The PANASONIC Interios Cased A-Coil for Cold Climate Central Heat Pump (4 Ton) provides efficient whole-home heating and cooling, even in extreme cold temperatures. Designed to integrate seamlessly with your furnace, this system features 30°C (-20°F) cold climate heating operation, ensuring reliable performance during winter. The CS-HE36YAC6 indoor unit and CU-HE36YAHK6 outdoor unit are ENERGY STAR® Cold Climate Certified, offering exceptional energy efficiency and long-lasting comfort for your home in colder climates.