Ariston Instant Electric Water Heater – 7.5 to 9 kW (Tankless, International Warranty)

The Ariston instant electric water heater in the 7.5 to 9 kW power range is built to deliver immediate hot water at a single outlet without requiring a storage tank. This high-capacity, point-of-use device is ideal for larger showers, heavy duty applications, or scenarios where faster temperature recovery and stronger flow are needed while still maintaining compact form.

Operating on a standard 220–240 V single-phase supply, this heater may employ dual or multi-stage heating (for example 3.3 + 4.5 kW) to adjust energy consumption according to inlet water temperature and user demand. With its elevated wattage, it can maintain consistent warmth even when water enters cold. It is typically configured to support pressures from 0.3 to 8 bar, and deliver maximum outlet temperatures near 55 °C under normal ambient conditions. The heating element—most likely made of high-grade copper—is protected by a waterproof casing rated IP25 or better to guard against splash or steam exposure when installed in wet zones.

Safety features are expected to include dual thermostats to prevent overheating, and may come equipped with a hand-shower kit or safety flow restrictor. The compact, wall-mounted layout allows installation close to the water outlet, reducing hot plumbing length and thermal losses. Use of a properly rated MCB + RCD breaker and suitably sized cable is essential when powering a high wattage device like 7.5–9 kW. Ariston’s global warranty network typically supports after-sales service and spare parts, provided local distributor conditions are met.

For optimal setup, allow a technician to verify your supply wiring, install protective devices, size cables correctly, and calibrate the flow to maintain stable temperature output. If your hot water demands include running multiple outlets simultaneously, consider sizing up or combining multiple units. When matched to your usage, a 7.5–9 kW model offers a balance of performance, responsiveness and installation flexibility—delivering warm showers with confidence, even during temperature extremes.

Specifications (Estimated)