NIBE F1345

NIBE AXC 50

The NIBE AXC accessory range enables installers to add specialist functions to a NIBE system beyond the standard capabilities of the heat pump or controller. Each module provides a structured set of relay outputs, sensor inputs and communication interfaces for managing shunt valves, external boilers, additional climate circuits, cooling functions, circulation pumps and hybrid heat sources. Supplied with temperature sensors and complete mounting materials, AXC modules integrate directly into the heat pump’s accessory bus and are automatically recognised during commissioning. AXC 50 is for pairing with the F1345/55 ground source ranges.

NIBE EMK 500

NIBE VST 20

The VST range provides the essential hydraulic function required to prioritise domestic hot water production in systems where the heat pump charges an external cylinder or accumulator. At the centre of each VST is a QN10 motorised diverter valve that shifts the heat pump’s charge flow between the space heating circuit and the hot water cylinder whenever the controller requests DHW. VST 20 is rated to up to 40kW output.

NIBE TSS 20 Base kit

The TSS 20 is a splitter module system used to connect one or more outdoor temperature sensors to multiple NIBE S-Series or F-Series heat pumps, ensuring that every connected unit receives the same accurate temperature reference. The base kit includes both an AXC module and a splitter module, enabling the connection of up to eight heat pumps or indoor units, while the extension kit provides additional splitter modules to scale systems up to a maximum of 32 products. Each AXC module can accept two outdoor sensors, providing automatic redundancy if one sensor fails, and all modules link together via a structured communication backbone that keeps wiring tidy and reliable.

NIBE TSS 20 Extension kit

The TSS 20 is a splitter module system used to connect one or more outdoor temperature sensors to multiple NIBE S-Series or F-Series heat pumps, ensuring that every connected unit receives the same accurate temperature reference. The base kit includes both an AXC module and a splitter module, enabling the connection of up to eight heat pumps or indoor units, while the extension kit provides additional splitter modules to scale systems up to a maximum of 32 products. Each AXC module can accept two outdoor sensors, providing automatic redundancy if one sensor fails, and all modules link together via a structured communication backbone that keeps wiring tidy and reliable.

NIBE HPAC 45

NIBE ELK 42

The NIBE ELK 42 acts as source of supplementary heat for NIBE heat pump systems, for up to 42kW of output. It integrates seamlessly with NIBE systems, allowing the heat pump to activate electric backup automatically during peak loads, cold weather or rapid reheat periods. Multi-stage output control ensures smooth modulation and avoids unnecessary electrical demand. It also incorporates built-in safety features, including thermostats, temperature limiters and circuit protection, making the range suitable for compliant, predictable and installer-friendly system design.

NIBE ELK 26

The NIBE ELK 26 acts as source of supplementary heat for NIBE heat pump systems, for up to 26kW output. It integrates seamlessly with NIBE systems, allowing the heat pump to activate electric backup automatically during peak loads, cold weather or rapid reheat periods. Multi-stage output control ensures smooth modulation and avoids unnecessary electrical demand. It also incorporates built-in safety features, including thermostats, temperature limiters and circuit protection, making the range suitable for compliant, predictable and installer-friendly system design.

NIBE VST 11

The VST range provides the essential hydraulic function required to prioritise domestic hot water production in systems where the heat pump charges an external cylinder or accumulator. At the centre of each VST is a QN10 motorised diverter valve that shifts the heat pump’s charge flow between the space heating circuit and the hot water cylinder whenever the controller requests DHW. VST 11 is rated to up to 18kW output.

NIBE ELK 5

NIBE ELK 213 EXP

ELK 15 is an immersion heater primarily intended for installation together with heat pump for heating houses or smaller apartment blocks. NIBE ELK 15 contains overheating protection and contactors to externally regulate the two power groups, 5.0 and 10.0 kW.

NIBE ELK 8

NIBE KB 32

The NIBE KB 32 provides a complete filling and flushing valve assembly for the brine side of a ground source heat pump installation. Designed to streamline commissioning, the units include clearly labelled valves for flow and return connections, enabling installers to fill or purge the collector loop efficiently before restoring the system to normal operating mode. KB 32 is sized for heat pumps up to 30 kW.

