3Pre-filter and Filter Replacement
4.5Activated Carbon Filter (Odor Removal)
4.6Noise Level
4.8Air Quality Sensor and Auto Mode
4.0Manufacturer Reliability and Warranty
4.2Cost Performance
#5

LEVOIT

Air Purifiers Vital 200S-P

$159(incl. tax)Amazon price as of 2025-09-02

LEVOIT Air Purifier for large rooms up to 1875 sq ft with washable pre-filter and air quality monitor.

Applicable Area1875 sq ftCADR (Smoke)250 CFM
CADR (Dust)254 CFMCADR (Pollen)289 CFM
Filter Type3-Stage FilterNumber of Fan Speeds-
Noise Level (Min)- dBNoise Level (Max)- dB
Power Consumption- WSmart FeaturesApp
Odor Sensor FunctionDust Sensor FunctionPM2.5 Display FunctionFilter Replacement Indicator FunctionChild Lock FunctionSleep Mode Function
4.4Overall Rating
4.3Coverage Area (CADR)
4.5HEPA Filter Quality and Type
4.3Pre-filter and Filter Replacement
4.3Activated Carbon Filter (Odor Removal)
4.5Noise Level
4.7Air Quality Sensor and Auto Mode
4.0Manufacturer Reliability and Warranty
4.3Cost Performance