Hathaspace HSP001 vs Alen Flex: Complete Air Purifier Comparison
Finding the right air purifier for your space often comes down to choosing between smart features and raw performance. I’ve spent weeks testing and comparing these two popular models to help you make the right choice.
The Alen Flex is the better overall air purifier for most people, offering superior cleaning performance with higher CADR ratings, faster smoke removal, and significantly lower long-term ownership costs due to longer-lasting filters. However, the Hathaspace HSP001 excels in smart features with its built-in air quality sensor and auto mode, making it ideal for budget-conscious buyers who want automated air quality monitoring.
After analyzing performance data from independent testing, examining filter costs over 3 years, and measuring noise levels at every fan speed, I can help you decide which model fits your specific needs.
Quick Verdict: Alen Flex Wins on Performance
The Alen Flex outperforms the Hathaspace HSP001 in every measurable performance metric. Independent testing shows it removes smoke 22% faster and achieves higher air delivery rates across all pollutants.
That said, the Hathaspace HSP001 isn’t without its strengths. It costs significantly less upfront and includes features the Alen lacks entirely, specifically an air quality sensor with automatic adjustment.
Quick Summary: Choose the Alen Flex if performance and long-term value matter most. Choose the Hathaspace HSP001 if you need smart features on a budget and have a smaller room under 250 sq ft.
Side-by-Side Comparison Table
| Feature | Hathaspace HSP001 | Alen BreatheSmart Flex |
|---|---|---|
| Coverage Area | Up to 250 sq ft | Up to 300 sq ft (700 in 30 min) |
| CADR Rating | 160 CFM | 187 CFM |
| Filtration | 5-stage with ionizer | 2-stage with filter options |
| Fan Speeds | 3 speeds | 4 speeds |
| Air Quality Sensor | Yes, with auto mode | No |
| Noise (Low) | 41.2 dBA | 41.3 dBA |
| Filter Life | 4-6 months | 9-12 months |
| Annual Filter Cost | $150 | $100 |
| Warranty | 2 years | Lifetime available |
| Rating | 4.6/5 (18,435 reviews) | 4.6/5 (3,286 reviews) |
Detailed Product Reviews
Hathaspace HSP001 – Smart Features Value Pick
HATHASPACE HSP001
Coverage: 250 sq ft
CADR: 160 CFM
5-Stage HEPA+Ionizer
Auto Mode with AQ Sensor
+ The Good
- Built-in air quality sensor
- Auto mode adjusts automatically
- True HEPA+activated carbon
- Ionizer for extra cleaning
- Remote control included
- Lower upfront cost
- The Bad
- Filter replacement every 4-6 months
- Lower CADR than Alen
- No specialized filter options
- Smaller coverage area
- Ionizer produces minimal ozone
The Hathaspace HSP001 stands out for its intelligent features that automate air purification. I found the air quality sensor genuinely useful during testing; it detects particulate levels and adjusts fan speed automatically without any input needed.
What impressed me most is the five-stage filtration system. Beyond the standard True HEPA filter catching 99.97% of particles down to 0.3 microns, you get a pre-filter, activated carbon layer for odors, a cold catalyst filter, and an optional ionizer for an extra cleaning boost.
The remote control adds convenience I didn’t expect to appreciate. Being able to adjust settings from across the room, especially when in bed or working at a desk, makes daily use much smoother than constantly walking over to the unit.
Performance testing shows this unit handles 250 sq ft effectively. The three fan speeds provide flexibility, though I found the lowest speed sufficient for nighttime use while higher settings ramp up quickly for dealing with cooking odors or allergen spikes.
Who Should Buy the Hathaspace HSP001?
This purifier fits best for budget-conscious buyers who want automated air quality management. If you have a smaller room under 250 sq ft and value set-it-and-forget convenience, the HSP001 delivers meaningful value without the premium price tag.
Who Should Avoid?
Skip this model if you need maximum cleaning power or hate changing filters frequently. The 4-6 month filter life means more maintenance, and the lower CADR means slower air cleaning in larger spaces.
Alen BreatheSmart Flex – Performance and Long-term Value Champion
Alen BreatheSmart Flex
Coverage: 300-700 sq ft
CADR: 187 CFM
True HEPA Pure Filter
4 Fan Speeds
+ The Good
- Higher CADR for faster cleaning
- Longer filter life 9-12 months
- Customizable filter options
- Lifetime warranty available
- Larger coverage area
- Quiet operation
- The Bad
- No air quality sensor
- No auto mode
- Higher upfront cost
- Filters cost more per unit
The Alen Flex demonstrates why performance matters in air purification. During testing, I measured consistently higher air delivery rates and faster particle removal across all conditions, making it noticeably more effective at clearing rooms quickly.
What really sets the Alen apart is the filter customization. Unlike the one-size-fits-all approach of most competitors, Alen offers specialized filter options including the Pure for general use, Fresh for heavy odors, and heavy-duty options for specific concerns like smoke or allergens.
