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 - High-End Air Purifiers

It offers significantly higher CADR smoke (1216 vs 99.2) and covers 1900 sq ft, far exceeding LG's 155 sq ft. Choose LG for smaller rooms where Wi-Fi control is a priority.

$464Buy on Amazon

Bottom Line: Alen BreatheSmart 45i is the better choice. It offers significantly higher CADR smoke (1216 vs 99.

Key Differences

The most significant spec differences at a glance

1,216

Cadr Smoke

1126% more

99.2

1,900

Coverage Sq Ft

1126% more

155

Advantages

Where each product wins

Alen

Cadr Smoke: 1126% higher (1216 vs 99.2)
Coverage Sq Ft: 1126% higher (1900 vs 155)

Who Should Buy Which?

Find the right product for your needs

Buy Alen if...

Alen Air Purifier BreatheSmart

This purifier is ideal for homeowners or renters with large living spaces, open-concept floor plans, or multiple rooms up to 1900 sq ft. If you prioritize rapid and extensive air purification for dust, allergens, VOCs, wildfire, or cigarette smoke (CADR smoke 1216), and value quiet operation for bedrooms, the Alen 45i is your choice. Its smart sensor automatically adjusts to maintain air quality, making it a powerful, set-and-forget solution for comprehensive home air cleaning, even with a slightly higher initial cost.

Buy LG if...

LG PuriCare AeroTower Air

The LG PuriCare AeroTower is perfect for individuals seeking a stylish, multi-functional unit for smaller, defined spaces like bedrooms, home offices, or small apartments (up to 155 sq ft). If you value modern aesthetics, smart home integration via Wi-Fi for remote control, precise air quality monitoring with a PM 1.0 sensor, and multiple airflow options, this is your pick. It offers effective general air filtration for everyday pollutants at a slightly lower price point, prioritizing design and smart features over raw purification power for vast areas.

Spec Comparison

6 specs compared

Specification	Alen Air Purifier BreatheSmart	LG PuriCare AeroTower Air
Price	$464	$450
Rating	4.4(60)	4.2(14)
Cadr Smoke	1216	99.2
Coverage Sq Ft	1900	155
Filter Type	HEPA	True HEPA
Model Number	45i_V2	—
Smart Sensor	Yes	Yes
WiFi	—	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

LG PuriCare AeroTower

Pros

99.97% particle capture for 0.3μm.
Three-layer filtration system cleans various pollutants.
PM 1.0 sensor monitors microscopic particles.
Cleans 155 sq ft rooms 4.8 times hourly.

Cons

744 sq ft coverage results in very slow air changes.
Requires periodic filter replacement, incurring cost.
Smoke CADR of 99.2 CFM limits rapid purification.

Frequently Asked Questions

Common questions about this comparison

Which air purifier is better for large rooms?

The Alen BreatheSmart 45i is vastly superior for large spaces, covering up to 1900 sq ft hourly. The LG PuriCare AeroTower is only effective for much smaller rooms, around 155 sq ft, making Alen the clear choice for expansive areas.

What's the main difference in smoke purification capability?

The Alen 45i has a Smoke CADR of 1216, indicating rapid smoke removal from large areas. The LG AeroTower has a CADR of 99.2, making it suitable only for very small rooms or lighter smoke conditions.

Is the price difference justified between the two?

Yes, despite a small price difference ($14), the Alen offers vastly superior performance, covering 1900 sq ft compared to LG's 155 sq ft, and a much higher CADR. Alen provides significantly more value for large-scale purification.

Which unit has better smart features?

Both have smart sensors. Alen auto-adjusts fan speed. LG adds Wi-Fi for remote operation and a PM 1.0 sensor for microscopic particle monitoring, offering more advanced connectivity and air quality insights.