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
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2kW copper heating element – fast heat‑up and recovery, delivering responsive hot water performance for everyday use.
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15 litre diamond‑quality glass tank – glass‑enameled inner tank offers excellent corrosion resistance and long service life.
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Magnesium anode protection – sacrificial anode strengthens tank protection and can extend lifespan by up to 50% versus basic tanks.
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Modern cubic design – compact black and white enclosure for a clean, contemporary look under the sink.
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Unvented point‑of‑use heater – supplies mains‑pressure hot water without the need for a separate header tank.
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High‑density PU insulation – CFC‑free polyurethane foam minimises heat loss and keeps stored water hot for longer.
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Digital front control panel – easy‑to‑use display for temperature setting and mode selection (eco, vacation and boost).
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Eco mode (≈55°C) – optimised setpoint that balances comfort, efficiency and reduced limescale formation.
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Vacation mode (≈7°C) – frost‑protect/anti‑freeze mode that cuts energy use while protecting the tank when not in use.
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Boost mode – temporarily increases heating to quickly reheat the tank when hot water demand is high.
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ErP B hot water rating – low standing heat losses for its size, helping to reduce running costs.
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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
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Typical applications: kitchens, bathrooms, utility rooms, offices, shops, student accommodation, schools and small hospitality spaces needing local hot water.
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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).
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Energy consumption: standing loss around 0.58 kWh per 24 hours at standard test conditions.
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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
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Brand: Atlantic – Nanto Plus series.
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MPN: AH821553.
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Tank volume: 15 litres.
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Rated output: 2kW copper immersion heater.
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Electrical supply: 230V single‑phase, 50Hz.
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Installation position: under sink, wall‑mounted.
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Dimensions (H x W x D): approx. 378 x 360 x 321 mm.
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Weight (empty): about 8 kg.
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Heat‑up time to 50°C: ~27 minutes.
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Heat‑up time to 35°C: ~18 minutes.
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Standing loss / 24h: ~0.58 kWh.
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Energy label: ErP B for undersink model (A on equivalent over‑sink variants).
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Wiring location: bottom left connection point.
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Finish: black and white monochrome casing.
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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.
