The York® Affinity™ Series YZT 19 SEER two-stage heat pump can more closely match your home's needs, allowing it to balance comfort with energy efficiency. The ENERGY STAR certified performance of this split system heat pump means greater energy efficiency and lower utility bills. Pair it with the Affinity™ Hx™ 3 Touch screen Thermostat and experience the peace of mind with remote access and monitoring.