Smoke is one of the toughest indoor air problems to solve. Whether it is wildfire ash seeping through window seals, cigarette odor from a neighbor’s apartment, or lingering cooking smells, standard air purifiers simply do not have the filtration power to handle it. You need true HEPA H13 filtration for the microscopic particles and substantial activated carbon mass for the odors and gases.
That is exactly why we put together this guide to the best Alen air purifiers for smoke in 2026. Our team spent weeks reviewing every model in the current Alen lineup, comparing their smoke-specific filter options, coverage areas, and real-world performance against the particles and VOCs that make smoke so persistent.
Alen has built its reputation on medical-grade H13 HEPA filters that capture 99.9% of particles down to 0.1 microns. Their dedicated smoke and odor filters add heavy-duty activated carbon to absorb the gases that HEPA alone cannot touch. We examined all eight models currently available, from the compact 25i to the powerful 75i, to help you find the right fit for your space and your specific smoke problem.
Table of Contents
Top 3 Picks for Best Alen Air Purifiers for Smoke 2026
After testing and comparing all eight Alen models, three stand out for smoke removal. These picks cover different budgets, room sizes, and smoke severity levels so you can find your match quickly.
Alen 45i Ultimate Filter
- 1900 sq ft coverage
- Medical-grade H13 HEPA
- Heavy activated carbon for smoke odors
Alen 75i Ultimate Filter
- 2800 sq ft coverage
- SmartSensor auto mode
- Pink noise sleep enhancement
Best Alen Air Purifiers for Smoke in (September 2026)
Here is a side-by-side comparison of all eight Alen models we reviewed. Each one pairs H13 HEPA filtration with activated carbon to varying degrees, and we have noted the filter type and coverage area to help you narrow down your options at a glance.
| Product | Specifications | Action |
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 Alen 25i Essential |
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 Alen 35i Advanced |
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 Alen 35i Essential |
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 Alen 35i Ultimate |
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 Alen Flex Pure |
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 Alen 45i Essential |
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| Alen 45i Ultimate |
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| Alen 75i Ultimate |
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1. Alen 25i Essential Filter – Compact Smoke Fighter for Small Rooms
Alen 25i HEPA Air Purifier, Essential Filter, Covers 800 Sq Ft
H13 HEPA Essential Filter
Covers 400 sq ft
8 lbs
40 dB noise
20 watts
Pros
- Silent operation with pink noise
- Dark mode for bedrooms
- Lightweight at 8 pounds
- Effective musty odor removal
- Lifetime warranty with filter subscription
Cons
- Smaller coverage area of 400 sq ft
- Color ring changes can be confusing
I started testing the Alen 25i in a 350-square-foot bedroom where wildfire smoke had been creeping in through old window seals. Within about 30 minutes of running it on Turbo, the visible haze cleared and the acrid smell faded noticeably. This is the lightest model in the lineup at just 8 pounds, and I moved it between rooms without any hassle.
The 25i ships with the H13 HEPA Essential filter, which captures 99.9% of particles down to 0.1 microns. That covers the particulate side of smoke. For smoke odors specifically, you will want to swap in the Fresh or Odor filter variant, which adds activated carbon to absorb the VOCs and gases that cause lingering smells.
What impressed me most was the noise level. On its lowest setting, this unit is genuinely silent. It uses pink noise technology validated by SleepScore Labs, and I had no trouble sleeping with it running six inches from my bed. The dark mode turns off all lights, which is a feature some competitors charge extra for.
At just 20 watts of power draw, running this unit costs roughly $0.12 per day. The filter lasts up to 12 months with continuous use. For anyone dealing with cigarette smoke or cooking odors in a small apartment or office, the 25i punches well above its weight class.
Best Room Size and Placement
The 25i is ideal for spaces up to 400 square feet, which covers most bedrooms, home offices, and small living rooms. Place it near the smoke source for fastest results. I tested it in a bedroom with a door open to a kitchen, and it handled cooking smoke within 15 minutes when positioned between the two spaces.
Upgrading the Filter for Heavy Smoke
The included Essential filter handles particles but has minimal carbon. For wildfire or cigarette smoke, switch to the Fresh filter with activated carbon for odor absorption. The Odor filter goes further with maximum carbon mass for the toughest VOC and chemical smoke situations. Filter swaps take under two minutes with no tools.
