Model vs model
Franke Minerva
vs Grohe Red Duo L-Size
The Franke Minerva lists at £899, £726 less than the Grohe Red Duo L-Size at £1,625.
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.
Grohe
Grohe Red Duo L-Size
99°C filtered boiling water plus a full hot-and-cold mixer
Typical price: £1,625
Full review →The differences at a glance
- The Franke Minerva lists at £899, £726 less than the Grohe Red Duo L-Size at £1,625.
- The Franke Minerva dispenses at 100°C; the Grohe Red Duo L-Size tops out at 99°C.
- Tank capacity: 5.5 L on the Grohe Red Duo L-Size versus 4.7 L on the Franke Minerva. Bigger tanks serve more cups back to back; smaller tanks take less cupboard space.
- The Grohe Red Duo L-Size dispenses filtered drinking water; the Franke Minerva does not.
- The Franke Minerva ships with a 3-year warranty; the Grohe Red Duo L-Size 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 | Franke Minerva | Grohe Red Duo L-Size |
|---|---|---|
| Typical price | £899✓ | £1,625 |
| Boiling temperature | 100°C✓ | 99°C |
| Tank capacity | 4.7 L | 5.5 L |
| Idle power | 12 W | - |
| Peak power | 1500 W | 2100 W |
| Flow rate | - | - |
| Filtered water | No | Yes✓ |
| Sparkling water | No | No |
| Chilled water | No | No |
| Filter type | - | BWT active carbon |
| Finishes | 2 | 2 |
| Warranty | 3 years✓ | 2 years |
| Released | 2018 | - |
Strengths and trade-offs
Franke Minerva
What we like
- £899 RRP undercuts most 100°C branded competitors
- 4.7L tank capacity highest in the sub-£900 segment
- Genuine 100°C dispense matches premium models
- M-Box install system fits in under 30 minutes for a plumber
Watch out for
- Review Centre reports flow degradation within first year
- No built-in filter (scale build-up in hard-water areas)
- Customer support email-only, no engineer home visits
- Trustpilot mentions boiler failures near warranty expiry
Grohe Red Duo L-Size
What we like
- Boiling, filtered and a full hot-and-cold mixer in one tap, no second tap hole
- Large 5.5L boiling reserve (7L total) on the L-size boiler
- Child-safe touch-button dispensing with ChildLock as standard
- Sells around £1,625 at UK specialists, far below the £2,578 list price
Watch out for
- 99°C dispense, not a true 100°C boil (despite Grohe’s "100°C" marketing)
- At around £1,625 it is still a premium tap, though far below its £2,578 list
- BWT filter must be changed yearly or every ~600L, an ongoing cost
- Standard guarantee is 2 years (3 only with registration), shorter than InSinkErator or Franke