Model vs model
Franke Mythos Water Hub 5-in-1
vs Grohe Red Duo L-Size
The Grohe Red Duo L-Size lists at £1,625, £574 less than the Franke Mythos Water Hub 5-in-1 at £2,199.
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.
Franke
Franke Mythos Water Hub 5-in-1
The Mythos hub without the boiler: filtered, chilled and sparkling
Typical price: £2,199
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, £574 less than the Franke Mythos Water Hub 5-in-1 at £2,199.
- The Franke Mythos Water Hub 5-in-1 dispenses sparkling water; the Grohe Red Duo L-Size does not.
- The Franke Mythos Water Hub 5-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 5-in-1 | Grohe Red Duo L-Size |
|---|---|---|
| Typical price | £2,199 | £1,625✓ |
| Boiling temperature | - | 99°C |
| Tank capacity | - | 5.5 L |
| Idle power | - | - |
| Peak power | 230 W | 2100 W |
| Flow rate | - | - |
| 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 | 1 | 2✓ |
| Warranty | 2 years | 2 years |
| Released | - | - |
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
Franke Mythos Water Hub 5-in-1
No price-checked retailer offers for this model yet. Get a supply + installation quote instead →
Grohe Red Duo L-Size
- Amazon UKCheck price at retailerView ↗
Price checked on 27 Aug 2026.
Strengths and trade-offs
Franke Mythos Water Hub 5-in-1
What we like
- Sparkling, chilled and filtered water from one tap without paying for a boiling tank you would not use
- About £400 less than the 6-in-1 version of the same system
- Draws 5.5 W on standby against 33 W for the 6-in-1, because there is no tank to keep at 100°C
- 12-month filter interval with a built-in RFID replacement reminder
Watch out for
- No boiling water at all, so the kettle stays on the worktop
- Sparkling water is held as 0.6 litres and runs to 2.8 litres before it has to catch up
- Stainless steel only, where the 6-in-1 comes in five finishes
- Needs both a hot and a cold supply at the sink
- Two-year warranty on tap, tank and filter housing
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
Common questions
Franke Mythos Water Hub 5-in-1 vs Grohe Red Duo L-Size: frequently asked
- What is the difference between the Franke Mythos Water Hub 5-in-1 and the Grohe Red Duo L-Size?
- The Grohe Red Duo L-Size lists at £1,625, £574 less than the Franke Mythos Water Hub 5-in-1 at £2,199. The Franke Mythos Water Hub 5-in-1 dispenses sparkling water; the Grohe Red Duo L-Size does not. The Franke Mythos Water Hub 5-in-1 dispenses chilled water; the Grohe Red Duo L-Size does not.
- Which is cheaper, the Franke Mythos Water Hub 5-in-1 or the Grohe Red Duo L-Size?
- The Grohe Red Duo L-Size lists at £1,625, £574 less than the Franke Mythos Water Hub 5-in-1 at £2,199.
- Which is better for hard water, the Franke Mythos Water Hub 5-in-1 or the Grohe Red Duo L-Size?
- 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.