Model vs model
Arno Square 4-in-1
vs Qettle Signature Modern 4-in-1 (4L)
The Arno Square 4-in-1 lists at £499, £611 less than the Qettle Signature Modern 4-in-1 (4L) at £1,110.
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.
Qettle
Qettle Signature Modern 4-in-1 (4L)
Square-spout 100°C boiling tap in marine-grade stainless steel
UK RRP: £1,110
Full review →The differences at a glance
- The Arno Square 4-in-1 lists at £499, £611 less than the Qettle Signature Modern 4-in-1 (4L) at £1,110.
- The Qettle Signature Modern 4-in-1 (4L) dispenses at 100°C; the Arno Square 4-in-1 tops out at 98°C.
- Declared idle draw is 11 W for the Arno Square 4-in-1 against 14 W for the Qettle Signature Modern 4-in-1 (4L), which compounds into the standby cost difference below.
- Tank capacity: 4 L on the Qettle Signature Modern 4-in-1 (4L) versus 2.4 L on the Arno Square 4-in-1. Bigger tanks serve more cups back to back; smaller tanks take less cupboard space.
- The Arno Square 4-in-1 dispenses chilled water; the Qettle Signature Modern 4-in-1 (4L) does not.
- The Arno Square 4-in-1 ships with a 3-year warranty; the Qettle Signature Modern 4-in-1 (4L) with a 2-year warranty.
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 Modern 4-in-1 (4L) |
|---|---|---|
| UK RRP | £499✓ | £1,110 |
| Boiling temperature | 98°C | 100°C✓ |
| Tank capacity | 2.4 L | 4 L |
| Idle power | 11 W✓ | 14 W |
| Peak power | 1500 W | 1500 W |
| Flow rate | - | - |
| Filtered water | Yes | Yes |
| Sparkling water | No | No |
| Chilled water | Yes✓ | No |
| Filter type | 2-stage filter: PP cotton + activated carbon block | Q08 extruded carbon block cartridge |
| Finishes | 4 | 5✓ |
| Warranty | 3 years✓ | 2 years |
| Released | 2023 | 2021 |
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 Modern 4-in-1 (4L)
- Idle draw
- 14 W
- Standby energy / year
- 123 kWh
- Standby cost / year
- £33
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 Modern 4-in-1 (4L)
What we like
- 4-litre tank serves up to 8 cups in one go
- Marine-grade stainless steel tap, engineered in the UK
- Two-stage child safety: button and turn before boiling water flows
- Choice of round or square spout in stainless, PVD colour or etched finishes
Watch out for
- 17.5-minute initial heat-up and 10-minute recovery after a full tank
- Standard kit does not include a pressure reducing valve
- Two-year warranty