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 Alen Air Purifier 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 - High-End Air Purifiers

It offers superior smoke CADR (1216 vs 416) and covers much larger rooms (1900 sq ft vs 650 sq ft). Choose Coway if you prioritize a 5-year warranty and a specific low noise level (22 dB).

$464Buy on Amazon

Bottom Line: Alen Alen Air Purifier BreatheSmart 45i is the better choice. It offers superior smoke CADR (1216 vs 416) and covers much larger rooms (1900 sq ft vs 650 sq ft).

Key Differences

The most significant spec differences at a glance

1,216

Cadr Smoke

192% more

416

1,900

Coverage Sq Ft

192% more

650

Advantages

Where each product wins

Alen

Cadr Smoke: 192% higher (1216 vs 416.0)
Coverage Sq Ft: 192% higher (1900 vs 650.0)

Who Should Buy Which?

Find the right product for your needs

Buy Alen if...

Alen Air Purifier BreatheSmart

The Alen BreatheSmart 45i is ideal for individuals or families living in large homes, apartments with open floor plans, or those needing robust purification in master bedrooms. If your priority is maximum coverage (1900 sq ft) and superior smoke/VOC removal (CADR_smoke 1216), this is your choice. It's perfect for mitigating wildfire smoke, general dust, and common odors efficiently and quietly, making it a powerful and more budget-friendly option for extensive air cleaning needs.

Buy Coway if...

COWAY Air Purifiers for

The Coway 400(G) is best suited for individuals with severe allergies, asthma, or heightened sensitivity to microscopic particles, as it removes 99.999% of particles down to 0.01 microns. If a quiet environment (22 dB min), energy efficiency (Energy Star), and a long 5-year warranty are crucial, Coway is a strong contender. It's well-suited for smaller large rooms up to 650 sq ft where ultra-fine particle filtration and peace of mind are paramount, despite its higher price point.

Spec Comparison

8 specs compared

Specification	Alen Air Purifier BreatheSmart	Coway Air Purifiers for
Price	$464	$649
Rating	4.4(60)	4.4(6.5k)
Cadr Smoke	1216	416
Coverage Sq Ft	1900	650
Noise Level db Min	—	22 dB
Filter Type	HEPA	True HEPA
Model Number	45i_V2	—
Smart Sensor	Yes	Yes
Weight	—	3.05 lbs
Energy Star	—	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

Removes 99.999% of 0.01-micron particles.
Covers 780 sq ft with 4 air changes per hour.
Smart Mode adjusts fan speed based on air quality.
Eco Mode shuts off fan when air is clean.

Cons

Stated 3,120 sq ft coverage misleading for 4 ACH.
True HEPA filters require periodic replacement.
No remote control listed in features.

Frequently Asked Questions

Common questions about this comparison

Which air purifier is better suited for very large rooms or open-plan areas?

The Alen BreatheSmart 45i excels in very large spaces, covering up to 1900 sq ft. The Coway Airmega 400(G) is designed for rooms up to 650 sq ft (for 4 air changes per hour), making it suitable for large rooms but not as extensive as Alen.

What is the main difference in their ability to remove smoke?

The Alen BreatheSmart 45i has a significantly higher smoke CADR of 1216, offering superior smoke removal for things like wildfire or cigarette smoke. The Coway Airmega 400(G) has a smoke CADR of 416.0, which is effective but less powerful for heavy smoke.

Which air purifier offers a quieter operation?

The Coway Airmega 400(G) specifies a minimum noise level of 22 dB, making it a quantifiable quiet option. While the Alen BreatheSmart 45i promotes quiet operation for sleep, a specific decibel measurement is not provided in its specifications.

Does either product offer a better warranty?

Yes, the Coway Airmega 400(G) stands out with a 5-year limited warranty, providing extended assurance. The warranty information for the Alen BreatheSmart 45i is not detailed in the provided specifications.