Refra Launches Water to Water Heat Pump and Chiller Line
Refra introduces OASIS, a versatile hydronic line of water-to-water chillers and heat pumps for efficient heating and cooling in commercial and industrial buildings.
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Oasis Quad from the new Refra water to water product line © Ilona Brant Pavšukova
The new product line operates with natural refrigerant propane (R290), delivering strong thermodynamic performance while maintaining a very low global warming potential. The systems fully comply with EU F-Gas regulations and EN378 safety standards, supporting the transition towards more sustainable refrigeration and air conditioning solutions.
Safety is a key element in the design of the Oasis line. 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. This integrated safety concept allows Oasis systems to safely utilize natural refrigerants such as propane while meeting strict safety requirements for installation in commercial and industrial buildings.
Engineered for Performance and Reliability
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.
The OASIS series also offer advanced control and efficiency options, including inverter technology for variable compressor speed control. This enables precise capacity modulation, improved part-load efficiency and reduced mechanical stress on system components.
Refra Oasis water to water heat pumps and chillers © Brigita Luščinskaitė
Heating and Cooling in One System
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 prioritized based on operational needs. This approach enables efficient use of thermal energy, particularly in buildings where heating and cooling demands occur at the same time.
By integrating both functions into a single unit, the solution reduces equipment footprint, simplifies system design, and lowers installation and investment costs compared to separate heating and cooling systems.
Faster Selection, Shorter Lead Times
OASIS expands Refra’s Standard Line portfolio, developed to simplify product selection and ensure faster lead times. Standardized configurations allow to choose reliable cooling and heating systems more quickly while maintaining the performance, sustainability and quality expected from Refra equipment.
Oasis Twin from the new Refra water to water product line © Brigita Luščinskaitė
More information about the OASIS range, including detailed specifications and technical data, is available in the Refra product brochures online
