Split heat pump
ROTEX HPSU Bi-Bloc Ultra

The heat pump split system with the environmentally friendly refrigerant R-32

HPSU Bi-Bloc uses the environmental heat with maximum efficiency. It consists of outdoor unit, indoor unit and heat storage unit. You do not need a separate technical room.

The Bi-Bloc Ultra 4-8 kW works with the sustainable refrigerant R-32. In conjunction with the new high-efficiency compressor, the best efficiency values are achieved. The new Bluevolution technology enables up to 40% higher DHW output.

With a flow temperature of up to 65 °C it is possible to use it flexibly in new buildings and even in modernisation.

System advantages

Commitment to the environment

Uses the environmentally friendly refrigerant R-32 for maximum performance and efficiency

Suitable for smallest properties

Whisper-quiet outdoor unit - in night mode only 35 dB(A) at 3 m distance

Innovative technology

Flow temperature up to 65 ° C also allow use in modernization

For the health of your family

Hot water preparation with hygienic fresh water technology (in combination with ROTEX HybridCube)

Product description

The split heat pump offers a versatile application

The heat pump split system with the environmentally friendly refrigerant R-32, consisting of outdoor unit, indoor unit and heat storage. Thanks to its modular design, the HPSU Bi-Bloc Ultra offers many different application options. For instance, the compact indoor units can be easily combined to form cascades for apartment buildings.

Control via smartphone

You can conveniently control your heating system from your smartphone using the Control app and LAN adaptor. The control unit is able to control the heat pump functions as well as monitor your system. This comprehensive system management option allows you to synchronise everything perfectly to your needs.  

Embrace efficiency and modern sustainability with the refrigerant of the future

Logo Kältemittel R-32

Everyone is a winner when environmentally friendly R-32 refrigerant is used. With its low GWP of 675, it is already playing an important part in reducing CO2 emissions, thereby keeping its environmental impact to a minimum. Due to this low GWP, all Bluevolution products already fulfil the requirements of new EU Regulation 517/2014, which stipulates that fluorinated greenhouse gases (also known as F-gases) be gradually replaced by 2030.

What GWP means

GWP (global warming potential) is a value indicating the global warming impact of a greenhouse gas. The lower the value, the lower the potential contribution to global warming.


Logo Inverter All ROTEX heat pumps employ inverter technology, which operates the compressor variably. This results in lower operating costs with increased system efficiency. An electronic control system ensures whisper-quiet operation of the outdoor units in night mode with only 35 dB(A) at a distance of 3 m.

Smart Grid Ready

The „Smart Grid Ready“ label certifies suitability for „power bias operation“. In order not to overload power grids, wind turbines are frequently shut down when more electricity is being generated than required. Storage is necessary to absorb these peaks in production. Heating systems with heat pumps can provide such storage. As and when required, they can convert excess electricity into thermal energy, which is then „stored“ in a buffer or domestic hot water tank. Grid operators can already shut down heat pump systems temporarily in the event of power shortages. So as to utilise their storage potential to the full, heat pumps require correspondingly smart control technology. Consumers can tell that a heat pump is suitably equipped by the „Smart Grid Ready“ label. In conjunction with the LAN adapter, the heat pump is SG Ready.


HPSU Bi-Bloc Ultra - the heat pump for new construction and modernization

Air-to-water heat pumps utilise the ambient air as their heat source. They can therefore be installed quickly and inexpensively. The amount of heating energy required by modern buildings is continually going down, resulting in lower flow temperatures. The low temperature heat pumps from ROTEX are designed specifically to meet such requirements. An underfloor heating system is essential for exploiting the full potential of this energy efficient heat generator. As underfloor heating systems have such a large surface area, they can make do with low surface temperatures. Many ROTEX heat pump systems can also apply the principle in reverse. Consequently, it is possible to use heat pumps in summer for cooling your building gently and economically.

When modernizing existing buildings, the same applies as with new buildings: with a ROTEX HPSU Bi-Bloc Ultra heat pump you can heat in winter with flow temperatures up to 65 °C, which also allows the use in older buildings. To use the full energy saving potential, the combination with underfloor heating is ideal. With the system ROTEX cut we offer a simple and fast way to retrofit a floor heating in old buildings.

Structure and funktion

The heat pump split system from ROTEX

The outdoor unit extracts the heat of the ambient air, which is absorbed by the heat transfer medium (refrigerant) and transferred to the indoor unit. The compact outdoor unit can be placed unobtrusively outside new buildings or existing residential buildings. 

The ROTEX HybridCube thermal store is a combination of hot water storage tank and continuous water heater. The domestic water to be heated is conveyed and heated through a separate high-performance heat exchanger made of stainless steel. Water that is charged first is also the first to be removed (first-in first-out principle).

Heating in winter - cooling in summer

The HPSU Bi-Bloc can not only heating but also cooling in combination with a floor heating system. Your comfortable climate every season.

Innovative heat storage concept - Hygienic, flexible and future-oriented

All ROTEX products with the  ECH2O label are characterized by a unique heat storage principle. Particularly space-saving, with the highest warm water comfort and open for additional heat sources. The innovative heat storage concept is applied to the HPSU Bi-Bloc when you combine the heat pump with a HybridCube thermal store.

Energy efficiency class

Energy efficiency label for heating systems - safe in the knowledge it‘s ROTEX

All ROTEX products are tested and meet the criteria of the Ecodesign Directive. For both individual products and packaged solutions, energy labels are a reliable indicator of the precise efficiency class. Perfectly matched in terms of their individual components, our complete systems provide both maximum convenience and the highest safety standards.

The combination with a thermal solar system is the most effective way to improve the efficiency class of the entire system.

ErP Label Bi-Bloc Ultra

Information about the energy efficiency labels

Special paint

Heat pump outdoor units in special paint

On request, we can deliver your heat pump outdoor unit in a RAL special color. Set individual color accents. We offer four special colors in addition to the standard finish.

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