Model vs model
Arno Square 4-in-1
vs Quooker Flex
The Arno Square 4-in-1 lists at £499, £796 less than the Quooker Flex at £1,295.
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.
The differences at a glance
- The Arno Square 4-in-1 lists at £499, £796 less than the Quooker Flex at £1,295.
- The Quooker Flex dispenses at 100°C; the Arno Square 4-in-1 tops out at 98°C.
- Declared idle draw is 10 W for the Quooker Flex against 11 W for the Arno Square 4-in-1, which compounds into the standby cost difference below.
- Tank capacity: 3 L on the Quooker Flex 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 filtered drinking water; the Quooker Flex does not.
- The Arno Square 4-in-1 dispenses chilled water; the Quooker Flex does not.
- The Quooker Flex ships with a 7-year warranty; the Arno Square 4-in-1 with a 3-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 | Quooker Flex |
|---|---|---|
| UK RRP | £499✓ | £1,295 |
| Boiling temperature | 98°C | 100°C✓ |
| Tank capacity | 2.4 L | 3 L |
| Idle power | 11 W | 10 W✓ |
| Peak power | 1500 W | 1600 W |
| Flow rate | - | - |
| Filtered water | Yes✓ | No |
| Sparkling water | No | No |
| Chilled water | Yes✓ | No |
| Filter type | 2-stage filter: PP cotton + activated carbon block | Active carbon filter inside the tank |
| Finishes | 4 | 6✓ |
| Warranty | 3 years | 7 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
Quooker Flex
- Idle draw
- 10 W
- Standby energy / year
- 88 kWh
- Standby cost / year
- £24
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
Quooker Flex
What we like
- Pull-out hose rinses sinks plus full 100°C boiling
- Same vacuum-insulated tank delivers true boiling water
- Magnetic dock returns hose neatly after use
- Boiling flow auto-locks when hose is detached from base
Watch out for
- £1,295 RRP matches Fusion despite extra moving parts
- Trustpilot owners report hose fraying within several years
- Hose replacement is a paid call-out, not 5-min DIY
- Requires 500mm depth + 200mm width clear undersink space