The NIBE S1256 is an intelligent, inverter-controlled ground source heat pump with a 180L integrated hot water cylinder. The NIBE S1256 has a seasonal performance factor (SCOP) of up to 6.22* and a new climate friendly refrigerant, meaning it is our most energy-efficient ground source heat pump to date. The inverter technology automatically adapts to your home’s heating, resulting in optimised savings and performance.
The heat pump is designed for houses up to approx. 400 m2 and is available in two output sizes: 1.5–8 kW and 3–13 kW. The NIBE S1256 is designed with low noise levels and is suitable for both new builds and when replacing an existing heat source.
The NIBE S1256 is part of the S-Series range. With its sophisticated design you can easily control your heating requirements with its integrated touchscreen and ability to connect to a range of smart home accessories. The NIBE S1256 can also be paired with myUplink, giving you full control over your heating and hot water from your phone or tablet.
HIGH CUSTOMIZATION
Our most energy-efficient ground source heat pump with a seasonal performance factor of up to 6.22.
TOP PERFORMING
A new, more climate friendly refrigerant, high hot water capacity and low noise level.
HIGH COMFORT
User-friendly touchscreen, wireless accessories, and integrated wireless connectivity with energy-saving smart technology for high comfort.
Wireless touchscreen controller
An exhaust air module that recovers heat from indoor ventilation air and transfers it to the brine circuit, boosting the efficiency of the connected ground source heat pump. It also provides mechanical ventilation, improving indoor air quality while helping reduce the size of the ground collector needed.Compatible with S-Series heat pumps.
Enable passive cooling by circulating cool brine (ground loop fluid) directly to the heating system, such as underfloor. PCM S40 is for S-Series heat pumps up to 8kW. Functionally the same as as the PCM 40, but aesthetically different to match the S-Series
Provides passive cooling by circulating cold fluid from the ground collector loop through a building’s cooling system.
Three phase back-up electric immersion heater - 42kW
An accessory that allows pool heating using heat pump. Max 18 kW. The heat pump controls the reversing valve, pool circulation pump and any heating circuit circulation pumps via POOL 40.
Three phase back-up electric immersion heater - 26kW
Three phase back-up electric immersion heater - 15kW
4-Pipe Passive/Active Cooling Accessory
The AXC 40 is an accessory card paired with NIBE domestic Ground Source Heat Pumps such as the SXX56 range, used to control and communicate with additional systems, such as extra climate systems, shunt-controlled additional heat, step-controlled additional heat, passive cooling, active cooling, etc.
Wireless temperature, humidity & CO₂ sensor to be paired with NIBE S-Series controllers
Wireless room thermostat
Filling and flushing kit used during the installation or maintenance of a ground source heat pump system. Allows filling or topping up of the brine circuit. For heat pumps up to 13kW.
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.
Communication module that translates Modbus RTU, from a solar inverter, to Modbus TCP/IP, for the heat pump to control the solar inverter
This wireless sensor allows you to read the temperature and humidity in a room or climate zone using the myUplink app. On the heat pump you can see the current room temperature or change it in °C. THS 10 replaces the fixed indoor sensor. Because it is battery powered, it is easy to install. Mount the sensor in your room and connect it to your NIBE S-Series heating installation.
A relay box accessory that acts as an interface between the heat pump and external devices, e.g. immersion heaters, cooling modules, external heat sources. It lets the heat pump turn other equipment on / off depending on the systems needs.
Allows the heat pump to control a second heating circuit (zone) with a different temperature requirement. For up to 80 m² of underfloor heating
Height (mm)
1800
Width (mm)
600
Depth (mm)
620
Net weight (kg)
231
Product efficiency class room heating, 35 °C
A+++
Product efficiency class room heating, 55 °C
A+++
System efficiency class room heating, 35 °C
A+++
System efficiency class room heating, 55 °C
A+++
Efficiency class water heating
A+
Volume water heater (l)
180
Refrigerant volume, CO² equivalent (ton)
0,54
Declared tap profile
XL
NIBE is proud to have received Quiet Mark certification for this heat pump, recognizing its exceptional low-noise performance. Quiet Mark is an internationally recognized certification awarded to products that meet rigorous standards for noise reduction, ensuring quieter and more comfortable living environments.
Learn more about our Quiet Mark certificationOur S-Series range is designed to be combined with our smart home accessories to create an efficient climate system for your home.
Our S-Series range is designed to be used with myUplink to create an efficient climate system for your home.
The NIBE ERS S10-400 is designed for installation with a NIBE ground or air source heat pump for a complete heating and ventilation system.