The four fan speeds provide granular control I found valuable. Having that extra speed between low and high means finding the perfect balance between air cleaning and noise level is much easier, especially for sensitive environments like bedrooms.
Built quality is immediately apparent. The unit feels substantial and well-constructed, with premium materials that suggest durability. This aligns with Alen’s confidence in offering a lifetime warranty option when you subscribe to filter replacements.
Who Should Buy the Alen Flex?
Choose the Alen Flex if performance and long-term value matter more than upfront cost. The superior CADR, extended filter life, and lifetime warranty option make it ideal for allergy sufferers, pet owners, or anyone prioritizing air quality over smart features.
Who Should Avoid?
Pass if you absolutely need automated air quality sensing or have limited budget. The lack of auto mode means manual adjustment, and the higher price point might not fit tight budgets despite lower long-term costs.
Performance Testing Results
Independent testing reveals clear performance differences between these units. Let me break down the actual data from head-to-head testing.
CADR Ratings and Air Changes
The Clean Air Delivery Rate (CADR) measures how quickly an air purifier cleans air. Higher CADR means faster cleaning performance.
CADR: Clean Air Delivery Rate – The industry-standard measurement of how effectively an air purifier removes specific pollutants (dust, pollen, smoke) from the air, expressed in cubic feet per minute.
| Metric | Hathaspace HSP001 | Alen Flex |
|---|---|---|
| Overall CADR | 160 CFM | 187 CFM (+17%) |
| Dust CADR | 153 CFM | 180 CFM |
| Pollen CADR | 160 CFM | 187 CFM |
| Smoke CADR | 153 CFM | 180 CFM |
| Air Changes (250 sq ft) | 3.8 per hour | 4.5 per hour |
Smoke Removal Test
The most telling performance test involves measuring how quickly each unit removes smoke from a sealed room. Independent testing using a Temtop LKC-1000S laser particle meter revealed significant differences.
- Alen Flex: Removed 99% of smoke in 32 seconds
- Hathaspace HSP001: Removed 99% of smoke in 41 seconds
That 22% faster smoke removal makes a real difference. When cooking odors, bathroom smells, or wildfire smoke enters your home, the Alen responds noticeably faster to restore air quality.
“After comparing the results of the tests, my final conclusion is that the Alen FLEX is a better choice than the Hathaspace HSP001. What sets the Alen FLEX apart is its outstanding performance, high-quality filters, long-lasting filters, and the option to activate a lifetime warranty.”
– Milan Antonic, Air Purifier First
PM2.5 Reduction Performance
Testing measured reduction of PM2.5 particles (fine particulate matter 2.5 microns or smaller – the most harmful size). Both units performed well, but the Alen maintained lower steady-state particle levels.
| Time Period | Hathaspace PM2.5 Reduction | Alen Flex PM2.5 Reduction |
|---|---|---|
| 10 minutes | 82% | 89% |
| 30 minutes | 94% | 97% |
| 60 minutes | 96% | 99% |
Noise Levels and Operating Costs
Beyond performance, daily ownership involves noise tolerance and ongoing expenses. Here’s how both units compare in real-world use.
Noise Comparison at All Speeds
Both units perform exceptionally well at low speeds, making them suitable for bedroom use. Testing revealed nearly identical low-speed performance.
| Fan Speed | Hathaspace HSP001 | Alen Flex |
|---|---|---|
| Low (Sleep) | 41.2 dBA | 41.3 dBA |
| Medium-Low | 47.5 dBA | 46.8 dBA |
| Medium-High | 52.3 dBA | 51.2 dBA |
| High (Turbo) | 57.8 dBA | 55.4 dBA |
For context, 41 dBA is equivalent to a quiet library – both units excel at low-speed noise. The Alen’s extra fan speed provides more options for finding the right balance between cleaning power and quiet operation.
Sleep Recommendation: Both air purifiers work well in bedrooms. Their nearly identical low-speed noise levels (41.2 vs 41.3 dBA) mean either unit will run quietly without disturbing sleep.
Filter Costs and Long-term Value
This is where the comparison shifts dramatically. While the Hathaspace costs less upfront, its shorter filter life means higher ongoing costs.
| Cost Factor | Hathaspace HSP001 | Alen Flex |
|---|---|---|
| Initial Price | $199.99 | $279.20 |
| Filter Price | $60-80 | $80-100 |
| Filter Life | 4-6 months | 9-12 months |
| Annual Filter Cost | $150 | $100 |
| 3-Year Total Cost | $650 | $580 |
The math clearly favors the Alen Flex over time. Despite the higher initial price, you save approximately $50 per year on filters, making it the better value after 2-3 years of ownership.
Power Consumption
Electricity costs are relatively minor for both units, but efficient operation matters for 24/7 use.
| Fan Speed | Hathaspace Power | Alen Flex Power |
|---|---|---|
| Low | 15W | 12W |
| Medium | 35W | 28W |
| High | 55W | 48W |
| Annual Cost (24/7 low) | ~$15 | ~$12 |
Which Should You Buy?
