NIBE ELK 15 Electric Boiler 5-10-15 kW

Secure your heating operations and optimize your climate setup during the coldest days of the year with the NIBE ELK 15. 

This high-performance and compact electric cassette is primarily engineered to function as an external backup or supplementary heat source (immersion heater backup) in residential homes and smaller commercial properties operating with a heat pump system. The design works essentially as an electric immersion heater mounted inside a sealed water jacket—a streamlined boiler unit without integrated domestic hot water storage.

Heavy-duty build and controlled power steps
The boiler is built from a robust, heavy-duty sheet steel casing and contains an internal water volume of 4.5 liters. Supplying a maximum output of 12 or 15 kW, it delivers a powerful and dependable energy boost when the heat pump's capacity falls short during extreme outdoor freezing conditions. The NIBE ELK 15 comes fully equipped with integrated contactors and a highly reliable thermal cut-out switch, allowing the output to be controlled externally across two individual power stages of 5 kW and 10 kW. A time-delay setup is recommended during wiring to prevent power surges.

Clean and space-saving installation
Thanks to its highly compact dimensions of 565x245 mm and standard hanging wall-mount design, the NIBE ELK 15 is exceptionally easy to position within boiler rooms, utility closets, or storage areas. It takes up minimal physical space and mounts directly onto flat walls. The electric cassette is supplied as a raw base unit without integrated components such as circulation pumps, expansion vessels, or pressure gauges, allowing the installer absolute freedom to customize the external pipework according to the property's layout.

Product Benefits:

• Powerful backup output: Supplies up to 15 kW of additional energy to assist heat pumps in peak winter.
• External step control: Integrated contactors allow external operation split into two power groups (5 and 10 kW).
• Compact wall-mount layout: Space-saving design that simplifies installation within tight utility rooms.
• High operational safety: Fitted with an integrated overheating cut-out sensor for absolute peace of mind.
• Heavy-duty materials: Water jacket manufactured from high-grade steel sheet rated up to 7 bar.
• System flexibility: Clean base configuration without internal pumps allows for bespoke system layouts.

Technical Specifications:

• Maximum output: 15 kW
• Voltage: 400V 3N~ (Three-phase configuration)
• Amperage: 25A
• Dimensions: 245 x 140 x 565 mm (W x D x H)
• Boiler water volume: 4.5 liters
• Maximum operating pressure: 7 bar
• Maximum control temperature: 68 °C
• IP Rating: IP44 (Splash-proof configuration)
• Connection size: G40
• Model/Design: Wall-mounted electric boiler without domestic hot water production
• EAN: 7331421322956

Please note that the manufacturer’s full warranty is not applicable for units bought in Sweden and installed outside Sweden.