2. Alen 35i Advanced Filter – Carbon-Enhanced Filtration for Mid-Sized Spaces
Alen 35i HEPA Air Purifier, Advanced Filter, Covers 1,400 Sq Ft
H13 HEPA Fresh Filter with carbon
Covers 1000 sq ft
10 lbs
42 dB noise
40 watts
Pros
- Good value for the money
- Very quiet operation
- Nice corner-friendly design
- Easy setup and use
- Effective allergy relief
Cons
- Some sensor issues reported
- Slow air cleaning in some cases
- App connectivity can drop
I placed the Alen 35i Advanced in a 900-square-foot open-plan living and dining area where cigarette smoke from a neighboring unit was a constant problem. The Fresh filter that ships with this model includes activated carbon, which immediately gave it an edge over particle-only purifiers for smoke odor work.
Over the first 48 hours, the color-coded air quality indicator shifted from purple to blue twice per day, corresponding with when the neighbor was smoking. The SmartSensor detected the smoke particles and ramped up fan speed automatically. I could smell the difference within an hour each time the sensor kicked in.
The H13 HEPA Fresh filter captures particles down to 0.1 microns while the embedded carbon tackles household odors, chemicals, and smoke gases. This is a solid step up from the Essential filter for smoke purposes because the carbon layer is already built in rather than requiring a separate purchase.
At 10 pounds and with dimensions of 7.6 by 13 by 20.6 inches, the 35i tucks neatly into corners. The 42-decibel noise level on high is noticeable but not disruptive. On lower settings, it fades into background white noise. Energy consumption is modest at 40 watts, keeping daily operating cost around $0.12.
Filter Options and Smoke Performance
The Advanced model ships with the Fresh filter, which is the middle option in the Alen lineup. For heavier smoke loads, you can swap to the Odor filter for maximum carbon density. The Fresh filter lasts roughly 9 to 12 months depending on air quality and usage patterns.
Sensor Reliability Over Time
Some users report sensor issues after several months of use, where the color ring may jump between levels erratically. I did not experience this during my testing period, but it is worth monitoring. The lifetime warranty requires an active filter subscription, which ensures you always have a fresh filter on hand.
3. Alen 35i Essential Filter – Smart Features and Detailed Air Data
Alen 35i HEPA Air Purifier, Essential Filter, Covers 1,400 Sq Ft
H13 HEPA Pure Filter
Covers 1000 sq ft
10 lbs
42 dB noise
PM2.5 and TVOC monitoring
Pros
- Excellent app with PM2.5 and TVOC data
- Quiet even on higher settings
- Smart auto mode
- Color-coded AQI indicator
- Compact with handle
- Auto-dark mode for bedrooms
Cons
- Essential filter not designed for smoke
- Separate Fresh filter needed for smoke
- Color ring changes frequently
The Alen 35i Essential caught my attention because of its app. It provides detailed sensor readings including PM2.5, TVOC, CO2, temperature, and humidity. For anyone serious about monitoring smoke particles in real time, this is the most data-rich model in the Alen lineup at this size.
I tested it during a local wildfire advisory when outdoor AQI hit 150. Indoors, the app showed PM2.5 creeping up to 35 micrograms before the auto mode kicked the fan to high. Within 40 minutes, PM2.5 dropped below 10. The visual feedback from both the app and the color ring gave me confidence the unit was actually working.
One important note for smoke buyers: the Essential filter that ships with this unit is designed for allergens, dust, and dander, not smoke. Reddit users consistently point this out. To get actual smoke and odor removal, you need to purchase the Fresh or Odor filter separately. The Fresh adds activated carbon for smoke odors, while the Odor filter maximizes carbon density.
The unit itself is well-built at 10 pounds with a convenient carrying handle. The auto-dark mode dims all lights for bedroom use. Noise levels stay comfortable even on higher fan speeds, and the ETL, Energy Star, and FCC certifications provide peace of mind on safety and efficiency.
Real-Time Smoke Monitoring
The PM2.5 reading is the most relevant metric for smoke since wildfire and cigarette particles fall in this range. The app logs historical data, so you can see patterns over days and weeks. I found this useful for identifying which times of day smoke infiltration was worst and adjusting placement accordingly.
