Model vs model
Franke Maris Water Hub 3-in-1 Electronic
vs Grohe Red Duo L-Size
The Franke Maris Water Hub 3-in-1 Electronic lists at £1,132, £493 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.
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Franke
Franke Maris Water Hub 3-in-1 Electronic
The Maris with an LED control ring, and the only Franke you can upgrade to 4-in-1 later
Typical price: £1,132
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 Franke Maris Water Hub 3-in-1 Electronic lists at £1,132, £493 less than the Grohe Red Duo L-Size at £1,625.
- The Franke Maris Water Hub 3-in-1 Electronic 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 Maris Water Hub 3-in-1 Electronic. 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 Maris Water Hub 3-in-1 Electronic 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 Maris Water Hub 3-in-1 Electronic | Grohe Red Duo L-Size |
|---|---|---|
| Typical price | £1,132✓ | £1,625 |
| Boiling temperature | 100°C✓ | 99°C |
| Tank capacity | 4 L | 5.5 L |
| Idle power | 14 W | - |
| Peak power | 1650 W | 2100 W |
| Flow rate | - | - |
| Filtered water | No | Yes✓ |
| Sparkling water | No | No |
| Chilled water | No | No |
| Filter type | Franke Pro M: five-stage, with ion-exchange resin and a 5 micron carbon block | BWT active carbon |
| Finishes | 7✓ | 2 |
| Warranty | 2 years | 2 years |
| Released | - | - |
Where to buy
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Franke Maris Water Hub 3-in-1 Electronic
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 Maris Water Hub 3-in-1 Electronic
What we like
- Can be upgraded to a 4-in-1 later with Franke's filtered water kit, which no other Franke boiling tap offers
- Timed dispense means you can walk away while a pan fills
- The widest finish range in the Franke boiling range, including copper and gold
- A genuine 100°C rather than the 98°C most rivals settle for
Watch out for
- No filtered cold water until you buy the upgrade kit, which is a separate purchase
- Two-year guarantee on tap, tank and filter housing, shorter than the Instante
- Around £140 more than the mechanical version for the same tank and the same filter
- The electronic control needs the tap to stay powered, where the mechanical one does not
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 Maris Water Hub 3-in-1 Electronic vs Grohe Red Duo L-Size: frequently asked
- What is the difference between the Franke Maris Water Hub 3-in-1 Electronic and the Grohe Red Duo L-Size?
- The Franke Maris Water Hub 3-in-1 Electronic lists at £1,132, £493 less than the Grohe Red Duo L-Size at £1,625. The Franke Maris Water Hub 3-in-1 Electronic 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 Maris Water Hub 3-in-1 Electronic. Bigger tanks serve more cups back to back; smaller tanks take less cupboard space.
- Which is cheaper, the Franke Maris Water Hub 3-in-1 Electronic or the Grohe Red Duo L-Size?
- The Franke Maris Water Hub 3-in-1 Electronic lists at £1,132, £493 less than the Grohe Red Duo L-Size at £1,625.
- Which is better for hard water, the Franke Maris Water Hub 3-in-1 Electronic or the Grohe Red Duo L-Size?
- The Grohe Red Duo L-Size has a built-in filter, the better choice in a hard water area: it reduces scale build-up in the tank and improves taste. The Franke Maris Water Hub 3-in-1 Electronic has no built-in filtration, so its tank will scale faster without a separate softener.