Wolf NK/NU/NU-1-20 oil/gas boiler, 17–20 kW

WOLF – premium German heating technology. The manufacturer from Mainburg produces boilers, controllers, and HVAC systems.

NK/NU/NU-1-20 – 17–20 kW oil/gas boiler body. Identified based on the original data plate, this standing unit is designed for conventional central heating, with an appropriate burner and control system.

• 17–20 kW heat output range: value from the data plate; the actual set output depends on the burner matching.
• 51 liters boiler water capacity: data for the specific version; the water capacity of another NK/NU unit is not applied to it.
• 3 bar permitted operating overpressure: the system pressure must be matched to this.
• 110 °C permitted supply temperature limit: does not mean that the boiler must be operated continuously at this temperature.
• Oil/gas boiler body: gas operation requires a suitable gas burner; the boiler body designation does not prove the presence of two types of burners.

Documentation: the WOLF 30 43 000 factory steel boiler manual found as series material; adaptation to the specific version and burner is required. The factory series manual is available online. The scope of delivery for the burner, controller, pumps, and hot water storage tank is defined in the specific quotation.

New comparison price: heizungsdiscount24.de, WOLF ComfortLine COB-2-20 B30, 8909299: 3,898.00 EUR gross, 19% German VAT; calculated net 3,275.63 EUR. Verification: 2026.10.06. Different, modern condensing oil boiler, not the exact new price of the offered type. The displayed base price applies to the boiler and oil burner; optional items such as the control module, connection kit, and flue gas routing must be clarified separately. Not the full installed boiler house price; delivery to Hungary must be agreed upon separately. Price source.

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