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