What year is the Grand Hyatt Gree 1.5? 20 15. According to the inquiry of Gree official website, Gree Grand Hyatt series is a new product in 20 15 years. The indoor and outdoor air of 1.5p inverter air conditioner is very atmospheric, with large evaporator area and rapid and strong refrigeration. Zhuhai Gree Electric Co., Ltd., founded in 199 1, is an international household appliance enterprise integrating R&D, production, sales and service, with three brands of Gree, TOSOT and Jinghong, and mainly engaged in household air conditioners, central air conditioners, air energy water heaters, mobile phones, household appliances, refrigerators and other products.