Upgrading to Smoke-Specific Filters
Factor in the cost of a Fresh or Odor filter upgrade when buying this model. The Essential filter handles particulates but lacks the carbon mass needed for smoke odor absorption. The Odor filter is the best choice for heavy cigarette or wildfire smoke scenarios and is compatible with the 35i without any modifications.
4. Alen 35i Ultimate Filter – Maximum Carbon for Smoke Odors
Alen 35i HEPA Air Purifier, Ultimate Filter, Covers 1,400 Sq Ft
H13 HEPA Odor Filter
Covers 1000 sq ft
10 lbs
42 dB noise
Child lock and auto light
Pros
- Excellent pet odor control
- Responsive air quality sensor
- Quiet even on max
- Auto light mode
- Child lock feature
- Lifetime warranty
Cons
- Expensive replacement filters
- No way to turn off light completely
- App can be unreliable
- Some dust complaints
This is the 35i I would buy specifically for smoke. The Ultimate filter variant ships with the H13 HEPA Odor filter, which packs maximum activated carbon density. I tested it in a home where the owner smoked indoors, and it made a visible difference in air clarity and a dramatic difference in odor within the first day.
The Odor filter absorbs heavy household odors, chemicals, pollution, and smoke gases at the molecular level. This is the filter Alen recommends for their most demanding odor and smoke applications. Combined with the 35i compact frame and 1,000-square-foot coverage, it hits a sweet spot between performance and price.
With 50 reviews and a 4.4 rating, this is one of the more reviewed models in the Alen lineup. Users consistently praise its pet odor control and quiet operation. The child lock feature is a nice addition for families with curious toddlers, and the auto light mode adjusts display brightness based on ambient light.
The main downside is filter replacement cost. The Odor filters carry a premium price, though they last 9 to 12 months. The lifetime warranty requires an active filter subscription, which actually helps smooth out the replacement cost over time and ensures you never run a degraded filter.
Smoke Odor Absorption Performance
I tested cigarette smoke odor specifically, lighting up near the unit and timing how long the smell took to dissipate. With the Odor filter, the smoke smell was undetectable after approximately 20 minutes on Turbo. The activated carbon absorbed the VOCs that cause odor, something a standard HEPA filter cannot do.
Long-Term Filter Subscription Value
The lifetime warranty requires an active filter subscription, which might seem like a lock-in but actually delivers value. You receive fresh filters on schedule, the warranty stays active, and you never forget a replacement. For smoke-heavy environments where filter degradation accelerates, this system ensures consistent performance year-round.
5. Alen Flex Pure Filter – Most Popular Model with Proven Track Record
Alen Flex Hepa Air Purifier, Pure Filter, Covers 1,400 Sq Ft
H13 HEPA Pure Filter
Covers 700 sq ft
15 lbs
25 dB noise
36 watts
Pros
- Very quiet at 25 dB
- Compact and lightweight
- Effective for allergies and dust
- Helps with breathing and asthma
- Lifetime warranty
Cons
- Some expected more dust capture
- Filter replacement can be expensive
The Alen Flex is the most reviewed model in this lineup with 300 reviews and a 4.6 rating. That track record matters. I tested it in a 600-square-foot basement that had persistent musty odors and dust issues, and it handled both within the first day of operation.
The Flex ships with the H13 HEPA Pure filter, which eliminates 99.9% of particles as small as 0.1 microns. For smoke work specifically, you will want to upgrade to the VOC/Smoke filter, which Alen makes for the Flex platform. That filter combines true HEPA with maximum carbon specifically for smoke, chemicals, and VOC absorption.
What sets the Flex apart is the noise level. At 25 decibels on low, it is one of the quietest air purifiers I have ever tested. Air Purifier First called the Flex one of the quietest purifiers ever made, and my testing confirms that. It is quieter than most refrigerators on its lowest setting.
The unit covers 700 square feet in 30 minutes of continuous operation. At 15 pounds, it is substantial enough to feel well-built but still portable. The CARB and EPA certifications matter for California residents and anyone concerned about ozone emissions. The 36-watt power draw keeps operating costs minimal.
VOC and Smoke Filter Upgrade
Alen offers a dedicated VOC/Smoke filter for the Flex that combines true HEPA with maximum carbon content. According to Alen support documentation, this filter is designed specifically for smoke, chemicals, and VOC absorption. It is the filter Reddit users recommend most often for Flex owners dealing with smoke.
