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.
For either tap. Free and no obligation.
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 |
Where to buy
Checked manually and dated; the retailer's page is always the live source. Affiliate links, disclosed as such. Commission never changes our comparisons. How affiliate links work here
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
InSinkErator 3N1 J-Shape
Common questions
Franke Omni vs InSinkErator 3N1 J-Shape: frequently asked
- What is the difference between the Franke Omni and the InSinkErator 3N1 J-Shape?
- 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.
- Which is cheaper, the Franke Omni or the InSinkErator 3N1 J-Shape?
- The InSinkErator 3N1 J-Shape lists at £899, £300 less than the Franke Omni at £1,199.
- Which is better for hard water, the Franke Omni or the InSinkErator 3N1 J-Shape?
- Both have built-in filtration, so both reduce scale in the tank. In a hard water area, plan to replace the cartridge closer to every 6 months rather than 12.