6 Best Alternatives to the Alen 25i Replacement HEPA Filter (2026)
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You may be looking for alen 25i replacement hepa filter alternatives if you need options beyond the original Alen BreatheSmart 25i Advanced HEPA Filter. That filter uses an H13 True HEPA layer to capture 99.9% of particles larger than 0.1 micron in rooms up to 400 square feet. It lasts up to 12 months and fits the BreatheSmart 25i unit with precise dimensions of 9.6 by 12.1 inches.
You might want a different size, a higher filtration grade like H14, or a complete unit instead of just a filter. Some buyers prefer broader room coverage or specific features like sleep modes. The 6 alternatives on this list were chosen because their specifications overlap with the original. This includes compatible filter types, room coverage areas, and physical dimensions that match your needs. Each option here offers a distinct spec profile for your situation.
How these alternatives compare to Alen
MOOKA True HEPA Air Purifier
The MOOKA B-D02L is a complete air purifier, not a replacement filter for your Alen unit. It uses True HEPA filtration to handle larger spaces than the 400 sq ft coverage of the Alen filter. Its dimensions are significantly smaller, measuring 7.7 by 3.94 inches. You get a standalone device for quiet operation in larger rooms. This option suits you if you want a new machine rather than a filter swap. It lacks the specific H13 medical-grade certification of the Alen filter but offers solid coverage for pet owners or smoke removal in bigger areas.
CHIVALZ 2 Pack True HEPA Air Purifier
The CHIVALZ MR2588 is a compact air purifier designed for small bedrooms or dorms. It includes True HEPA filtration to target smoke and other particles. The unit measures 6.02 by 9.69 inches, making it smaller than the Alen filter. You receive two units in this pack, allowing for multi-room coverage. This choice is practical if you need quiet operation and portability. It does not fit the Alen 25i housing. You get a dedicated device for small spaces rather than a replacement part. The footprint is minimal, fitting easily on a nightstand or desk while cleaning the air.
AromaRoom Compact Pet True HEPA Air Purifier
The Aroma Room AP100-D is a standalone purifier focused on pet odor removal. It features True HEPA filtration and includes a sensor and display for air quality feedback. The unit is 6.4 by 10.2 inches. It targets medium-sized rooms rather than the 400 sq ft limit of the Alen filter. You get clear visual feedback on air status, which the Alen filter does not provide. This option is best for pet owners needing odor control. It is not a replacement filter. You receive a full device with sensors, offering a different approach to managing indoor air quality for households with pets.
MOOKA 1300 Sq Ft H13 HEPA Air Purifier
The MOOKA AP-S0610L covers large rooms up to 1300 sq ft, far exceeding the 400 sq ft area of the Alen filter. It uses H13 HEPA filtration for strong particle capture. The device measures 6.7 by 11.1 inches. You get simple controls without smart features, focusing on straightforward air cleaning. This model suits buyers who need extensive coverage for large spaces. It is a complete unit, not a filter replacement. The larger capacity makes it ideal for open areas. You trade the specific fit of the Alen filter for significantly broader room coverage and quiet performance in bigger environments.
VENDFO VF10 H13 HEPA Air Purifier
The VENDFO VF10 is designed for quiet bedroom use with H13 HEPA filtration. It measures 7.83 by 11.2 inches. This unit includes a sleep mode for low-noise operation. It is a standalone purifier, not a replacement for the Alen 25i. You get dedicated sleep features for nighttime air cleaning. The H13 grade matches the Alen filter's efficiency level. This option is practical if you prioritize quiet operation in a bedroom. You receive a complete device with specific sleep settings. It does not fit the Alen housing but offers similar filtration standards in a form factor built for restful environments.
DAYETTE H14 True HEPA Replacement Filter
The DAYETTE H14 filter is a replacement part for DAYETTE AP401 and AP402 units, not the Alen 25i. It uses H14 True HEPA filtration, which offers higher efficiency than the H13 filter in the Alen. The dimensions are 9.33 by 10.2 inches. You get a higher-grade filter for compatible DAYETTE appliances. This option is only suitable if you own a DAYETTE purifier. It does not fit the Alen 25i. You receive an H14 grade filter for superior particle capture in specific DAYETTE models. It is a direct replacement for those units, offering a step up in filtration grade for those specific devices.
