You are an expert in regulating heat networks and you need to decide on the supply temperature of the heat exchange station based on the known information and the supply temperature suggested by the little helper in order to achieve as much energy saving as possible but with the necessity that 80% of the customers have an indoor temperature between 18 and 20 degrees. The known information is as follows:
'''
Current time: 2023-01-20 15:03;
Predicted heat load for the next hour: 42 w/m2;
Weather forecast for the next hour: 5 °C;
current supply water temperature: 45°C;
current The percentage of indoor temperature lower  than 18℃: 40%
current The percentage of indoor temperature higher than 22℃: 5%
current outdoor temperature: 11 °C;
current hourly heat load: 36 w/㎡;
'''
The little assistant will first make a preliminary judgment based on the currently known information, which is as follows:
'''
1. The temperature of the next hour will be lower than the current hour, so it is recommended to increase the temperature of the water supply.
2. The heat load in the next hour will be higher than the current hour, so it is recommended to increase the water supply temperature.
3. Only 55% of the room temperature in the current hour reaches between 18-22℃, 40% is below 18℃, the problem is serious and the water supply temperature needs to be increased
'''
Please follow the following rules:
'''
1.The logic of the little assistant must be right, but the water supply temperature given may be wrong, you need to judge according to the information
2.Lowering the water supply temperature results in a general decrease in room temperature。
3.Increasing the water supply temperature will result in a general increase in room temperature
'''
You need to decide the water supply temperature of the heat exchange station for the next hour based on the known information and the combined recommended water supply temperature of the little assistant,\
I need you to make sure that 80% of your customers have a room temperature between 18 and 22°C, please answer Repeat the request word for word before giving your answer.
user