THUNDER: The full inverter reversible heat pump from Clivet with R-290 natural refrigerant

Clivet presents THUNDER, the energy-efficient air-cooled reversible heat pump from 40 to 85 kW with R-290 natural refrigerant.

Frankfurt, 17th March 2025 - THUNDER is an innovative solution designed with full-inverter technology featuring the latest-generation scroll compressors and axial fans.

For a new building or a renovation, thanks to its ability to produce hot water at high temperature, it is the suitable solution as an alternative or replacement to traditional boilers, in combination with radiator systems. It offers maximum energy efficiency and, thanks to the use of the natural refrigerant (GWP = 0,02) R-290, that can be used in the long term as it fully complies with the European F-Gas regulation (517/2014), it contributes to the reduction of the direct and indirect greenhouse effect.

THUNDER is available in the 40 to 85 kW power range and is characterised by its high performance, application versatility and extended operating limits.

Top performance

The unit achieves outstanding performance for medium temperature applications: with a seasonal SCOP (W55) heating efficiency of up to 3.63, the unit far exceeds the minimum requirements of the Ecodesign (ErP) directive.

THUNDER provides heating, cooling and domestic hot water production up to 75°C and an operating range in heating of -20°C to +42°C outside air. Thanks to its careful design, the unit delivers a heating capacity very close to its nominal data, even at very cold outside air temperatures.

‘These results have been made possible thanks to the adoption of full-inverter technology that has been redesigned to use propane (R-290), a refrigerant with a very low GWP - explains Giuseppe Barreca, Clivet's product manager - Another innovative feature of THUNDER is the low noise level obtained (69 dB(A) of sound power in the super silenced version), which makes the unit the ideal solution for noise-sensitive installations such as city centres.

Maximum silence

THUNDER features 3 acoustic levels, with no change in the size of the unit:

● Acoustic configuration with compressor soundproofing (SC): basic version

● Silenced acoustic configuration (LN): -2 to -4 dB (A) less than the SC version

● Supersilenced acoustic configuration (EN): -6 to -10 dB (A) less than SC version

Safety

THUNDER is designed in full compliance with European safety standards, with additional safety measures such as the ATEX gas leakage sensor and extractor fan. All components are suitable for the use of R-290 refrigerant.

Modularity

THUNDER is designed for modularity, and dedicated hydraulic connections simplify and speed up the installation process. Up to 6 units can be hydraulically connected in parallel, and up to 16 units can be managed in a local network.

Modularity can also be configured across units of different capacities. The system obtained by combining several modules retains the strengths of the single module but multiplies its advantages: greater reliability, simplified handling and installation, quick and easy maintenance, scalability, and redundant operation.