As electrification and decarbonization continue reshaping HVAC, hybrid heat rooftop units (RTUs) are quickly becoming a transformative technology for light commercial buildings delivering greater efficiency, lower emissions, and dependable year-round performance.

This session explores the technical fundamentals of hybrid heat RTU technology of Carrier’s WeatherMaster™ 48QE, detailing how heat pump and gas heat operation work together to optimize energy performance, climate flexibility, and occupant comfort.

Attendees will gain insight into system design considerations, operational sequences, defrost functionality, climate-based application strategies, and control logic, while learning how hybrid heat rooftop systems align with evolving building standards, replacement opportunities, and broader electrification initiatives.

Key Takeaways:

• How hybrid heat RTUs support electrification and decarbonization goals in light commercial applications
• Technical operation of combined heat pump and gas heat rooftop systems
• How changeover temperatures affect efficiency, comfort, and operating costs
• Defrost operation and cold-climate performance considerations
• Best-fit applications across climate zones
• The role of the WeatherMaster™ 48QE within Carrier’s light commercial rooftop portfolio

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