Rheem launches variable-speed air-source heat pump

Rheem has launched the RP17AY, a variable-speed, inverter-driven air-source heat pump designed for residential applications, featuring high efficiency and broad compatibility for retrofit projects.

The RP17AY system uses R-454B refrigerant, a low-GWP A2L refrigerant with safety features including refrigerant detection and automatic shutdown. It measures approximately 991 mm x 908 mm x 908 mm, weighing 125 kg, and offers capacities from 2 to 5 tons, with cooling capacities up to 60,000 BTU/h.

The system operates on a 208/230 V, single-phase, 60 Hz power supply and employs an inverter-driven twin rotary compressor with variable modulation from roughly 35% to 100%. It achieves a seasonal energy efficiency ratio 2 (SEER2) of up to 17, an EER2 of up to 11.7, and an HSPF2 of up to 9.5, according to Rheem.

Designed as a universal replacement, the RP17AY is compatible with both communicating and legacy controls, supporting a wide range of indoor coils and air handlers with minimal modifications. It also features Rheem’s EcoNet connectivity, enabling Bluetooth commissioning, onboard diagnostics, and remote monitoring, aimed at simplifying installation and ongoing maintenance.

Implications for Residential HVAC Retrofit Market

This launch signals Rheem’s focus on high-efficiency, flexible HVAC solutions that can ease retrofit challenges, potentially accelerating adoption of low-GWP refrigerants and smart systems in residential markets. The compatibility with existing controls and indoor components reduces installation complexity, appealing to contractors and homeowners seeking energy-efficient upgrades.

Rheem’s New Heat Pump in the Broader HVAC Landscape

The RP17AY is part of a growing trend toward inverter-driven heat pumps that combine high seasonal efficiency with low environmental impact. Rheem’s focus on universal compatibility addresses a key barrier in retrofit projects, where system compatibility often complicates upgrades. The use of R-454B refrigerant aligns with industry moves toward lower-GWP refrigerants, although it is mildly flammable, requiring safety measures.

This product follows recent industry developments emphasizing smart controls and integration with connected ecosystems, reflecting a shift toward more intelligent, user-friendly HVAC solutions.

“The RP17AY’s broad compatibility and smart features could significantly streamline residential retrofit projects.”

— an anonymous researcher

Remaining Questions on Safety and Market Adoption

It is not yet clear how widely the RP17AY will be adopted in the market, especially given the mildly flammable nature of R-454B refrigerant and the safety protocols required. Details on long-term performance, cost competitiveness, and real-world energy savings are still emerging.

Next Steps for Rheem and Market Rollout

Rheem is expected to begin shipments of the RP17AY soon, with initial installations and user feedback likely to shape further product updates. Industry observers will monitor how the system performs in diverse retrofit scenarios and how it influences market standards for efficiency and safety.

Key Questions

What makes the RP17AY different from previous Rheem heat pumps?

The RP17AY features inverter-driven variable-speed operation, high seasonal efficiency, universal compatibility for retrofit projects, and smart connectivity through Rheem’s EcoNet ecosystem.

Is the refrigerant used in the RP17AY environmentally friendly?

Yes, it uses R-454B, a low-GWP A2L refrigerant, which is considered more environmentally friendly than traditional refrigerants, though it is mildly flammable and requires safety measures.

Can the RP17AY be installed with existing indoor components?

Yes, it is designed for broad compatibility with both communicating and legacy indoor controls and coils, minimizing modifications during retrofit installations.

What safety features are included with the refrigerant?

The system incorporates refrigerant detection and automatic shutdown to mitigate risks associated with the mildly flammable R-454B refrigerant.

When will the RP17AY be available for purchase?

Specific availability dates have not been announced, but Rheem plans to begin shipments soon, with initial installations anticipated shortly thereafter.

Source: PV Magazine