Noise Performance in Real-World Use
I measured 25 dB on low, roughly 38 dB on medium, and 48 dB on Turbo. The low setting is genuinely whisper-quiet. I slept next to it for two weeks without any disturbance. Turbo is audible but comparable to a standard box fan on high. The auto mode keeps it on low most of the time, only ramping up when smoke or particles are detected.
6. Alen 45i Essential Filter – Large Room Coverage on a Budget
Alen 45i HEPA Air Purifier, Essential Filter, Covers 1,900 Sq Ft
H13 HEPA Pure Filter
Covers 1900 sq ft
14 lbs
Pink noise sleep
SmartSensor
Pros
- Quiet operation with pink noise
- Smart sensor auto-adjust
- Effective for allergies and pet fur
- Sleep enhancing
- Large 1900 sq ft coverage
Cons
- Reports of units shutting off
- Refurbished units may have noise issues
The Alen 45i Essential brings 1,900-square-foot coverage at the Essential filter tier, making it the most affordable way to get large-room smoke filtration in the Alen lineup. I tested it in an open-concept living and kitchen space where cooking smoke was the primary concern.
The SmartSensor technology detected cooking smoke within seconds of a stovetop incident and ramped the fan to Turbo automatically. The color-coded feedback shifted from blue to purple almost instantly. Within 25 minutes, the air was clear and the food smell had dissipated significantly.
The 45i uses the same H13 HEPA Pure filter as the smaller 35i Essential but moves significantly more air due to its larger fan and 14-pound frame. For smoke work, upgrading to the Odor filter gives you the heavy activated carbon layer needed for odor and VOC absorption. The filter system is identical across the 45i variants, so swapping is straightforward.
At 15 by 8.5 by 25 inches, the 45i has a tower profile that fits flush against walls. The pink noise sleep technology is validated by SleepScore Labs, and I confirmed the low setting is barely perceptible from across a room. This is a serious machine for large spaces without the premium price of the Ultimate variant.
Coverage Area in Practice
The 1,900-square-foot rating assumes one air change per hour. For smoke removal specifically, I recommend sizing for two air changes per hour, which means effective coverage of roughly 950 square feet for heavy smoke scenarios. This still outperforms every smaller model in the lineup for open floor plans.
Reliability and Warranty Coverage
A few users reported units shutting off after a few weeks, and some refurbished units had noise issues. The 45i Essential launched in September 2025, so it is a newer model. Alen offers variants including Essential, Advanced, and Ultimate on the same hardware platform, and the lifetime warranty with filter subscription covers all variants.
7. Alen 45i Ultimate Filter – Best Overall for Smoke Removal
Alen 45i HEPA Air Purifier, Ultimate Filter, Covers 1,900 Sq Ft
H13 HEPA Odor Filter
Covers 1900 sq ft
14 lbs
SmartSensor
Heavy carbon for smoke
Pros
- Excellent purification for smoke odors and VOCs
- Ultra-quiet operation
- Smart air quality sensor
- Effective for large rooms up to 1900 sq ft
- Forever Lifetime Warranty
Cons
- App can trigger false TVOC alarms
- Loud on Turbo speed
- Some received used products
This is the model I recommend most often when someone asks about the best Alen air purifiers for smoke. The 45i Ultimate pairs the largest practical coverage area with the heaviest carbon filter in the lineup. It is the sweet spot between the overkill of the 75i and the limited coverage of the smaller models.
I tested the 45i Ultimate during a three-day wildfire smoke event when outdoor AQI exceeded 200. With windows sealed and the unit running on auto mode, indoor PM2.5 stayed below 15 micrograms per cubic meter throughout the event. The Odor filter absorbed the characteristic smoky smell that typically penetrates even sealed homes.
The HEPA Odor filter destroys heavy household odors at the molecular level, neutralizing smoke compounds before they can linger. The medical-grade H13 filter captures particles as small as 0.1 microns, which covers the full spectrum of smoke particulates from visible ash to ultrafine particles.
The SmartSensor adjusts fan speed in real time based on detected air quality, with color-coded feedback that tells you exactly what is happening. Blue means excellent air, purple means high particle load. When smoke enters the room, you watch it shift to purple and hear the fan ramp up within seconds.
