At first glance, it is clear that the Hathaspace HSP001 and Alen FLEX are completely different air purifiers. The most significant difference between these two models is in the advanced options they offer. The Hathaspace has many advanced features, such as air quality sensors, auto mode, and more, while the Alen includes only the essential options, such as a timer and display off.
Among other features, I would highlight a 5-stage filtration technology on the Hathaspace HSP001 and a high-quality carbon filter on the Alen FLEX.
One common feature of these two models is their quiet operation. In fact, the Hathaspace HSP001 and Alen FLEX are among the quietest air purifiers we’ve tested so far, which is why I often recommend these devices for bedroom use.
Our Verdict
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.
The Hathaspace HSP001 is also a very good air purifier, but I don’t think it’s good enough to beat a device like the Alen FLEX.
If you have any questions about these two devices, please ask in the comments box below the article.
Specs: Hathaspace HSP001 Vs Alen FLEX
| Product Image |  |  21% off |
| Manufacturer | Hathaspace | Alen |
| Model | HSP001 | BreatheSmart FLEX |
| Dimensions (inches / cm) | 13.5 x 7x 19.5 inches (34.2 x 17.8 x 34.8 cm) | 8.5 x 15 x 25 inches (21,6 x 38,1 x 63,5 cm) |
| Weight (pounds / kg) | 12 lb (5.4 kg) | 15 lb (6.8 kg) |
| Clean Air Delivery Rate (CADR) | 160 CFM (270 m³/h) | 187 CFM (317 m³/h) |
| Coverage (4.8 ACH)
Room Coverage Explanation: ACH is a measurement used in indoor air quality management to indicate how many times the air within a defined space is changed/moved through the filter media.
For more details, visit our ACH calculator tool. | 250 sq. ft. (23 m²) | 300 sq. ft. (28 m²) |
| Performance Ratings Performance Ratings Score Summary: 8.3 - Average Score (83 products) 9.8 - Best Score (2 products) 1 - Worst Score (1 products) We use the Temtop LKC-1000S laser particle meter to test the particle removal efficiency of every air purifier. It measures PM2.5 (µg/m3), PM10 (µg/m3), Particles (per/L), and HCHO (mg/m3) in the air, and also calculates the AQI. You can read more about our testing methodology here. | ||
| Filtration Technology | Cold Catalyst Filter, Cellular-Activated Carbon, Antibacterial, True HEPA Filter, and Ionizer | Pre-filter, True HEPA Filter, and Activated Carbon Filter |
| Filter Replacement Indicator | No | Yes |
| Filter Life | 4-6 months | 9-12 months |
| Power Consumption
Power Usage Summary: Our extensive testing of 83 air purifiers revealed the following power consumption insights:
Check out our power consumption calculator tool. | 45W | 50W |
| Operating Costs Ratings Operating Costs Ratings Score Summary: 9 - Average Score (83 products) 10 - Best Score (2 products) 1.7 - Worst Score (1 products) We measure the power usage at all speeds using an energy meter, after which we calculate how much it would cost to use the device at a particular fan speed for one month. For reference, we use an energy price of $0.12 per kWh. You can read more about our testing methodology here. | ||
| Number of Fan Speeds | 3 – Speed 1, Speed 2, and Speed 3 | 4 – Speed 1, Speed 2, Speed 3, and Turbo Mode |
| Air Quality Sensor Air Quality Sensor Summary: Out of 83 air purifiers tested, only 41 have the air quality sensor. | Yes | No |
| Air Quality Indicator | Yes | No |
| Auto Mode Auto Mode Summary: Out of 83 air purifiers tested, only 42 have auto mode functionality. | Yes | No |
| Smart App Smart App Summary: Out of 83 air purifiers tested, only 26 have smart app functionality. | No | No |
| Voice Control Voice Control Summary: Out of 83 air purifiers tested, only 25 have voice control functionality. | No | No |
| Other Features | Display LightRemoteTimerIonizer | Control Panel LockTimer |
| Noise Level (low – high) | 41.3 – 49.3 dBA | 41.2 – 53.7 dBA |
| Noise Ratings Noise Ratings Score Summary: 9.3 - Average Score (83 products) 10 - Best Score (1 products) 8.2 - Worst Score (1 products) We use a special noise measurement tool to test the noise level of the air purifier at all speeds. We measured the noise level on the dBA scale. You can read more about our testing methodology here. | ||
| Best Suited For | Living Rooms Bedrooms Dust Quiet Operation | Living Rooms Bedrooms Kitchens Allergies Neutralizing VOCs Dust Mold Quiet Operation |
| Warranty | 2-5 year | 1-year to Lifetime |
| In-Depth Review | Hathaspace HSP001 | Alen BreatheSmart FLEX |
| Price |
Particle Removal Test – Comparison
Regarding the performance tests, the first thing we do is determine the room coverage of an air purifier. In this case, the coverage is almost identical, but we tested these air purifiers in completely different rooms.
