Head-to-Head Comparison
Nilfisk ALTO Aero 21 vs Henry Hetty Comparison
Side-by-side technical specification matrix comparing the Nilfisk ALTO Aero 21 against the Henry Hetty. Compare tested suction power (kPa), decibel noise levels, dust capacity, HEPA filtration standards, and user satisfaction ratings.
Side-by-Side Specifications Matrix
| Specification | Nilfisk ALTO Aero 21 | Henry Hetty |
|---|---|---|
| Brand | Nilfisk | Henry |
| Model | ALTO Aero 21 | Hetty |
| Vacuum Type | Canister | Canister |
| Power Source | Corded | Corded |
| Bag / Bagless | Bagless | Bagless |
| Suction Pressure | - | - |
| Motor Power | 1000 W | 620 W |
| HEPA Filter | Yes (Sealed) | Yes (Sealed) |
| Dust Capacity | 21.5 L | 6 L |
| Noise Level | 64 dB | 72 dB |
| Weight | 16.5 lbs | 16.53 lbs |
| Star Rating | 4.4 / 5.0 | 4.8 / 5.0 |
Test Lab Verdict: Which Should You Choose?
Choose the Nilfisk ALTO Aero 21 if you prioritize higher suction metrics (- kPa) and specific floorhead tools for deep cleaning.
Choose the Henry Hetty if you prefer lighter handling (16.53 lbs) and quiet operating sound levels (72 dB).
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