Quick picks
Our 7 picks
Alen BreatheSmart 25i Advanced HEPA Filter
Best for: Alen BreatheSmart 25i owners needing H13 filtration
- Room Coverage
- 400 sq ft
- Filter Type
- Medical-grade H13 True HEPA
- Target Pollutant
- Smoke, Allergies, Dust, TVOC
- Dimensions
- 2.2 × 9.6 × 12.1 inches
- Weight
- 1.3 pounds
View on Amazon: Alen BreatheSmart 25i Advanced HEPA Filter Affiliate link
This is a replacement H13 True HEPA filter for the Alen BreatheSmart 25i air purifier. It covers 400 square feet, cleaning that space every 30 minutes. The filter captures 99.9% of particles larger than 0.1 micron, including dust and odors. It lasts up to 12 months. You get genuine parts designed for your specific unit. It is a white, 1.3-pound filter measuring 9.6 by 12.1 inches. Choose this if you want medical-grade filtration for your Alen device.
Pros
- H13 True HEPA layer captures 99.9% of particles over 0.1 micron
- Covers 400 sq ft and cleans the air every 30 minutes
- Lasts up to 12 months for long-term use
- Specifically designed for the Alen BreatheSmart 25i
Cons
- Limited to 400 sq ft coverage area
- Only fits the Alen BreatheSmart 25i model
- Does not include the air purifier unit
Good fit if
- You own an Alen BreatheSmart 25i air purifier
- You need a replacement filter for 400 sq ft rooms
- You want medical-grade H13 filtration for dust and odors
Skip if
- You need a standalone air purifier unit
- You have rooms larger than 400 sq ft
- You use a different brand of air purifier
Verdict: Alen 25i Advanced HEPA Filter is the correct replacement for Alen BreatheSmart 25i owners seeking reliable H13 filtration for small spaces.
MOOKA True HEPA Air Purifier
Best for: large rooms needing quiet HEPA filtration
- Room Coverage
- 1076 ft²
- Filter Type
- True HEPA
- Noise Level
- 20dB
- Operating Modes
- Sleep
- Target Pollutant
- Odor, Smoke, Pet Dander, Dust, Pollen
- Features
- Sleep Mode, Timer, Night Light, Essential Oil Diffuser
View on Amazon: MOOKA True HEPA Air Purifier Affiliate link
The MOOKA B-D02L uses a True HEPA filter to capture particles as small as 0.3 microns, including pet dander and smoke. It covers rooms up to 1076 square feet with one air change per hour. The unit operates at a quiet 20 dB. You will appreciate the four fan modes and timer settings. This model suits those needing broad coverage in large spaces like living rooms or offices.
Pros
- Covers up to 1076 sq ft
- True HEPA filtration captures 0.3 micron particles
- Ultra-quiet 20 dB operation
- Four fan modes and timer settings
Cons
- Only lists Sleep mode in key specs
- Night light cannot be disabled in key specs
- Filter replacement frequency varies by environment
Good fit if
- You need coverage for large rooms
- You prioritize quiet operation for sleep
- You want simple manual controls
Skip if
- You require smart app connectivity
- You need multiple distinct fan speeds listed
- You prefer a compact desktop unit
Verdict: MOOKA B-D02L True HEPA Air Purifier fits large rooms where quiet performance matters. It delivers solid coverage for pet owners or smoke removal.
CHIVALZ 2 Pack True HEPA Air Purifier
Best for: small bedrooms and dorm rooms
- Room Coverage
- Up to 270 sq ft
- Filter Type
- H13 True HEPA
- Noise Level
- 24dB
- Operating Modes
- Sleep Mode
- Room Type
- Bedroom
- Target Pollutant
- Smoke, Pet Dander, Dust, Wildfire Smoke
View on Amazon: CHIVALZ 2 Pack True HEPA Air Purifier Affiliate link
This 2-pack of CHIVALZ air purifiers offers True HEPA filtration for spaces up to 270 square feet. The 3-stage system captures 99.97% of particles as small as 0.3 microns, including smoke and pet dander. It runs at 24dB in sleep mode and includes a built-in aromatherapy feature. You get two units for simultaneous use in bedrooms or dorms. The compact design fits well in smaller rooms where you need quiet, portable purification.
