1. Zhengzhou Thermal Power Group Co., Ltd. Customer Service Tel: 68890222.

2. Customer service telephone number of East District Heating Branch of Zhengzhou Thermal Power Group: 66345358.

3. Customer service telephone number of North District Heating Branch of Zhengzhou Thermal Power Group: 566 1 1388.

4. Zhengzhou Heating Group Zaozhuang Heating Branch Customer Service Tel: 657 1 1892.

5. Customer service telephone number of Southern District Heating Branch of Zhengzhou Thermal Power Group: 68997003.

6. The customer service telephone number of Zhengzhou Heating Group West District Heating Branch is 86 150936.

7. Customer service telephone number of Zhengzhou Thermal Power Group Economic Development Zone Heating Branch: 6 1286 188.

8. Customer service telephone number of Zhengzhou Heating Group Airport District Heating Branch: 85908635.

When does the heating time start, as follows:

1. Central heating starts at that year 1 1.05 and ends at March 15 of the following year. Specific local heating regulations shall prevail.

2. The standard temperature of central heating is 65438 08℃ 2℃; According to the demand of human physiological conditions for temperature environment, in cold winter, indoor temperature is generally about 5℃ higher than outdoor temperature due to the thermal insulation of houses. When the outdoor temperature is 8℃, the indoor temperature cannot be above 12℃, and people will feel cold.

Therefore, the outdoor temperature limit of heating in China is set at 8℃. Generally below this temperature, central heating will be advanced or postponed free of charge, depending on meteorological conditions.

3. Central heating system is huge and complicated. Starting and closing the heating system is a very tedious job. It takes quite a long time to start the system step by step, so the heating time of central heating cannot be changed at will.