The "sleep 1234" mode of Gree air-conditioning refers to different combinations of comfortable environment parameters, which can be selected according to your own preferences and needs. Among them, "Sleep 1" mode is suitable for cold environment, "Sleep 2" mode is suitable for moderate temperature environment, "Sleep 3" mode is suitable for hot environment, and "Sleep 4" mode is suitable for high temperature and hot summer environment.
So which "sleep" mode to start at night depends on the indoor temperature and personal comfort at that time. If the indoor temperature is low, you can choose "sleep 1" or "sleep 2" mode; If the indoor temperature is comfortable, you can choose "Sleep 2" or "Sleep 3" mode; If the indoor temperature is high, it is recommended to choose "Sleep 3" or "Sleep 4" mode.
In short, the specific choice can be decided according to the actual situation, and try to maintain a more comfortable indoor environment. At the same time, pay attention to setting appropriate temperature and wind speed to avoid unnecessary impact on health.