Refra R290 WTW heat pumps and chillers
19th March 2026
LITHUANIA: Refra has introduced Oasis, a new series of R290 commercial and industrial water-to-water chillers and heat pumps.
Built on a unified platform concept, the range includes water-to-water heat pumps and liquid-cooled chillers that share the same construction, refrigeration technology and compact design.
Cooling capacities reach up to 410kW, while heating capacities extend up to 516kW.
The units follow the Class IV – ventilated enclosure concept defined in EN378, where all refrigerant-containing components are located inside a dedicated enclosure equipped with monitored ventilation and a refrigerant leak detector. The enclosure is maintained under slight negative pressure to prevent refrigerant from escaping into the surrounding environment. If a leak is detected, the system automatically shuts down all non-ATEX components while the ventilation extracts the gas from the enclosure.
To meet different requirements, the Oasis range is available in several configurations. These include Oasis Solo unit for small to medium installations, as well as multi-circuit models Oasis Twin, Oasis Tribus and Oasis Quad, designed for higher capacities and mission-critical environments where operational redundancy and continuous performance are essential.
Advanced control and efficiency options, include inverter technology for variable compressor speed control.
Oasis units are typically supplied as either water-to-water chillers for cooling or water-to-water heat pumps for heating, depending on project requirements. In a dual-function configuration, however, the unit can provide both heating and cooling capacities within the same system.
In this setup, the unit simultaneously generates heating and cooling power, while the Siemens Climatix controller allows the user to define which output is prioritised based on operational needs.
