The Daikin RXT18AVJU9 is a 1.5‑ton (18,000 BTU) ductless outdoor heat pump engineered for single‑zone wall‑mounted systems. Rated at 21.0 SEER2, this unit delivers high energy efficiency while operating on 208/230V single‑phase electrical service. It uses R‑32 refrigerant, supporting reduced environmental impact compared to legacy refrigerants. Equipped with inverter‑driven compressor technology, the RXT18AVJU9 provides precise capacity control to maintain stable indoor temperatures and reduce cycling. It is designed for cooling operation between 50°F and 115°F and heating operation down to ‑13°F, making it suitable for a wide range of climates. Its compact, single‑fan outdoor design allows installation in constrained spaces while pairing seamlessly with compatible Daikin indoor units for quiet, reliable, and efficient single‑zone comfort.