NIBE ELK 26 Electric Boiler 26 kW
Compact 26 kW electric heater cassette for backup heating. Specifically optimized for docking with NIBE heat pumps in homes and small buildings.
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NIBE ELK 26 Electric Boiler 26 kW
The NIBE ELK 26 is a premium, Swedish-made wall-mounted electric heater cassette designed to serve as a high-capacity auxiliary or peak-load heat source in water-borne climate systems. Primarily engineered to operate alongside residential or small commercial-grade heat pumps, this compact electric boiler guarantees constant indoor temperatures and reliable heating operation during severe winter weather when additional system support is required.
In essence, the unit functions as an immersion heater installed inside a robust steel casing, containing no built-in domestic hot water facility or expansion tank. It is equipped with premium acid-resistant stainless steel heating elements, an integrated high-temperature limiter, and contactors to allow external automatic management. The boiler configuration divides the total 26 kW output into three controllable power stages (4 kW, 7 kW, and 15 kW). This smart modulating configuration balances the energy draw against the property's real-time demand, protecting the local grid from sudden electrical surges.
- Power Output: 26 kW (Stepped power groups: 4 kW, 7 kW, and 15 kW)
- Supply Voltage: 400 V (3-Phase, requires 40 A fusing)
- Application: Peak load heating / Docking to smart controllers (e.g., SMO 20 / SMO 40 / SMO S40)
- Boiler Water Volume: 4.5 liters
- Maximum Working Pressure: 7 bar
- Maximum Control Temperature: 68 °C
- Enclosure Rating: IP44
- Connection Interface: G40 (1 1/2" male thread)
- Dimensions: 245 mm (Width) x 140 mm (Depth) x 565 mm (Height)
- Weight: 15 kg (empty)
Please note that the manufacturer’s full warranty is not applicable for units bought in Sweden and installed outside Sweden.