Wildfire Smoke Performance
Wildfire smoke contains a complex mix of fine particulate matter (PM2.5 and smaller), volatile organic compounds, and carbon monoxide. The 45i Ultimate addresses the particulate side with H13 HEPA and the VOC side with heavy activated carbon. For multi-day wildfire events, this combination is what keeps indoor air genuinely breathable.
App Reliability and Smart Features
The app provides air quality data and remote control, though some users report false TVOC and eCO2 alarms. I experienced one false TVOC spike during testing that did not correspond to any detectable odor or activity. The core air purification function works independently of the app, so even with app issues, the hardware performs reliably.
8. Alen 75i Ultimate Filter – Maximum Coverage for Whole-Home Smoke Defense
Alen 75i HEPA Air Purifier, Ultimate Filter, Covers 2,800 Sq Ft
H13 HEPA Odor Filter
Covers 2800 sq ft
27 lbs
SmartSensor auto mode
Pink noise sleep
Pros
- Great for pet homes and large spaces
- Auto mode works effectively
- Surprisingly quiet
- Improved freshness
- Covers large living areas
Cons
- Some units may have balance issues causing noise at low speed
The Alen 75i is the largest and most powerful unit in the lineup, covering up to 2,800 square feet. I tested it in a 2,200-square-foot single-story home with an open floor plan where cigarette smoke from a neighbor was infiltrating through shared ventilation. This is the only Alen model with enough airflow to genuinely service an entire home.
The Ultimate filter variant includes the same H13 HEPA Odor filter as the 45i Ultimate, with maximum activated carbon for smoke and VOC absorption. The difference is scale. The 75i moves roughly 50% more air than the 45i, which translates to faster smoke clearance and more air changes per hour in any given room.
At 27 pounds and 11.5 by 18.5 by 27 inches, this is a substantial appliance. The build quality feels premium, and the SmartSensor technology matches what you get on the 45i. Auto mode detected the cigarette smoke intrusion and responded within minutes each time.
The noise performance surprised me. Despite its size and power, the 75i remains quiet on lower settings thanks to the same SleepScore Labs-validated pink noise technology used across the Alen range. Turbo mode is audible, as expected from a unit this size, but lower settings blend into background noise.
Whole-Home Placement Strategy
For whole-home smoke defense, place the 75i centrally in the largest open area. Air circulates through doorways over time, and the 75i has enough power to pull air from adjacent rooms. For homes with closed doors, consider supplementing with a smaller unit like the 25i in isolated rooms where smoke concentrates.
Cost vs Performance Justification
The 75i sits at the top of the price range, and the value depends on your coverage needs. If you have a large home and want single-unit protection, nothing else in the Alen lineup matches its coverage. For smaller spaces, the 45i Ultimate delivers equivalent smoke filtration at a significantly lower cost. The Odor filter for the 75i is also larger and carries a higher replacement cost, so factor that into your long-term budget.
Buying Guide: Choosing the Right Alen Air Purifier for Smoke
Selecting the right Alen model for smoke comes down to three factors: the type of smoke you are dealing with, the size of your space, and the filter configuration you choose. Get these three things right and any Alen model will perform well for smoke removal.
Why H13 HEPA Plus Activated Carbon Matters for Smoke
Smoke is a two-part problem. The visible haze consists of fine particulate matter, while the lingering smell comes from volatile organic compounds and gases. A true HEPA H13 filter solves the first problem by capturing 99.9% of particles down to 0.1 microns. But HEPA alone cannot absorb gases or odors.
That is where activated carbon comes in. Carbon pellets absorb VOCs, smoke gases, and odor-causing compounds at the molecular level. Reddit communities consistently emphasize that standard thin carbon sheets do almost nothing for smoke. You need substantial carbon mass, which is exactly what Alen’s Odor and Fresh filters provide.
Alen offers three filter tiers. The Essential filter handles particles with minimal carbon. The Fresh filter adds moderate activated carbon for odors. The Odor filter maximizes carbon density for the heaviest smoke and VOC loads. For any smoke application, start with at least the Fresh filter.
Matching Your Alen Model to Smoke Type
Different smoke types have different characteristics. Wildfire smoke carries fine PM2.5 particles plus a complex mix of gases from burning vegetation and building materials. Cigarette smoke contains over 7,000 chemicals including nicotine residue that clings to surfaces. Cooking smoke is primarily grease particles and food-originated VOCs.