Pros
- True HEPA filter captures 99.97% of 0.3-micron particles
- Covers rooms up to 270 square feet
- Ultra-quiet 24dB sleep mode with light dimming
- Built-in aromatherapy function for scent circulation
- Includes 2 units for multi-room use
Cons
- Limited coverage area of 270 square feet per unit
- No smart app or remote control listed
- Filter replacement required every 3 to 6 months
Good fit if
- You need to purify air in two small rooms simultaneously
- You sleep in a shared space and need ultra-quiet operation
- You want to add essential oils to your air purification routine
Skip if
- You need to purify a large living room over 270 square feet
- You require smart home integration or app control
- You prefer a single unit with a larger coverage area
Verdict: CHIVALZ 2-Pack True HEPA Air Purifier is a practical solution for small spaces like bedrooms or dorms. It suits you if you need quiet operation and multi-room coverage with a compact footprint.
AromaRoom Compact Pet True HEPA Air Purifier
Best for: pet odor removal in medium rooms
- Room Coverage
- Up to 430 sq ft
- Filter Type
- True HEPA
- Air Quality Sensor
- TVOC sensor
- Operating Modes
- Auto Mode
- Target Pollutant
- Odor
- Dimensions
- 6.4 × 6.4 × 10.2 inches
View on Amazon: AromaRoom Compact Pet True HEPA Air Purifier Affiliate link
The Aroma Room AP100-D targets pet odors and dander with a True HEPA filter and activated carbon. It covers up to 430 square feet with 360-degree airflow. A built-in TVOC sensor monitors air quality and displays real-time levels. Smart auto mode adjusts fan speed based on detected pollutants. This unit is designed for homes with pets or smoke concerns.
Pros
- True HEPA and activated carbon filtration for odors
- Covers up to 430 square feet
- Built-in TVOC air quality sensor
- Real-time air quality display
Cons
- Smaller room coverage compared to larger units
- Heavier build at 2.4 pounds
- No remote control mentioned in specifications
Good fit if
- You need to reduce pet odors and dander
- You want real-time air quality monitoring
- You have a room up to 430 square feet
Skip if
- You need coverage for rooms larger than 430 square feet
- You require a remote control for operation
- You prefer a unit under 2.4 pounds
Verdict: Aroma Room AP100-D True HEPA Air Purifier is a practical choice for pet owners needing odor control in medium-sized rooms. Its sensor and display provide clear feedback on air quality.
MOOKA 1300 Sq Ft H13 HEPA Air Purifier
Best for: Large rooms needing quiet, simple filtration
- Room Coverage
- 1,300 sq ft
- Filter Type
- H13 True HEPA
- Noise Level
- 13 dB
- Operating Modes
- Sleep Mode
- Room Type
- Bedroom
- Target Pollutant
- Odor, Smoke, Pet Dander, Dust, Pollen, Wildfire Smoke
View on Amazon: MOOKA 1300 Sq Ft H13 HEPA Air Purifier Affiliate link
The MOOKa AP-S0610L is a black air purifier designed for large rooms up to 1,300 square feet. It uses a three-stage H13 True HEPA filtration system with pre-filter and activated carbon. The unit operates at 13 dB, making it suitable for bedrooms. It includes three fan speeds, timing modes, and a child lock. You get four air changes per hour in a 325-square-foot space.
Pros
- H13 True HEPA filter captures fine particles
- Covers up to 1,300 square feet
- Ultra-quiet operation at 13 dB
- Includes child lock and timing modes
Cons
- No smart app or Wi-Fi connectivity
- No remote control included
- Only three fan speed settings
Good fit if
- You need coverage for a large living area
- You prioritize low noise levels for sleeping
- You want simple physical controls without apps
Skip if
- You require smart home integration
- You need a remote control for convenience
- You prefer more than three fan speeds
Verdict: MOOKa AP-S0610L Large Room Air Purifier fits buyers who need strong coverage for large spaces without needing smart features. It delivers quiet performance and basic controls for straightforward air cleaning.
