Brenda MillerHeat pump water heaters4 products
For maximum efficiency and long-term savings, the Nuos Plus S2 is the clear winner for larger households. If you have limited space or a smaller budget, the Lydos Hybrid series offers a reliable middle ground that still beats standard electric heaters.
Large families seeking max efficiency
Medium households needing space efficiency
Small families or couples
Singles or tight apartments
| Feature | Ariston Nuos Plus S2 | Ariston Lydos Hybrid 130L | Ariston Lydos Hybrid 100L | Ariston Lydos Hybrid 80L |
|---|---|---|---|---|
| Price | €1,041.98 | €599.00 | €549.00 | €509.00 |
| EfficiencyThe Nuos Plus S2 leads the pack with A+ efficiency, while the Lydos models offer solid but lower savings. | Class A+ (up to 80% savings) (winner) | Class A (up to 50% savings) | Class A (up to 50% savings) | Class A (up to 50% savings) |
| CapacityThe Nuos provides the largest capacity, making it the best choice for families. | 150 Liters (winner) | 130 Liters | 100 Liters | 80 Liters |
| MaintenanceAll models use the same electronic Protech anode system to save you the headache of frequent checks. | Dual anode, electronic Protech | Dual anode, electronic Protech | Dual anode, electronic Protech | Dual anode, electronic Protech |
Large families seeking max efficiency
This is the heavyweight champion for energy savings. It takes up more space but pays you back in lower electricity bills.
Medium households needing space efficiency
A practical hybrid unit that balances size and performance. It fits where the larger units might feel like they are taking over.
Small families or couples
The right size for a two-person household that wants modern tech without the bulk. It keeps the water hot without breaking the bank.
Singles or tight apartments
The smallest in the lineup, perfect for when square footage is at a premium. It still packs the punch of a hybrid system.
When you are looking at heat pump water heaters, you are essentially buying a machine that pulls heat out of thin air to save you money. The Nuos Plus S2 is the brute force of the group, designed for those who have the wall space and want the absolute best efficiency rating available. It is not a subtle appliance, but it is a hardworking one that will keep a family of four in hot showers without running up the meter.
On the other hand, the Lydos Hybrid range, whether you go for the 80L, 100L, or 130L, is built for the rest of us who do not live in a mansion. They use a smart I-Memory feature that learns your daily schedule. If you leave for work at 8 AM and come back at 6 PM, the heater stops wasting energy in the middle of the day. It is clever, simple, and frankly, it is the kind of common-sense engineering I can get behind.
The biggest differentiator here is capacity versus physical footprint. If you pick the 150L Nuos, you are committing to a larger installation project, but you are also getting the best energy performance. If you choose the Lydos 80L or 100L, you are prioritizing convenience and space. The maintenance is largely the same across the board thanks to the electronic Protech anodes, which means you can stop worrying about checking your tank every single year like the old days.
For a family of three or more, invest in the Ariston Nuos Plus S2. It is an investment that pays for itself through sheer efficiency. If you live alone or with a partner and space is tight, the Ariston Lydos Hybrid 100L is the sweet spot that offers enough hot water without needing a massive wall.
Don't overspend on capacity you don't need, but don't undersize your heater just to save a few euros, or you will be shivering through your morning shower.
Prices on amazon.es as of November 8, 2026. Prices may change.
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