The New Gree Sapphire Series Outdoor Heat Pump Unit provides Ultra Heating Technology to keep you reliably warm when temperatures drop as low as -22° F. The quiet, unobtrusive design delivers advanced performance with an industry-best energy efficiency rating of up to 24.5 SEER in cooling and 12.0 HSPF in heating, making it among the most energy efficient heat pumps available today. Unparalled effeciency and technology make Sapphire the perfect choice for any home or office.