Model vs model
Arno Square 4-in-1
vs Hanstrom Ume 3-in-1
The Arno Square 4-in-1 lists at £499, £300 less than the Hanstrom Ume 3-in-1 at £799.
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, £300 less than the Hanstrom Ume 3-in-1 at £799.
- The Arno Square 4-in-1 dispenses at 98°C; the Hanstrom Ume 3-in-1 tops out at 95°C.
- Declared idle draw is 9 W for the Hanstrom Ume 3-in-1 against 11 W for the Arno Square 4-in-1, which compounds into the standby cost difference below.
- The Arno Square 4-in-1 dispenses filtered drinking water; the Hanstrom Ume 3-in-1 does not.
- The Arno Square 4-in-1 dispenses chilled water; the Hanstrom Ume 3-in-1 does not.
- The Arno Square 4-in-1 ships with a 3-year warranty; the Hanstrom Ume 3-in-1 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 | Hanstrom Ume 3-in-1 |
|---|---|---|
| UK RRP | £499✓ | £799 |
| Boiling temperature | 98°C✓ | 95°C |
| Tank capacity | 2.4 L | 2.4 L |
| Idle power | 11 W | 9 W✓ |
| Peak power | 1500 W | 1200 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 | Hanstrom Carbon Pure water filter |
| Finishes | 4✓ | 3 |
| Warranty | 3 years✓ | 2 years |
| Released | 2023 | 2022 |
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
Hanstrom Ume 3-in-1
- Idle draw
- 9 W
- Standby energy / year
- 79 kWh
- Standby cost / year
- £21
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
Hanstrom Ume 3-in-1
What we like
- WRAS Approved confirms UK water-regulation compliance
- Touchscreen sets temperature from 75°C to 98°C
- 7 finishes including matt black and brushed gold
- Trustpilot praises responsive UK customer service team
Watch out for
- 95-98°C max never delivers genuine 100°C boiling
- Standard warranty only 1 year, shortest in this list
- Trustpilot reports boiler failures shortly after warranty
- 2.4L tank limits back-to-back dispensing to 7 cups