Compare Alen BreatheSmart 75i vs Honeywell HPA304

P1 Alen BreatheSmart 75i
P2 Honeywell HPA304

Comparison Takeaways

Alen BreatheSmart 75i

Where It Has the Edge

  • size and footprint is 4.5 vs 2.3. The main physical drawback is size: the 75i is large, bulky, and not easy to hide.
  • control placement is 4.1 vs 2.0. Controls are usually easy and accessible, but isolated failures produced serious frustration.
  • HEPA filtration is 4.5 vs 2.5. HEPA filtration is repeatedly described as effective or substantial.
  • build quality is 4.0 vs 2.1. Build quality is mostly positive in expert coverage and customer impressions.

Honeywell HPA304

Where It Has the Edge

  • listing accuracy is 5.0 vs 1.8. Customer evidence for listing accuracy is positive across the scored reviews.
  • indicator lights is 4.4 vs 1.8. Customer evidence for indicator lights is positive across the scored reviews.
  • pet dander removal is 4.7 vs 3.0. Customer evidence for pet dander removal is positive across the scored reviews.
  • dust removal is 4.7 vs 3.4. Dust removal is one of the clearest repeated positives.
Average score
Product 1: Alen BreatheSmart 75i
3.7
Product 2: Honeywell HPA304
3.7
activated carbon filter
Product 1: Alen BreatheSmart 75i
3.6

Carbon-filter evidence is positive for odor/VOC-focused filters but one customer complained about dusty carbon filters.

Product 2: Honeywell HPA304
No score yet
air changes per hour
Product 1: Alen BreatheSmart 75i
4.3

Opinionated evidence was found for this attribute in the listed reviews.

Product 2: Honeywell HPA304
No score yet
air circulation
Product 1: Alen BreatheSmart 75i
4.1

Air circulation is praised for strong movement and mixing, though one reviewer questioned full-room coverage for viruses.

Product 2: Honeywell HPA304
4.6

Customer evidence for air circulation is positive across the scored reviews.

air dryness
Product 1: Alen BreatheSmart 75i
No score yet
Product 2: Honeywell HPA304
2.5

One reviewer felt the purifier made the air drier and suggested pairing it with a humidifier.

air purification performance
Product 1: Alen BreatheSmart 75i
3.9

Most reviews report strong air-cleaning performance, though a minority of customers saw little benefit or defects.

Product 2: Honeywell HPA304
4.7

Air purification performance is a major strength across customer reviews.

air quality sensor accuracy
Product 1: Alen BreatheSmart 75i
3.6

Sensor feedback is often seen as quick and helpful, but humidity and mold complaints raise accuracy concerns.

Product 2: Honeywell HPA304
No score yet
allergen reduction
Product 1: Alen BreatheSmart 75i
3.8

Allergy/asthma relief is a strong customer theme, with many reports of easier breathing and better mornings.

Product 2: Honeywell HPA304
4.9

Allergen reduction is one of the strongest outcome themes.

app connectivity
Product 1: Alen BreatheSmart 75i
4.0

App control is useful for remote access and data, but feedback is mixed on discoverability, intuitiveness, and connection reliability.

Product 2: Honeywell HPA304
No score yet
auto mode performance
Product 1: Alen BreatheSmart 75i
3.7

Auto mode is commonly praised as set-and-forget, though some users found it too sensitive or aggressive.

Product 2: Honeywell HPA304
No score yet
build quality
Product 1: Alen BreatheSmart 75i
4.0

Build quality is mostly positive in expert coverage and customer impressions.

Product 2: Honeywell HPA304
2.1

Build quality is mixed to negative because several users report loose panels, broken plastic, or poor fit.

CADR rating
Product 1: Alen BreatheSmart 75i
4.1

Expert reviews cite strong CADR/CFM numbers that support the large-room use case.

Product 2: Honeywell HPA304
No score yet
child lock
Product 1: Alen BreatheSmart 75i
3.8

Child lock is praised in video walkthroughs as useful for preventing setting changes.

Product 2: Honeywell HPA304
No score yet
condition on arrival
Product 1: Alen BreatheSmart 75i
2.9

Arrival condition is mixed, with many fine deliveries but some wrong colors, missing parts, or damaged packaging.

Product 2: Honeywell HPA304
2.0

Condition on arrival is a recurring weakness because several units or filters arrived damaged.

control placement
Product 1: Alen BreatheSmart 75i
4.1

Controls are usually easy and accessible, but isolated failures produced serious frustration.

Product 2: Honeywell HPA304
2.0

Customer evidence for control placement is negative across the scored reviews.

customer support
Product 1: Alen BreatheSmart 75i
3.0

Customer support is mixed, ranging from fast helpful replacements to unanswered requests and difficult contact.

Product 2: Honeywell HPA304
3.6

Customer evidence for customer support is mixed across the scored reviews.

design and appearance
Product 1: Alen BreatheSmart 75i
4.4

Design is generally praised for sleek looks and color/panel options despite the unit’s bulk.