VENDFO VF10 H13 HEPA Air Purifier
Best for: quiet bedroom air cleaning
- Room Coverage
- 1074 ft²
- Filter Type
- H13 True HEPA
- Noise Level
- under 24dB
- Operating Modes
- Sleep mode
- Room Type
- Bedroom
- Dimensions
- 7.83 × 7.83 × 11.2 inches
View on Amazon: VENDFO VF10 H13 HEPA Air Purifier Affiliate link
The Vendfo VF10 uses an H13 True HEPA filter to clean air in rooms up to 1074 ft². It operates at 24dB in sleep mode, making it suitable for bedrooms. The unit measures 7.83 by 11.2 inches and weighs 3.4 pounds. It includes a night light and child lock. You get a replacement reminder after 2,000 hours of use.
Pros
- H13 True HEPA filtration for enhanced air quality
- 24dB ultra-quiet sleep mode for bedrooms
- Covers spaces up to 1074 ft²
- Child lock prevents incorrect operations
- Filter replacement indicator after 2,000 hours
Cons
- No automatic air quality sensor mentioned
- No remote control or smartphone app
- Manual filter replacement required every 3-6 months
Good fit if
- You need a quiet purifier for a bedroom
- You want H13 HEPA filtration in a compact unit
- You have a room up to 1074 ft²
Skip if
- You need smart home integration or app control
- You require an automatic air quality sensor
- You want a remote control for operation
Verdict: Vendfo VF10 H13 HEPA Air Purifier is a practical choice for bedroom users who prioritize quiet operation and H13 filtration over smart features.
DAYETTE H14 True HEPA Replacement Filter
Best for: DAYETTE AP401 and AP402 owners needing H14 filtration
- Filter Type
- H14 True HEPA
- Dimensions
- 10.2 × 9.33 × 9.33 inches
- Weight
- 1.8 pounds
View on Amazon: DAYETTE H14 True HEPA Replacement Filter Affiliate link
This replacement filter is designed specifically for DAYETTE AP401 and AP402 air purifiers. It features an H14 True HEPA grade that captures 99.997% of particles as small as 0.1 microns. The four-stage system includes a pre-filter, activated carbon layer, and net filter to handle pet hair, smoke, and odors. It weighs 1.8 pounds and measures 9.33 by 9.33 by 10.2 inches. You should use this filter to maintain optimal air quality in your home.
Pros
- H14 True HEPA grade captures 99.997% of particles down to 0.1 microns
- Four-stage filtration includes pre-filter, HEPA, activated carbon, and net filter
- Specifically engineered for DAYETTE AP401 and AP402 models
- Zero harmful ozone emissions during operation
Cons
- Only compatible with DAYETTE AP401 and AP402 units
- Filter cannot be washed with water
- Lifespan varies based on individual household usage
Good fit if
- You own a DAYETTE AP401 or AP402 air purifier
- You want H14 grade filtration for superior particle capture
- You need to remove pet dander, smoke, and cooking odors
Skip if
- You have an air purifier from a different brand
- You own a DAYETTE model other than AP401 or AP402
- You prefer a washable filter for easier maintenance
Verdict: DAYETTE H14 HEPA Filter for AP401/AP402 delivers high-efficiency filtration for owners of compatible DAYETTE units. It is the correct choice if you need to replace your current filter with an H14 grade option for your specific appliance.
