Heil RHF 4-ton single packaged heat pump rooftop unit with R-454B refrigerant, a single-stage scroll compressor and a high-static direct-drive X-Vane indoor fan, 208/230 V 3-phase. AHRI-rated 48,000 Btuh cooling at 13.4 SEER2 / 11.5 EER2 and 45,000 Btuh heating at 6.7 HSPF2; includes a factory refrigerant leak sensor and dissipation control, with electric heat available as a field-installed accessory.