OSO Nano N RM5 Mini Undersink Water Heater - Compact Floor & Wall Mount 5L Point-of-Use Electric Hot Water Heater

The OSO Nano N RM5 is a compact 5 litre mini undersink water heater designed for quick and efficient point-of-use hot water supply. With a powerful 3 kW INCOTEC immersion heater, it heats water rapidly, delivering 5L of 40°C hot water in under 6 minutes—perfect for kitchens, hand wash basins, or small commercial sinks.

Key Features

• Compact and versatile design suitable for floor or wall mounting, ideal for tight spaces and under sink installation.
• High-performance 3 kW immersion heater heats water quickly for continuous use.
• Stainless steel construction with exceptional corrosion resistance for long-lasting durability.
• Class-leading insulation reduces heat loss, saving energy and costs.
• Simple electrical installation with factory-fitted wiring and safety thermostat adjustable between 40-70°C.
• Includes safety valve and mounting bracket with IP44 splash-proof rating for wet environments.
• Energy efficient A-rated efficiency ensures low running costs for homes and light commercial use.

Why Buy the OSO Nano N RM5?

This ultra-compact heater provides fast, reliable hot water at point of use with minimal footprint and simple installation. Ideal for locations where hot water demand is low but immediate ready supply is essential.

Its floor or wall mounting flexibility combined with robust construction and rapid heat-up capability makes it a top choice for residential and commercial applications.

Suitable For

• Under sink or basin installation in kitchens, bathrooms, offices, and light commercial environments.
• Point-of-use hot water needs at hand washbasins, utility sinks, or kitchenette facilities.
• Compact spaces needing a floor or wall-mounted solution with quick heating.

Technical Specifications

• Brand: OSO Hotwater
• Model: Nano N RM5
• Type: Undersink direct electric water heater
• Capacity: 5 litres
• Heating element: 3 kW INCOTEC immersion heater
• Heating time: Under 6 minutes to 40°C
• Voltage: 230V single phase
• Dimensions: 500 mm height x 234 mm depth x 200 mm width
• Weight: 12 kg
• Thermostat range: 40°C - 70°C adjustable
• Insulation: Class-leading for heat retention and energy saving
• Mounting: Floor or wall mount (bracket included)
• Ingress Protection: IP44 splash-proof
• Safety features: Thermostat cut-off, pressure relief valve provided
• Warranty: 10 years on stainless steel tank, 2 years on components

Installation & Compliance

Designed for simple, safe installation with included mounting bracket and G3 safety fittings. Suitable for use in residential and light commercial buildings with full compliance to UK building and electrical regulations.