Specifications side by side
| Spec | Alen BreatheSmart 25i Advanced HEPA Filter | MOOKA True HEPA Air Purifier | CHIVALZ 2 Pack True HEPA Air Purifier | AromaRoom Compact Pet True HEPA Air Purifier | MOOKA 1300 Sq Ft H13 HEPA Air Purifier | VENDFO VF10 H13 HEPA Air Purifier | DAYETTE H14 True HEPA Replacement Filter |
|---|---|---|---|---|---|---|---|
| Room Coverage | 400 sq ft | 1076 ft² | Up to 270 sq ft | Up to 430 sq ft | 1,300 sq ft | 1074 ft² | not stated |
| Filter Type | Medical-grade H13 True HEPA | True HEPA | H13 True HEPA | True HEPA | H13 True HEPA | H13 True HEPA | H14 True HEPA |
| Noise Level | not stated | 20dB | 24dB | not stated | 13 dB | under 24dB | not stated |
| Air Quality Sensor | not stated | not stated | not stated | TVOC sensor | not stated | not stated | not stated |
| Operating Modes | not stated | Sleep | Sleep Mode | Auto Mode | Sleep Mode | Sleep mode | not stated |
| Room Type | not stated | not stated | Bedroom | not stated | Bedroom | Bedroom | not stated |
| Target Pollutant | Smoke, Allergies, Dust, TVOC | Odor, Smoke, Pet Dander, Dust, Pollen | Smoke, Pet Dander, Dust, Wildfire Smoke | Odor | Odor, Smoke, Pet Dander, Dust, Pollen, Wildfire Smoke | not stated | not stated |
| Features | not stated | Sleep Mode, Timer, Night Light, Essential Oil Diffuser | Sleep Mode, Night Light | not stated | Sleep Mode, Timer, Night Light, Essential Oil Diffuser | Sleep Mode | not stated |
| Dimensions | 2.2 × 9.6 × 12.1 inches | 3.94 × 7.7 × 3.94 inches | 6.02 × 6.02 × 9.69 inches | 6.4 × 6.4 × 10.2 inches | 6.7 × 6.7 × 11.1 inches | 7.83 × 7.83 × 11.2 inches | 10.2 × 9.33 × 9.33 inches |
| Weight | 1.3 pounds | 3.6 pounds | not stated | 2.4 pounds | 3.4 pounds | 3.4 pounds | 1.8 pounds |
| Size | Advanced | Normal | Standard | Normal | 1300 square_feet | Normal | not stated |
| Color | White | White | Black | Pure White | Black | White | Original Filter |
| Model | B2-Advanced | B-D02L | MR2588 | AP100-D | AP-S0610L | VF10-White | AP401/402 original filter |
You can also evaluate argendon filter replacement alternatives to compare physical dimensions and filtration grades across brands.
Frequently asked questions
Can I use a third-party HEPA filter in my Alen 25i?
You should stick to filters designed specifically for your unit to ensure proper fit and airflow. The Alen BreatheSmart 25i Advanced HEPA Filter is the correct replacement for owners seeking reliable H13 filtration. Using non-compatible filters may void warranties or reduce cleaning efficiency in small spaces.
What is the difference between H13 and H14 HEPA filters?
H13 filters capture 99.95% of particles 0.1 microns and larger, while H14 filters capture 99.995%. The Alen BreatheSmart 25i Advanced Filter uses H13 grade media. DAYETTE offers an H14 replacement for their own AP401 and AP402 units, providing higher efficiency for compatible appliances.
Which air purifier is best for large rooms if I need more coverage?
The MOOKa AP-S0610L is designed for large rooms up to 1300 square feet. It uses H13 HEPA filtration and offers quiet performance without smart features. This makes it a practical choice for buyers who need strong coverage for large spaces without needing complex controls or app connectivity.
Are there quiet air purifiers suitable for bedrooms?
Yes, several options prioritize quiet operation. The CHIVALZ 2-Pack True HEPA Air Purifier is practical for small bedrooms and dorms. The VENDFO VF10 also features a sleep mode for quiet bedroom air cleaning. Both units use True HEPA or H13 filtration to maintain clean air during rest.
Which air purifier helps with pet odors in medium-sized rooms?
The Aroma Room AP100-D is a practical choice for pet owners needing odor control in medium-sized rooms. It uses True HEPA filtration and includes a sensor and display for clear air quality feedback. This model targets odor specifically, making it suitable for homes with pets.
How do I know if a filter is True HEPA?
True HEPA filters must meet specific efficiency standards set by testing organizations. Products like the MOOKA B-D02L and CHIVALZ MR2588 list True HEPA in their attributes. The Alen BreatheSmart 25i Advanced Filter also provides reliable filtration. Always check the filter type specification to confirm the grade.
What are the dimensions of the Alen 25i replacement filter?
The Alen BreatheSmart 25i Advanced HEPA Filter measures 9.6 inches in width, 12.1 inches in height, and 2.2 inches in length. It weighs 1.3 pounds. These dimensions ensure it fits correctly into your Alen unit. Compare these specs if you are checking compatibility with other models.
Can I use a DAYETTE filter in an Alen purifier?
No, DAYETTE H14 filters are designed for DAYETTE AP401 and AP402 units. They measure 9.33 inches by 9.33 inches by 10.2 inches. The Alen 25i requires a specific 9.6 by 12.1 inch filter. Using the wrong size will prevent proper installation and air sealing in your device.