Name: Alen Air Purifier BreatheSmart 45i HEPA with Fresh Filter + Carbon for Large Rooms |1900 Sq. Ft| Perfect for Bedrooms - Captures Dust + VOCs & Wild...
Brand: Alen
SKU: B0FPD2J63T
Price: 464 USD
Availability: InStock
Rating: 4.4 (60 reviews)

Our Verdict

Alen BreatheSmart 45i Wins

Alen Air Purifier BreatheSmart 45i HEPA with Fresh Filter + Carbon for Large Rooms |1900 Sq. Ft| Perfect for Bedrooms - Captures Dust + VOCs & Wildfire & Cigarette Smoke

It offers significantly higher CADR smoke (1216 vs 248) and covers 1900 sq ft, far exceeding Coway's 387.5 sq ft. Choose Coway for smaller rooms and its washable pre-filter benefits.

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Spec Comparison

5 specs compared

Specification	Alen Air Purifier BreatheSmart	Coway Air Purifiers for
Price	$464	$317
Rating	4.4(60)	4.4(7.8k)
Cadr Smoke	1216	248
Coverage Sq Ft	1900	387.5
Filter Type	HEPA	True HEPA
Model Number	45i_V2	—
Smart Sensor	Yes	Yes

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Pros & Cons

Quick overview of strengths and weaknesses

Alen Air Purifier

Pros

Covers up to 1900 sq ft hourly
Captures particles down to 0.1 micron
Filters VOCs, odors, chemicals
Quiet operation promotes sleep

Cons

Limited absorption for heavy odors/chemicals
Requires periodic filter replacement

Coway Air Purifiers

Pros

Covers 387 sq ft for 5 air changes per hour.
Removes 99.999% of 0.01-micron particles.
Reduces 99% of volatile organic compounds.
Automatically adjusts fan speed to air quality.

Cons

Requires periodic replacement of internal filters.
Advertised coverage exceeds typical 5 ACH standard.

Frequently Asked Questions

Common questions about this comparison

Which air purifier is better suited for very large rooms?

The Alen BreatheSmart 45i excels in large spaces, covering up to 1900 sq ft. In contrast, the Coway 250 is designed for rooms up to 387.5 sq ft, making it more appropriate for standard bedrooms or medium-sized living areas.

How do their smoke removal capabilities compare?

The Alen BreatheSmart 45i offers vastly superior smoke removal, with a CADR smoke rating of 1216. The Coway 250 has a CADR smoke of 248. This indicates the Alen purifies smoke much faster and more effectively in its coverage area.

Is there a difference in filter maintenance costs?

The Coway 250 includes a washable pre-filter, potentially reducing long-term filter replacement costs. Both purifiers require periodic replacement of their main HEPA and carbon filters, though the Alen specifically filters VOCs, odors, and chemicals.

Do both models have smart sensor technology?

Yes, both the Alen BreatheSmart 45i and the Coway 250 are equipped with smart sensors. These sensors automatically detect air quality and adjust the fan speed accordingly to maintain optimal purification efficiently.