Name: Alen Air Purifier BreatheSmart 45i HEPA with Pure Filter for Large Rooms |1900 Sq. Ft.| Perfect for Bedrooms & Home Offices - Captures Dust + Pet D...
Brand: Alen
SKU: B0FPD3WFTG
Price: 449 USD
Availability: InStock
Rating: 4.7 (754 reviews)

Our Verdict

Alen BreatheSmart 45i Wins

Alen Air Purifier BreatheSmart 45i HEPA with Pure Filter for Large Rooms |1900 Sq. Ft.| Perfect for Bedrooms & Home Offices - Captures Dust + Pet Dander & Household Odors - White - High-End Air Purifiers

Its superior CADR (1216) and vast 1900 sq ft coverage are unmatched for large spaces. Choose Shark HC502 for its unique 3-in-1 purifier, heater, and fan functionality for smaller rooms (208 sq ft).

$449Buy on Amazon

Bottom Line: Alen BreatheSmart 45i is the better choice. Its superior CADR (1216) and vast 1900 sq ft coverage are unmatched for large spaces.

Key Differences

The most significant spec differences at a glance

1,216

Cadr Smoke

812% more

133.33

1,900

Coverage Sq Ft

812% more

208.33

Advantages

Where each product wins

Alen

Cadr Smoke: 812% higher (1216.0 vs 133.33)
Coverage Sq Ft: 812% higher (1900.0 vs 208.33)

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 homeowners or businesses with large, open-concept spaces or multiple rooms needing comprehensive air purification. If you prioritize exceptional air quality across up to 1900 sq ft, demanding high CADR (1216 for smoke) to combat dust, pet dander, and odors effectively, and appreciate quiet operation for sleep via pink noise, this is your premium choice. It's for those who invest in superior, dedicated air cleaning performance.

Buy Shark if...

Shark HC502 3-in-1 Clean

The Shark HC502 is perfect for individuals seeking a versatile, space-saving appliance for smaller rooms like bedrooms, home offices, or kitchens (up to 208 sq ft). If you value the convenience of combining an air purifier, heater, and fan into one unit to maintain comfortable temperatures alongside clean air, this 3-in-1 device is ideal. It suits those who prioritize multi-functionality and convenience in a compact package over maximum air purification coverage.

Spec Comparison

5 specs compared

Specification	Alen Air Purifier BreatheSmart	Shark HC502 3-in-1 Clean
Price	$449	$450
Rating	4.7(754)	4.3(678)
Cadr Smoke	1216	133.33
Coverage Sq Ft	1900	208.33
Filter Type	HEPA H13	Nanoseal HEPA
Smart Sensor	Yes	Yes
Model Number	—	HC502

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Pros & Cons

Quick overview of strengths and weaknesses

Alen Air Purifier

Pros

Covers up to 1900 sq ft hourly
Removes 99.9% of 0.1 micron particles
SmartSensor auto-adjusts fan speed
Operates quietly, emits pink noise for sleep

Cons

Requires ongoing purchase of replacement filters
Unit requires dedicated space due to large coverage
Operational noise level at max fan speed unknown

Shark HC502 3-in-1

Pros

Offers air purification, heating, and fan functions.
Exceeds HEPA standards; captures 99.98% of particles.
Auto-adjusts power based on PM1/2.5/10 air quality.
Heats rooms while simultaneously purifying air.

Cons

Covers only 208 sq ft for effective 5x hourly air changes.
Requires periodic replacement of specialized Nanoseal filter

Frequently Asked Questions

Common questions about this comparison

Which air purifier is better for large open-plan living areas?

The Alen BreatheSmart 45i is significantly better for large areas, covering up to 1900 sq ft hourly. In contrast, the Shark HC502 is designed for smaller spaces, with effective coverage of only 208 sq ft.

What's the main difference in air cleaning capacity for smoke particles?

The Alen BreatheSmart 45i has a much higher CADR for smoke particles at 1216.0. The Shark HC502's CADR for smoke is considerably lower at 133.33, indicating less powerful particle removal.

Is the Shark HC502's 3-in-1 feature a significant advantage?

Yes, if you need a multi-functional device for a small room. The Shark combines air purification, heating, and fan functions, saving space and providing year-round comfort. However, its air purification coverage is limited to 208 sq ft.

How do their HEPA filters compare?

The Alen uses a HEPA H13 filter, capturing 99.9% of 0.1 micron particles. The Shark features a Nanoseal HEPA filter, exceeding HEPA standards by capturing 99.98% of particles, but its overall cleaning capacity is lower due to smaller coverage.