boilingwatertap.

Model vs model

Arno Square 4-in-1
vs Fohen Modena Digital 100

The Arno Square 4-in-1 lists at £499, £30 less than the Fohen Modena Digital 100 at £529.

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.

Arno Square 4-in-1 chrome instant boiling water tap with digital touch screen

Arnotap

Arno Square 4-in-1

Best-value 4-in-1 of 2026

Typical price: £499

Full review →
FM

Fohen

Fohen Modena Digital 100

Digital tap with a true 100°C boil

Typical price: £529

Full review →

The differences at a glance

  • The Arno Square 4-in-1 lists at £499, £30 less than the Fohen Modena Digital 100 at £529.
  • The Fohen Modena Digital 100 dispenses at 100°C; the Arno Square 4-in-1 tops out at 98°C.
  • Tank capacity: 2.5 L on the Fohen Modena Digital 100 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 ships with a 3-year warranty; the Fohen Modena Digital 100 with a 1-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.

Arno Square 4-in-1 vs Fohen Modena Digital 100 specifications from manufacturer datasheets
SpecArno Square 4-in-1Fohen Modena Digital 100
Typical price£499£529
Boiling temperature98°C100°C
Tank capacity2.4 L2.5 L
Idle power11 W-
Peak power1500 W2000 W
Flow rate--
Filtered waterYesYes
Sparkling waterNoNo
Chilled waterNoNo
Filter type2-stage filter: PP cotton + activated carbon blockcarbon and phosphate
Finishes44
Warranty3 years1 years
Released2023-

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

Fohen Modena Digital 100

What we like

  • Genuine 100°C dispense, rare in the Fohen range
  • 2 kW digital boiler with an eco mode to 60°C
  • Larger 2.5L tank than the Pro range
  • Published power and flow-rate figures

Watch out for

  • Only a 1-year standard warranty
  • A 3-in-1, fewer functions than the 4-in-1 Pro taps
  • Fohen notes the digital display is not very bright
  • Dispensed temperature can dip below 100°C