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Alen Air Purifiers: Complete Brand Guide and All 4 Models Compared

Alen offers 4 air purifier models across 2 types: Large Room and Smart Wifi. Coverage ranges from 500 sq ft up to 2800 sq ft, making the lineup suited for bedrooms, home offices, living rooms, and kitchens.

Alen holds 5 certifications across its lineup: CARB Certified (meets California Air Resources Board standards, among the strictest air quality regulations in the US), ETL Certified (independently safety-tested by Intertek), Energy Star Certified (EPA-recognized for energy efficiency), FCC Certified (required for devices with wireless connectivity), and Certified Frustration-Free (Amazon's packaging standard for easy, waste-reduced unboxing).

Last updated: . Based on analysis of 4 Alen air purifiers.

Our Top Alen Picks

Hand-picked from 4 models based on specs, features, and category rankings.

About Alen

Alen offers 4 air purifier models across 2 types: Large Room and Smart Wifi. Coverage ranges from 500 sq ft up to 2800 sq ft, making the lineup suited for bedrooms, home offices, living rooms, and kitchens.

Alen holds 5 certifications across its lineup: CARB Certified (meets California Air Resources Board standards, among the strictest air quality regulations in the US), ETL Certified (independently safety-tested by Intertek), Energy Star Certified (EPA-recognized for energy efficiency), FCC Certified (required for devices with wireless connectivity), and Certified Frustration-Free (Amazon's packaging standard for easy, waste-reduced unboxing).

What They Specialize In

Alen focuses on large-room HEPA filtration, with 3 of 4 models in the Large Room category and one Smart Wifi model. All units carry the BreatheSmart name and target allergens, dust, and mold as core use cases.

Filter options vary by model: the 35i uses a HEPA filter with Odor Neutralizer, the 45i uses a Pure HEPA filter, and both the 75i and Flex pair HEPA with a Fresh + Carbon filter for households dealing with smoke and household odors.

Coverage spans 500-1,000 sq ft (35i), 1,400 sq ft (Flex), 1,600 sq ft (45i), and up to 2,800 sq ft (75i).

Which Alen Air Purifier Is Right for You?

Alen's 4 BreatheSmart models cover different room sizes and filtration needs, so the right pick depends on your square footage and whether odor control is a priority.

For Odor, Smoke, and Allergen Control

The BreatheSmart Flex and 75i both pair HEPA with a Fresh + Carbon filter, making them the best choices if smoke or household odors are your main concern. The Flex covers up to 1,400 sq ft, while the 75i extends to 2,800 sq ft for larger living rooms and kitchens.

For Smart Home or App Control

The BreatheSmart 45i is Alen's only Smart Wifi model, offering remote control and monitoring for rooms up to 1,600 sq ft. It uses a Pure HEPA filter focused on allergens, dust, and mold without a carbon layer.

For Smaller Spaces With Odor Issues

The BreatheSmart 35i covers 500-1,000 sq ft and uses a HEPA filter with Odor Neutralizer, making it well-suited for bedrooms or home offices where odor control matters but a carbon filter upgrade is not needed.

Budget Pick

The BreatheSmart 45i is positioned as the best value in the lineup, covering up to 1,600 sq ft with HEPA filtration and Smart Wifi at a lower price than the larger 75i.

Premium Pick

The BreatheSmart 75i is the top-tier option, covering up to 2,800 sq ft with a HEPA and Fresh + Carbon filter combination, and suits large open spaces like living rooms and kitchens.

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Who Buys Alen?

Alen appeals to buyers who need reliable coverage for larger spaces, from 500 sq ft up to 2,800 sq ft. The lineup suits people dealing with allergens, dust, mold, smoke, or household odors across bedrooms, home offices, and open-plan living areas.

The Smart Wifi option on the 45i adds appeal for those who want app or voice control without switching brands. The Energy Star and CARB certifications attract buyers who prioritize energy efficiency and independently verified air quality performance.

All 4 Alen Air Purifiers

Every model in our database, filterable by type, size, and features.

