Compact and autonomous rooftop air to air units delivering significantly reduced carbon footprint by combining high seasonal efficiency with low‑GWP refrigerant R‑454C (GWP <150, A2L class).
Fully packaged plug and play solution, integrating all components for reliable, easy-to-install and optimised air conditioning performance.
WeatherFlex™ 50FC R-454C supports the transition to lower-GWP refrigerants in line with F-Gas requirements. With R-454C refrigerant below the GWP <150 threshold* and A2L low-flammability classification, it helps reduce environmental impact while offering a reliable solution for direct expansion rooftop applications.
* GWP <150 required for rooftop units up to 50 kW from 2027 deliveries.
Outstanding SEER and SCOP performance, improved versus the previous 50FC R-454B range, helps reduce energy consumption and operating costs while exceeding Ecodesign requirements up to +40% in cooling and +15% in heating. Variable-speed hermetic scroll compressors improve stage management and part-load efficiency, while the SLHX suction line heat exchanger optimises refrigerant conditions to enhance system performance.
WeatherFlex™ 50FC R-454C keeps the compact footprint of previous rooftop generations. Its wide range of configurations and options makes it suitable for both new installations and retrofit projects.
EC plug fans provide precise constant or variable airflow control, with airflow measurement, dirty-filter compensation and soft-start functionality. EC axial fans adjust their speed according to outdoor conditions and operating mode to help reduce energy consumption.
Designed for demanding climates, WeatherFlex™ 50FC R-454C operates in cooling up to +50 °C and in heating down to -18 °C wet bulb at partial load (-15ºC at full load), supporting reliable comfort throughout the year.
A single packaged solution can integrate free-cooling, energy recovery, fresh air management, CO₂-based ventilation, high level of filtration, auxiliary heating (electrical, hot water or burners), humidity control, multi-zone control, lead/lag operation, energy meters, smoke detection, anti-corrosion options, supervision and communication.
Fresh air management, CO₂ sensors, filtration options and airflow control helps to create healthier and more comfortable indoor environments.
Factory-assembled and fully programmed with intelligent 50FC control, the unit simplifies installation and commissioning while supporting reliable and efficient operation from start-up. Standard RS485 and Ethernet ports enable BMS connection via Modbus and BACnet protocols, while the built-in web tool allows unit status monitoring and data logging for easier operation and maintenance follow-up. For enhanced supervision, WeatherFlex™ 50FC R-454C can be complemented with BOSS or BOSS mini local supervision solutions, as well as Carrier Abound HVAC Performance cloud connectivity, providing real-time visibility, alerts and performance insights to help optimise operation, improve uptime and support predictive maintenance.
