New from Ariston, the Nimbus 5 R290 heat pump range has been developed to suit a variety of installation requirements, offering a choice of streamlined all-in-one systems, flexible configurations with a separate domestic hot water (DHW) cylinder, and compact solutions for installations where space is limited.
Delivering a coefficient of performance (COP) of up to 5.1, the range combines high efficiency with the sustainability benefits of natural R290 refrigerant. It comprises three outdoor unit sizes with five different outputs ranging from 3kW-15kW, alongside four indoor unit options. To make product selection simpler, indoor and outdoor units are now available as convenient pre-configured bundles.
Said by the company to have a footprint up to 40% smaller than many alternative solutions, these are suitable for space-constrained installations. When domestic hot water is required, the pre-plumbed cylinder option simplifies installation thanks to its factory-integrated pipework and connections, while built-in Wi-Fi, 4G and LAN connectivity ensures seamless control. The system can also manage up to two heating zones, delivering enhanced comfort and flexibility for homeowners. Slimline 150L and 180L cylinder options are also available where space is limited, alongside a standard 210L cylinder option.
Thanks to its cascade capability, Nimbus 5 adapts to projects of any size, from small single homes to complex, high-demand systems. Designed for reliable operation in ambient temperatures as low as -25°C, the range utilises the refrigerant properties of R290 to efficiently achieve water temperatures up to 75°C.
James Hodgson, National Training Manager at Ariston, commented: “Heating professionals are at the centre of the transition to heat pumps, so new products need to deliver more than efficiency alone. They need to be straightforward to specify, practical to install and backed by the training and technical support installers need.
“Our new Nimbus 5 R290 range has been developed with those requirements in mind. By expanding the choice available to installers and simplifying more of the installation and maintenance process, we want to make it easier for heating professionals to confidently offer heat pumps to more customers.”
Maintenance has also been simplified through the inclusion of an L-shaped access panel, providing improved access to both refrigerant and hydraulic components from the front and right-hand side of the outdoor unit, as well as grip recesses for easier transportation and SET+ for seamless commissioning and optimal parameter selection.
The outdoor units offer three noise reduction levels, supported by a dynamic grid movement system that reduces vibrations by evenly distributing stress throughout the structure. This increases stability, optimises airflow and helps minimise both operational noise and vibrations.
Every Nimbus 5 system includes the Sensys NET HD interface and remote management functionality through the Ariston NET app. The range is also equipped with the new Energy Manager 3.0 system. This enables seamless integration with boilers, photovoltaic (PV) systems, solar thermal installations, storage tanks and a wide variety of heat emitters.
The Nimbus 5 range is backed by warranties of up to 10 years and is A+++ Energy rated.
For further information visit Nimbus 5 Pocket R290 | Air Source Heat Pump | Ariston UK
*Energy savings may vary depending on system configuration, property characteristics and user behaviour.

