Model vs model
Franke Mythos Water Hub 6-in-1
vs Grohe Red Duo L-Size
The Grohe Red Duo L-Size lists at £1,625, £974 less than the Franke Mythos Water Hub 6-in-1 at £2,599.
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.
Franke
Franke Mythos Water Hub 6-in-1
Hot, cold, filtered, chilled, sparkling and boiling from one spout
Typical price: £2,599
Full review →
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 Grohe Red Duo L-Size lists at £1,625, £974 less than the Franke Mythos Water Hub 6-in-1 at £2,599.
- The Franke Mythos Water Hub 6-in-1 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 L on the Franke Mythos Water Hub 6-in-1. Bigger tanks serve more cups back to back; smaller tanks take less cupboard space.
- The Franke Mythos Water Hub 6-in-1 dispenses sparkling water; the Grohe Red Duo L-Size does not.
- The Franke Mythos Water Hub 6-in-1 dispenses chilled water; the Grohe Red Duo L-Size does not.
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 Mythos Water Hub 6-in-1 | Grohe Red Duo L-Size |
|---|---|---|
| Typical price | £2,599 | £1,625✓ |
| Boiling temperature | 100°C✓ | 99°C |
| Tank capacity | 4 L | 5.5 L |
| Idle power | 25 W | - |
| Peak power | 2200 W | 2100 W |
| Flow rate | 2 L/min | - |
| Filtered water | Yes | Yes |
| Sparkling water | Yes✓ | No |
| Chilled water | Yes✓ | No |
| Filter type | Pro M Connect: active carbon + ion-exchange resin | BWT active carbon |
| Finishes | 4✓ | 2 |
| Warranty | 2 years | 2 years |
| Released | 2022 | - |
Strengths and trade-offs
Franke Mythos Water Hub 6-in-1
What we like
- Six functions from one tap: boiling, chilled, ambient and sparkling plus hot and cold mains
- All-in-one under-sink unit houses boiler, chiller, CO2 bottle and filter
- 12-month filter interval with built-in RFID replacement reminder
- Pro M Connect filter adds ion-exchange limescale protection
Watch out for
- Sparkling capacity is 0.6 litres per fill, with a CO2 cylinder to replace
- Spout swivel is limited to 180 degrees
- Personalised settings need the Franke Home App
- Two-year warranty
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