Model vs model
Arno Square 4-in-1
vs Qettle Signature
The Arno Square 4-in-1 lists at £499, £296 less than the Qettle Signature at £795.
Every number below comes from the manufacturers' own specification sheets. We highlight which tap leads on each spec; what matters most for your kitchen is your call.
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The differences at a glance
- The Arno Square 4-in-1 lists at £499, £296 less than the Qettle Signature at £795.
- The Qettle Signature dispenses at 100°C; the Arno Square 4-in-1 tops out at 98°C.
- Tank capacity: 2.4 L on the Arno Square 4-in-1 versus 2 L on the Qettle Signature. Bigger tanks serve more cups back to back; smaller tanks take less cupboard space.
- The Arno Square 4-in-1 ships with a 3-year warranty; the Qettle Signature with a 2-year warranty.
The two taps in a kitchen
Full specification, side by side
Sourced from manufacturer datasheets. A tick marks the better number on specs where more or less is objectively better.
| Spec | Arno Square 4-in-1 | Qettle Signature |
|---|---|---|
| Typical price | £499✓ | £795 |
| Boiling temperature | 98°C | 100°C✓ |
| Tank capacity | 2.4 L | 2 L |
| Idle power | 11 W | 11 W |
| Peak power | 1500 W | 1300 W |
| Flow rate | - | - |
| Filtered water | Yes | Yes |
| Sparkling water | No | No |
| Chilled water | No | No |
| Filter type | 2-stage filter: PP cotton + activated carbon block | Q08 extruded carbon block cartridge |
| Finishes | 4✓ | 3 |
| Warranty | 3 years✓ | 2 years |
| Released | 2023 | 2023 |
Standby energy
What the idle draw adds up to over a year.
Arno Square 4-in-1
- Idle draw
- 11 W
- Standby energy / year
- 96 kWh
- Standby cost / year
- £26
Qettle Signature
- Idle draw
- 11 W
- Standby energy / year
- 96 kWh
- Standby cost / year
- £26
Assumes the manufacturer's declared idle wattage around the clock at £0.27/kWh (UK average, mid-2026). Real usage adds the energy to heat the water you actually draw. Run your own numbers in the running cost calculator.
Strengths and trade-offs
Arno Square 4-in-1
What we like
- £499 RRP delivers 4-in-1 cheaper than most rivals
- 2-stage filtration removes chlorine and heavy metals
- 360° swivel spout handles pot-filling and rinsing
- Child-safe spring-loaded boiling dispense as standard
Watch out for
- 98°C ceiling not true 100°C boiling
- 2.4L tank yields only 7-8 cups before recovery
- Limited independent reviews outside Arno marketing
- Newer brand lacks long-term UK reliability track record
Qettle Signature
What we like
- Compact 2L tank fits tighter under-sink cabinets
- Hits 100°C boiling matching premium-brand temperatures
- £795 entry into Qettle's marine-grade Signature line
- Trustpilot reviewers cite responsive UK customer service
Watch out for
- 2L tank delivers only 4 mugs per fill in practice
- Some users note aggressive water release on dispense
- Handle can slip into filter mode accidentally
- Same 2-year warranty inherits Original reliability concerns