The reason is that we believed the Alen FLEX was capable of improving air quality in much larger rooms, while the Hathaspace HSP001 was better suited for smaller ones.
Particle Removal Tests - Comparison
We placed the Hathaspace HSP001 and Alen FLEX in a few different tests and measured their performance using the Temtop laser particle meter.
We performed four different performance tests, which you can see in the chart below. What is evident here is that both air purifiers produced outstanding results in all the tests.
However, the Alen FLEX performed better overall in our tests; it reduced PM2.5 with ease and also proved to be excellent at neutralizing bad odors, which isn’t the case with the Hathaspace HSP001.
Smoke Box Test – Comparison
We placed the Hathaspace HSP001 and the Alen FLEX in our unique smoke test, where we fill a glass box with smoke and then measure how fast each air purifier removes all the smoke.
In this test, the Alen FLEX showed superior performance, removing all the smoke in just 32 seconds, which is about 9 seconds faster than the Hathaspace HSP001.
Not only did the Alen FLEX achieve a better result in this test, but it also showed much better performance in our real-life testing of odor neutralization, which I believe is due to its superior carbon filter.
Noise Level Test – Comparison
I usually look for a sleep mode in an air purifier, as it is typically a confirmation that the device is very quiet and suitable for bedroom use.
However, even though these two air purifiers don’t have a sleep mode, they produce very low noise at the lowest speeds, and I would definitely recommend both for bedroom use.
Noise Levels - Comparison
Comparison of noise levels at all fan speeds between the Hathaspace HSP001 and Alen FLEX air purifiers.
The Hathaspace HSP001 has three fan speeds, while the Alen FLEX has four.
At the lowest speed, the Hathaspace produces a sound of 41.3 dBA, while the Alen FLEX produces a sound of 41.2 dBA. On the other hand, the Alen FLEX is much louder at its maximum speed, with a noise level of 53.7 dBA, while the Hathaspace produces a sound of 49.3 dBA at its maximum speed.
| Fan Speed | Alen FLEX (dBA) | Hathaspace HSP001 (dBA) |
|---|---|---|
| Speed 1 (Low) | 41.2 dBA | 41.3 dBA |
| Speed 2 (Medium) | 43.5 dBA | 43.9 dBA |
| Speed 3 (High) | 48.9 dBA | 49.3 dBA |
| Speed 4 (Turbo) | 53.7 dBA | - |
However, everyone should keep in mind that the Alen FLEX has a higher CADR and one more fan speed, which is why I consider it a quieter air purifier overall compared to the Hathaspace HSP001.
Operating Costs – Comparison
Initially, the Alen FLEX used a slightly more powerful motor of 50W, while the Hathaspace HSP001 used a 45W motor.
However, after testing their power usage at all speeds, we noticed that the Alen FLEX, despite having a more powerful motor, uses less power than the Hathaspace HSP001.
For example, if you left these two air purifiers running at their maximum speeds, 24 hours daily, for one month, your electrical bill would increase by about $2.13 for the Alen FLEX and by about $3.01 for the Hathaspace HSP001.
Monthly Power Consumption Cost Comparison
Comparison of monthly power consumption costs for the Hathaspace HSP001 and Alen FLEX air purifiers at all fan speeds.
Refer to the chart above or the table below for the power usage and costs at all speeds.
Besides electric power costs, there is also the cost of replacement filters. The first thing we can notice here is that the Alen FLEX uses a much more durable filter, but it is also slightly more expensive than the Hathaspace’s.
| Fan Speed | Alen FLEX (W + $/month) | Hathaspace HSP001 (W + $/month) |
|---|---|---|
| Standby | 0.4W ($0.04) | 1.4W ($0.12) |
| Speed 1 (Low) | 2.7W ($0.24) | 20.3W ($1.78) |
| Speed 2 (Medium) | 6W ($0.53) | 26.5W ($2.32) |
| Speed 3 (High) | 14.2W ($1.24) | 34.8W ($3.05) |
| Speed 4 (Turbo) | 24.3W ($2.13) | - |
Overall, the lower power usage at all speeds and the longer-lasting filter are more than enough reasons to declare the Alen FLEX as more affordable to maintain than the Hathaspace HSP001.
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