Product 2: Honeywell HPA304
3.3

Customer evidence for design and appearance is mixed across the scored reviews.

display readability
Product 1: Alen BreatheSmart 75i
3.7

Display readability/control lighting evidence is positive for visible air status and lights-off use.

Product 2: Honeywell HPA304
No score yet
documentation quality
Product 1: Alen BreatheSmart 75i
3.4

Documentation evidence is limited and mixed, especially around missing or insufficient manuals.

Product 2: Honeywell HPA304
3.5

Customer evidence for documentation quality is mixed across the scored reviews.

durability
Product 1: Alen BreatheSmart 75i
3.2

Durability evidence is positive among long-term users but offset by some failures.

Product 2: Honeywell HPA304
3.3

Customer evidence for durability is mixed across the scored reviews.

dust removal
Product 1: Alen BreatheSmart 75i
3.4

Dust reduction is often praised, but a few reviews report little visible dust improvement.

Product 2: Honeywell HPA304
4.7

Dust removal is one of the clearest repeated positives.

ease of use
Product 1: Alen BreatheSmart 75i
4.3

Setup and everyday operation are usually described as easy or simple, with limited exceptions.

Product 2: Honeywell HPA304
3.6

Customer evidence for ease of use is mixed across the scored reviews.

energy efficiency
Product 1: Alen BreatheSmart 75i
3.6

Energy use is generally described as low or reasonable for such a large purifier.

Product 2: Honeywell HPA304
2.5

Customer evidence for energy efficiency is negative across the scored reviews.

fan speed options
Product 1: Alen BreatheSmart 75i
3.8

Fan speed options are appreciated for quiet sleep settings and turbo cleaning.

Product 2: Honeywell HPA304
4.2

Customer evidence for fan speed options is positive across the scored reviews.

filter availability
Product 1: Alen BreatheSmart 75i
No score yet
Product 2: Honeywell HPA304
4.0

Customer evidence for filter availability is mixed across the scored reviews.

filter life
Product 1: Alen BreatheSmart 75i
3.0

Filter life is generally viewed positively at roughly 12-18 months, though replacement cost remains a concern.

Product 2: Honeywell HPA304
3.7

Customer evidence for filter life is mixed across the scored reviews.

filter replacement cost
Product 1: Alen BreatheSmart 75i
1.8

Filter replacement cost/subscription requirements are one of the recurring negatives.

Product 2: Honeywell HPA304
2.6

Customer evidence for filter replacement cost is negative across the scored reviews.

filter stages
Product 1: Alen BreatheSmart 75i
No score yet
Product 2: Honeywell HPA304
4.5

Customer evidence for filter stages is positive across the scored reviews.

handle design
Product 1: Alen BreatheSmart 75i
1.8

Handle and wheels help move the large unit, but wheel placement is not universally liked.

Product 2: Honeywell HPA304
No score yet
heating performance
Product 1: Alen BreatheSmart 75i
4.5

Opinionated evidence was found for this attribute in the listed reviews.

Product 2: Honeywell HPA304
No score yet
HEPA filtration
Product 1: Alen BreatheSmart 75i
4.5

HEPA filtration is repeatedly described as effective or substantial.

Product 2: Honeywell HPA304
2.5

Customer evidence for HEPA filtration is negative across the scored reviews.

indicator lights
Product 1: Alen BreatheSmart 75i
1.8

Indicator lights are valued for quick air-quality feedback and night-light control, with some false-reading complaints.

Product 2: Honeywell HPA304
4.4

Customer evidence for indicator lights is positive across the scored reviews.

listing accuracy
Product 1: Alen BreatheSmart 75i
1.8

Listing accuracy is mixed, with “as advertised” praise and a mold-removal complaint.

Product 2: Honeywell HPA304
5.0

Customer evidence for listing accuracy is positive across the scored reviews.

maintenance ease
Product 1: Alen BreatheSmart 75i
4.5

Maintenance is usually considered easy due to accessible panels, vacuumable pre-filters, and simple filter changes.

Product 2: Honeywell HPA304
4.4

Customer evidence for maintenance ease is positive across the scored reviews.

mold spore reduction
Product 1: Alen BreatheSmart 75i
No score yet
Product 2: Honeywell HPA304
4.5

Customer evidence for mold spore reduction is positive across the scored reviews.

noise level
Product 1: Alen BreatheSmart 75i
3.7

Low-speed noise is a major strength; high speeds can be more audible.

Product 2: Honeywell HPA304
3.5

Noise level is mixed, with quiet low settings and loud high or turbo settings.

odor reduction
Product 1: Alen BreatheSmart 75i
3.6

Odor evidence is mixed-positive: many note fresher air or cooking/smoke odor help, while some report plastic/filter smells.

Product 2: Honeywell HPA304
4.3

Odor reduction is usually positive, especially for pets, smoke, and cooking smells, with one weaker cooking-odor report.

overall satisfaction
Product 1: Alen BreatheSmart 75i
3.7

Overall satisfaction is mostly high, with negative outliers tied to defects, odor, price, or support.