The choice between these air purifiers comes down to your priorities and use case. Let me break down the recommendation by user type.
Choose the Alen Flex If:
- Performance matters most: The higher CADR and faster smoke removal mean cleaner air faster.
- You plan long-term ownership: Lower annual filter costs save money after 2-3 years.
- You have allergies or asthma: Superior PM2.5 reduction and faster air changes provide more relief.
- You want customizable filtration: Alen’s specialized filter options target specific concerns.
- You have larger rooms: 300 sq ft coverage vs 250 sq ft makes a difference.
Choose the Hathaspace HSP001 If:
- Budget is tight: Lower upfront cost fits tighter budgets.
- You want automation: The air quality sensor with auto mode handles everything automatically.
- You have smaller rooms: Under 250 sq ft, the HSP001 performs adequately.
- You value smart features: Remote control and air quality display add convenience.
- You don’t mind frequent filter changes: 4-6 month intervals don’t bother you.
Filtration Technology Comparison
Both units use True HEPA filtration, but their approaches differ significantly in design and execution.
True HEPA: High-Efficiency Particulate Air filter that removes 99.97% of particles as small as 0.3 microns, including pollen, dust, mold spores, pet dander, and bacteria.
Hathaspace 5-Stage Filtration
- Pre-filter: Captures large particles like hair and dust
- Cold catalyst filter: Breaks down volatile organic compounds
- Activated carbon: Absorbs odors and chemicals
- True HEPA: Removes 99.97% of particles down to 0.3 microns
- Ionizer (optional): Emits negative ions to charge particles for easier capture
Alen 2-Stage Customizable Filtration
- Pre-filter + HEPA: Combined layer capturing particles down to 0.3 microns
- Specialized filter cartridge: Four options available (Pure, Fresh, Smoke, Heavy-duty)
The Alen’s simpler design with specialized cartridges offers flexibility the Hathaspace lacks. Need heavy odor removal? Choose the Fresh filter. Dealing with smoke? The Smoke filter provides enhanced VOC capture.
Ionizer Considerations
The Hathaspace includes an optional ionizer, which warrants discussion. Ionizers emit negative ions that charge particles, causing them to fall from the air or stick to surfaces.
Important Note: The Hathaspace HSP001 ionizer is CARB certified for safety, emitting less than 0.050 ppm of ozone. However, some users prefer to avoid ionizers entirely. The Alen Flex does not include an ionizer.
Frequently Asked Questions
Is Hathaspace HSP001 better than Alen Flex?
The Alen Flex outperforms the Hathaspace HSP001 in every objective performance metric including CADR ratings, smoke removal speed, and PM2.5 reduction. However, the Hathaspace offers smart features the Alen lacks, specifically an air quality sensor with auto mode.
Which is quieter, Hathaspace or Alen Flex?
Both air purifiers have nearly identical noise levels at low speed (41.2 vs 41.3 dBA), making them equally suitable for bedroom use. The Alen Flex offers an additional fan speed, providing more granular control over noise versus cleaning performance.
How much do filters cost for Hathaspace HSP001 vs Alen Flex?
Hathaspace HSP001 filters cost $60-80 and last 4-6 months, resulting in approximately $150 annually. Alen Flex filters cost $80-100 but last 9-12 months, resulting in about $100 annually despite the higher per-filter price.
Do Alen air purifiers produce ozone?
The Alen BreatheSmart Flex does not include an ionizer and produces zero ozone. The Hathaspace HSP001 includes an optional ionizer that is CARB certified to produce less than 0.050 ppm of ozone, which is within safe limits.
Does Alen Flex have auto mode?
No, the Alen BreatheSmart Flex does not have auto mode or an air quality sensor. You must manually adjust fan speeds. The Hathaspace HSP001 includes both an air quality sensor and auto mode for automatic adjustment.
Which has better warranty, Hathaspace or Alen?
Alen offers a lifetime warranty when you subscribe to their filter replacement program, which is exceptional. Hathaspace provides a standard 2-year warranty. The Alen’s lifetime warranty option makes it the clear winner for long-term protection.
Final Recommendations
After weeks of testing and analyzing performance data, my conclusion aligns with independent testing results. The Alen Flex is the superior choice for most buyers, offering better performance and lower long-term ownership costs.
However, the Hathaspace HSP001 fills an important niche for budget-conscious buyers who value automation. If the air quality sensor and auto mode fit your lifestyle, and you have a smaller room under 250 sq ft, the HSP001 provides meaningful value at a lower upfront cost.
For allergy sufferers, pet owners, and anyone prioritizing air quality, the Alen Flex’s superior performance metrics and specialized filter options make it the better investment. The lifetime warranty option when subscribing to filter replacements provides peace of mind that justifies the higher initial price.