NIBE ELK 15

The NIBE ELK 15 acts as source of supplementary heat for NIBE heat pump systems, for up to 15kW of output. It integrates seamlessly with NIBE systems, allowing the heat pump to activate electric backup automatically during peak loads, cold weather or rapid reheat periods. Multi-stage output control ensures smooth modulation and avoids unnecessary electrical demand. It also incorporates built-in safety features, including thermostats, temperature limiters and circuit protection, making the range suitable for compliant, predictable and installer-friendly system design.

NIBE ACS 45

The NIBE ACS 45 is a dedicated passive and active cooling accessory designed to extend the functionality of NIBE heat pumps by enabling independent heating and cooling operation. Working as an intelligent interface between the heat pump and the wider cooling circuit, the ACS 45 provides structured connection points for shunt valves, reversing valves, circulation pumps and external temperature sensors. These inputs allow the heat pump to accurately regulate cooling demand via the chosen cooling curve, switch between passive and active cooling, and ensure safe system behaviour through features such as condensation prevention and external cooling mode blocking.

With direct compatibility across the NIBE S-Series, the ACS 45 gives installers a reliable and fully integrated way to deliver brine-fed or compressor-driven cooling within UK homes, using the same control logic, commissioning tools and installation practices already familiar from NIBE heating systems.

NIBE MODBUS 40

The NIBE Modbus 40 provides a robust, RS485-based Modbus RTU interface for integrating NIBE heat pumps with third-party building management systems. Housed in a compact DIN-rail enclosure with galvanic isolation on the communication electronics, it is engineered for safe installation within control panels and for dependable operation on shared RS485 networks. Commissioning is straightforward, with the heat pump automatically detecting the Modbus 40 via the accessories menu.

NIBE RTS 40

The RTS 40 is a wired room sensor designed to give NIBE heat pumps more precise control of indoor comfort by feeding back the room temperature. Electrical connection varies depending on the heat pump model, making the accessory compatible with a wide range of NIBE installations. Once connected, the RTS 40 is activated through the start-up guide, enabling installers to refine zonal temperatures.

NIBE HR 10

The NIBE HR10 is a compact auxiliary relay designed to provide safe and reliable switching of external 1 or 3 phase loads, such as immersion heaters, oil burners or circulation pumps, under the control of a NIBE heat pump or other automation source. The clear terminal layout makes electrical connection straightforward, with dedicated input and load terminals capable of handling up to 16 A resistive load and a protected X1 terminal block for the control signal. Cable glands are included for installation, and the compact dimensions make it easy to integrate the HR10 into tight plant spaces.

NIBE POOL 40

The NIBE POOL 40 accessory provides a complete, ready-engineered solution for integrating pool heating into a NIBE ground source heat pump system. Using its dedicated AXC module, motorised 3-way valve and paired pool sensors, the unit automatically diverts heating medium flow through a pool heat exchanger whenever pool heating is enabled. The accessory controls both the pool circulation pump and any required external heating medium pump, ensuring correct flow and accurate temperature readings throughout the charge cycle. Built-in sensor validation ensures pool heating only activates under safe conditions, providing dependable operation and seamless interaction with the wider heat-pump system.

NIBE RMU 40

The RMU 40 is a compact room unit that allows users to control and monitor their NIBE heat pump system from a convenient location elsewhere in the home, providing an intuitive interface and integrated room sensor equivalent to the BT50. Connection to the heat pump is made via the accessory communication bus, with clear wiring diagrams and commissioning steps provided in the manual, making setup straightforward even.

NIBE EME 20 UK

The NIBE EME 20 is a compact communication module that links NIBE heat pumps directly with compatible PV inverters, enabling the system to intelligently use surplus solar generation for heating, hot water and other energy-intensive functions. Capable of handling communication with up to twelve compatible inverters in parallel, the EME 20 is suitable for both standard domestic installations and larger PV systems.

NIBE ECS 40

The NIBE ECS 40 kit allows installers to add one or more additional heating circuits to a NIBE heat pump installation where different supply temperatures are required, such as radiator and underfloor heating combinations. Each kit includes a dedicated AXC accessory module, shunt valve, shunt motor, circulation pump and temperature sensor, enabling the new zone to run as a fully controlled climate system with independent flow temperature, heating curve and pump operation. The ECS 40 is intended for smaller underfloor heating circuits up to 80 m².

NIBE ECS 41

Extra heating circuit (maximum 80-250 m2 floor heating). ECS 41 is used when heat pump is installed in houses with up to four different climate systems that require different flow line temperatures, for example, in cases where the house has both a radiator system and an under floor heating system.