Model vs model
Franke Omni
vs InSinkErator 3N1 J-Shape
The InSinkErator 3N1 J-Shape lists at £899, £300 less than the Franke Omni at £1,199.
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.
InSinkErator
InSinkErator 3N1 J-Shape
Steaming hot, hot and cold from a slim J-shape spout
Typical price: £899
Full review →The differences at a glance
- The InSinkErator 3N1 J-Shape lists at £899, £300 less than the Franke Omni at £1,199.
- The Franke Omni dispenses at 100°C; the InSinkErator 3N1 J-Shape tops out at 98°C.
- Declared idle draw is 11 W for the InSinkErator 3N1 J-Shape against 12 W for the Franke Omni, which compounds into the standby cost difference below.
- Tank capacity: 4.2 L on the Franke Omni versus 2.5 L on the InSinkErator 3N1 J-Shape. Bigger tanks serve more cups back to back; smaller tanks take less cupboard space.
- The InSinkErator 3N1 J-Shape ships with a 5-year warranty; the Franke Omni 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 | Franke Omni | InSinkErator 3N1 J-Shape |
|---|---|---|
| Typical price | £1,199 | £899✓ |
| Boiling temperature | 100°C✓ | 98°C |
| Tank capacity | 4.2 L | 2.5 L |
| Idle power | 12 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 | Franke 08 filter cartridge | - |
| Finishes | 4✓ | 2 |
| Warranty | 3 years | 5 years✓ |
| Released | 2023 | 2020 |
Standby energy
What the idle draw adds up to over a year.
Franke Omni
- Idle draw
- 12 W
- Standby energy / year
- 105 kWh
- Standby cost / year
- £28
InSinkErator 3N1 J-Shape
- 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
Franke Omni
What we like
- True 100°C confirmed in Trusted Reviews testing
- Built-in filter delivers filtered cold water without add-on
- Spout body stays cool even during prolonged dispensing
- 4.2L tank larger than most rivals under £1,200
Watch out for
- Filter cartridges cost roughly £50 every 6 months
- Owners report flow slowdown after 2 years in hard-water areas
- Heating tank replacement reported at around £400 out of warranty
- Low mains pressure (under 1.5 bar) causes noticeable dribble