Product 2: Honeywell HPA304
4.4

Overall satisfaction is generally high, though quality-control failures drive some very negative experiences.

particle removal effectiveness
Product 1: Alen BreatheSmart 75i
4.5

Particle removal is supported by expert tests and dust/particle customer reports.

Product 2: Honeywell HPA304
4.3

Customer evidence for particle removal effectiveness is positive across the scored reviews.

pet dander removal
Product 1: Alen BreatheSmart 75i
3.0

Pet dander and pet odor evidence is positive from pet-owner reviews and filter discussions.

Product 2: Honeywell HPA304
4.7

Customer evidence for pet dander removal is positive across the scored reviews.

pollen removal
Product 1: Alen BreatheSmart 75i
No score yet
Product 2: Honeywell HPA304
4.9

Customer evidence for pollen removal is positive across the scored reviews.

portability
Product 1: Alen BreatheSmart 75i
No score yet
Product 2: Honeywell HPA304
4.5

Customer evidence for portability is positive across the scored reviews.

pre-filter quality
Product 1: Alen BreatheSmart 75i
No score yet
Product 2: Honeywell HPA304
5.0

Customer evidence for pre-filter quality is positive across the scored reviews.

real-time air quality monitoring
Product 1: Alen BreatheSmart 75i
1.8

Real-time monitoring is a useful feature through lights, sensors, app readings, and graphs, though not always trusted.

Product 2: Honeywell HPA304
2.0

Customer evidence for real-time air quality monitoring is negative across the scored reviews.

reliability
Product 1: Alen BreatheSmart 75i
2.5

Reliability is mixed: some units ran for years, while others shut off, failed, or would not turn off.

Product 2: Honeywell HPA304
2.6

Customer evidence for reliability is negative across the scored reviews.

remote control
Product 1: Alen BreatheSmart 75i
No score yet
Product 2: Honeywell HPA304
2.0

Customer evidence for remote control is negative across the scored reviews.

replacement experience
Product 1: Alen BreatheSmart 75i
2.9

Replacement experience ranges from fast and hassle-free to defective or frustrating.

Product 2: Honeywell HPA304
3.6

Customer evidence for replacement experience is mixed across the scored reviews.

room coverage
Product 1: Alen BreatheSmart 75i
3.8

Large-room coverage is strongly supported across expert reviews and customer use in big rooms, offices, lofts, basements, and open plans.

Product 2: Honeywell HPA304
4.7

Customer evidence for room coverage is positive across the scored reviews.

room temperature mixing
Product 1: Alen BreatheSmart 75i
4.5

A customer noted room-temperature improvement from better air mixing.

Product 2: Honeywell HPA304
No score yet
safety certifications
Product 1: Alen BreatheSmart 75i
No score yet
Product 2: Honeywell HPA304
3.0

Customer evidence for safety certifications is mixed across the scored reviews.

scheduling options
Product 1: Alen BreatheSmart 75i
No score yet
Product 2: Honeywell HPA304
5.0

Customer evidence for scheduling options is positive across the scored reviews.

size and footprint
Product 1: Alen BreatheSmart 75i
4.5

The main physical drawback is size: the 75i is large, bulky, and not easy to hide.

Product 2: Honeywell HPA304
2.3

Customer evidence for size and footprint is negative across the scored reviews.

sleep mode
Product 1: Alen BreatheSmart 75i
4.2

Bedroom/sleep use is positive because of quiet low speeds and light shutoff.

Product 2: Honeywell HPA304
No score yet
sleep quality benefit
Product 1: Alen BreatheSmart 75i
4.0

Sleep quality benefits appear in multiple allergy/asthma customer reports.

Product 2: Honeywell HPA304
4.9

Several reviewers connected cleaner air or bedroom use with better sleep or sleeping more comfortably.

smart features
Product 1: Alen BreatheSmart 75i
No score yet
Product 2: Honeywell HPA304
3.3

Customer evidence for smart features is mixed across the scored reviews.

smoke removal
Product 1: Alen BreatheSmart 75i
No score yet
Product 2: Honeywell HPA304
4.9

Smoke removal is strongly supported in fire, cigarette, and wood-smoke situations.

true HEPA filter
Product 1: Alen BreatheSmart 75i
No score yet
Product 2: Honeywell HPA304
5.0

Customer evidence for true HEPA filter is positive across the scored reviews.

value for money
Product 1: Alen BreatheSmart 75i
3.2

Value is polarized because many find the performance worth it while others object to purchase and filter costs.

Product 2: Honeywell HPA304
4.0

Value for money is mixed between strong worth-it comments and complaints about price increases or filter costs.

virus reduction confidence
Product 1: Alen BreatheSmart 75i
No score yet
Product 2: Honeywell HPA304
2.0

One reviewer noted the unit was not guaranteed to eliminate viruses, limiting confidence for that use case.