Area (sq ft) -
Noise Max (dB)

How Alen Compares

Alen's lineup covers a wider square footage range than many brands at this tier, from 500 sq ft all the way to 2,800 sq ft within just 4 models.

The combination of 5 certifications, including the stringent CARB standard and Energy Star, gives it a stronger verified-performance story than brands that hold fewer third-party credentials.

The tradeoff is a smaller total model count, so buyers who need highly specialized configurations may find fewer options to choose from.

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Alen FAQ

Common questions about Alen air purifiers.

Is Alen a good air purifier brand?

Alen is a well-regarded air purifier brand with a focused lineup of 4 models, all under the BreatheSmart name, designed specifically around large-room HEPA filtration. Their units target allergens, dust, and mold, and carry 5 certifications including Energy Star (EPA energy efficiency standard) and CARB (California Air Resources Board strict air quality standard). With coverage options from 500 to 2800 sq ft, Alen is a solid choice for buyers who need reliable performance in larger spaces.

What types of air purifiers does Alen make?

Alen makes 2 types of air purifiers across their 4-model lineup: Large Room and Smart Wifi. Three of the 4 models fall into the Large Room category, while one model adds Smart Wifi connectivity for remote control and monitoring. All models carry the BreatheSmart name and cover a range of room sizes from 500 sq ft up to 2800 sq ft.

What room sizes do Alen air purifiers cover?

Alen air purifiers cover spaces ranging from 500 sq ft on the smaller end up to 2800 sq ft on the larger end, making the lineup suitable for bedrooms, home offices, living rooms, and larger open-plan areas. With 4 models at different coverage tiers, most buyers can find an Alen unit sized appropriately for their specific room without overpaying for excess capacity.

Are Alen air purifiers worth the price?

Alen air purifiers carry 5 certifications that speak to their quality and efficiency: Energy Star (meets EPA energy efficiency guidelines), ETL (electrical safety certified by Intertek), CARB (meets California's strict air quality standards), FCC (federal certification for electronic devices), and certified frustration-free packaging. The BreatheSmart lineup is built around HEPA filtration targeting allergens, dust, and mold, which are the core concerns for most air purifier buyers. For large-room coverage up to 2800 sq ft with that certification backing, Alen offers strong value for buyers prioritizing verified performance.

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What is the best Alen air purifier for large rooms?

Alen's largest coverage model handles spaces up to 2800 sq ft, making it the top pick for open living areas, large home offices, or combined spaces. All 4 Alen models share the BreatheSmart platform and HEPA filtration targeting allergens, dust, and mold, so the right choice mostly comes down to room size. Comparing current prices across all 4 models on this site can help identify which size tier fits your space and budget.

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Do Alen air purifiers have smart features?

One of Alen's 4 models includes Smart Wifi connectivity, allowing remote monitoring and control through a connected app. The remaining 3 models are in the Large Room category without wifi, focusing purely on filtration performance. The Smart Wifi model carries FCC certification, which is the federal requirement for wireless electronic devices, confirming it meets radio frequency standards.

Where can I buy Alen air purifiers?

Alen air purifiers are available on Amazon, where all 4 BreatheSmart models can be found with current pricing and customer reviews. You can compare prices across all Alen models on this site to find the best deal before purchasing.

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How do Alen air purifiers compare to other brands?

Alen stands out from many competitors by concentrating their entire 4-model lineup on large-room HEPA filtration, with coverage reaching up to 2800 sq ft. Many brands spread across many product types, while Alen's focused approach means their BreatheSmart models share a consistent feature set and certification stack including Energy Star, ETL, CARB, and FCC. Buyers who specifically need verified large-room performance will find Alen more directly suited to that need than brands with broader, less specialized catalogs.

The Bottom Line

Alen offers 4 BreatheSmart air purifiers across Large Room and Smart Wifi types, with coverage from 500 to 2,800 sq ft and 5 certifications including CARB, ETL, and Energy Star.

All models target allergens, dust, and mold, with select units adding carbon filtration for odor and smoke.

This brand is a strong fit for buyers who want certified, large-room performance and do not need a wide model range to choose from.

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