Atlantic Nanto Plus 2kW 15L Under Sink Electric Water Heater (MPN: AH821553) is a premium unvented undersink hot water heater featuring a sleek black and white cubic design and advanced digital controls. With a 15 litre storage tank, 2kW copper immersion element and high‑density insulation, it provides a reliable, energy‑efficient source of hot water for kitchens, bathrooms, utility rooms and small commercial sinks where space is at a premium.

Key Features

• 2kW copper heating element – fast heat‑up and recovery, delivering responsive hot water performance for everyday use.
• 15 litre diamond‑quality glass tank – glass‑enameled inner tank offers excellent corrosion resistance and long service life.
• Magnesium anode protection – sacrificial anode strengthens tank protection and can extend lifespan by up to 50% versus basic tanks.
• Modern cubic design – compact black and white enclosure for a clean, contemporary look under the sink.
• Unvented point‑of‑use heater – supplies mains‑pressure hot water without the need for a separate header tank.
• High‑density PU insulation – CFC‑free polyurethane foam minimises heat loss and keeps stored water hot for longer.
• Digital front control panel – easy‑to‑use display for temperature setting and mode selection (eco, vacation and boost).
• Eco mode (≈55°C) – optimised setpoint that balances comfort, efficiency and reduced limescale formation.
• Vacation mode (≈7°C) – frost‑protect/anti‑freeze mode that cuts energy use while protecting the tank when not in use.
• Boost mode – temporarily increases heating to quickly reheat the tank when hot water demand is high.
• ErP B hot water rating – low standing heat losses for its size, helping to reduce running costs.
• Under‑sink or over‑sink flexibility – model is optimised for under‑sink use, with the same body dimensions as the over‑sink variant for versatile design.

Performance & Applications

• Typical applications: kitchens, bathrooms, utility rooms, offices, shops, student accommodation, schools and small hospitality spaces needing local hot water.
• Heat‑up times: approx. 27 minutes for a 50°C temperature rise and about 18 minutes for a 35°C rise (from cold feed to set temperature).
• Energy consumption: standing loss around 0.58 kWh per 24 hours at standard test conditions.
• Ideal where: there is no existing hot water distribution, or where long pipe runs from a central cylinder would cause delay and water wastage.

Technical Highlights

• Brand: Atlantic – Nanto Plus series.
• MPN: AH821553.
• Tank volume: 15 litres.
• Rated output: 2kW copper immersion heater.
• Electrical supply: 230V single‑phase, 50Hz.
• Installation position: under sink, wall‑mounted.
• Dimensions (H x W x D): approx. 378 x 360 x 321 mm.
• Weight (empty): about 8 kg.
• Heat‑up time to 50°C: ~27 minutes.
• Heat‑up time to 35°C: ~18 minutes.
• Standing loss / 24h: ~0.58 kWh.
• Energy label: ErP B for undersink model (A on equivalent over‑sink variants).
• Wiring location: bottom left connection point.
• Finish: black and white monochrome casing.
• Warranty: 2‑year manufacturer warranty (subject to terms and correct installation).

Installation Notes

• Must be installed by a competent person in accordance with local plumbing and electrical regulations and Atlantic’s installation manual.
• As an unvented undersink heater, it must be fitted with the specified safety kit (pressure relief, expansion control and any required check valves).
• Storage heaters ≤15L are G3‑exempt, but an expansion vessel may be required if minimum inlet pipe lengths cannot be met or where a PRV is installed on the cold feed.
• Mount securely under the sink on a suitable wall, with access for plumbing, wiring, digital control operation and future maintenance (including anode checks).
• Use eco, vacation and boost modes to tailor performance, reduce energy consumption and extend product life in areas with limescale.