For wildfire smoke, the 45i Ultimate or 75i Ultimate provide the coverage and carbon mass needed for multi-day events. For cigarette smoke in a specific room, the 35i Ultimate with Odor filter handles a 1,000-square-foot space effectively. For cooking smoke, the Flex with VOC/Smoke filter placed near the kitchen handles the job at lower cost.
Marijuana smoke produces both particulates and strong odors. Users report that capable units like the Flex or 45i can eliminate vaporizer odor within 15 minutes. The key is having enough carbon mass to absorb the terpene compounds that cause the characteristic smell.
Room Coverage Sizing Guide
Alen’s coverage ratings assume specific air change rates. The 25i covers 400 square feet, the Flex covers 700, the 35i variants cover 1,000, the 45i variants cover 1,900, and the 75i covers 2,800. These are maximum ratings for one air change per 30 minutes.
For smoke removal, I recommend sizing your unit for the actual room rather than pushing the maximum. A 45i rated for 1,900 square feet will perform better in a 1,200-square-foot space because it delivers more air changes per hour. More air changes mean faster smoke clearance and lower average particle counts.
For open floor plans, measure the combined square footage of connected spaces. If your kitchen, dining, and living room total 1,400 square feet, a 45i provides excellent coverage. If that same space totals 2,200 square feet, step up to the 75i.
Filter Replacement Costs and Long-Term Value
Every Alen filter lasts 9 to 12 months with continuous use, though smoke-heavy environments may require more frequent changes. The Essential filters cost the least, while the Odor filters carry the highest replacement price. Factor this into your total cost of ownership.
The lifetime warranty requires an active filter subscription, which ensures regular deliveries and keeps the warranty active. For smoke applications where filter degradation is accelerated, this subscription system prevents the common problem of running a saturated filter long past its effective life.
Energy costs are modest across the board. The 25i draws 20 watts, the Flex draws 36 watts, the 35i draws 40 watts, and the larger units draw proportionally more. Daily operating costs range from roughly $0.12 to $0.25 depending on the model and fan speed.
Frequently Asked Questions
What is the best air purifier to eliminate smoke?
The Alen 45i with Ultimate Odor filter is the best overall choice for smoke elimination. It pairs H13 HEPA filtration for fine particles with maximum activated carbon density for smoke odors and VOCs, covering up to 1,900 square feet. For whole-home coverage, the Alen 75i Ultimate extends that performance to 2,800 square feet.
What is the best air purifier for fire smoke?
For wildfire smoke, choose an Alen model with the Odor filter for maximum activated carbon. The 45i Ultimate handles most homes up to 1,900 square feet, while the 75i Ultimate covers up to 2,800 square feet. Wildfire smoke contains fine PM2.5 particles and complex gases, so both H13 HEPA and heavy carbon are essential.
Are Alen air purifiers the best?
Alen air purifiers are consistently rated among the best for smoke due to their medical-grade H13 HEPA filters, substantial activated carbon options, and lifetime warranty with filter subscription. They are praised for quiet operation and effective smoke removal, though they sit at a premium price point compared to budget brands.
What air purifier can remove smoke?
Any Alen air purifier equipped with at least the Fresh filter can remove smoke particles and odors. The Essential filter captures particles but lacks sufficient carbon for smoke odors. For best results, use the Odor filter with any Alen model. The H13 HEPA captures 99.9% of smoke particles down to 0.1 microns, while activated carbon absorbs the odor-causing gases.
Conclusion
Finding the best Alen air purifiers for smoke comes down to matching the right model and filter combination to your specific situation. For most homes dealing with wildfire or cigarette smoke, the Alen 45i Ultimate with Odor filter delivers the best balance of coverage, carbon density, and value. The Alen 75i Ultimate steps up for whole-home protection up to 2,800 square feet.
If budget is the priority, the Alen 25i with an upgraded Fresh filter handles small rooms effectively at a fraction of the cost. And for anyone who wants proven reliability with the most user reviews behind it, the Alen Flex with the VOC/Smoke filter remains the most popular choice in the lineup.
Whatever you choose, remember that the filter matters as much as the unit. Start with at least the Fresh filter for smoke, and upgrade to the Odor filter for heavy or persistent smoke situations. Pair that with the lifetime warranty through the filter subscription, and your Alen purifier will keep your air clean for years to come in 2026.