In winter, the performance of indoor geothermal heating should not be lower than how many degrees.

The requirements of indoor sanitation for temperature in winter in China include the following parts.

The suitable range of central temperature of room temperature central heating room is 16 ~ 20℃, and that of decentralized heating room is 13 ~ 17℃. The indoor temperature in any area in winter shall not be lower than 13℃.

Vertical temperature difference refers to the difference between the temperature at 0. 1 m above the ground and the temperature at 1.5 m above the ground. The vertical temperature difference is too large, the foot temperature drops, and the body temperature regulation is tense, which is not good for health. General vertical temperature difference should be less than 3℃.

Horizontal temperature difference refers to the indoor temperature difference at each point at1.5m.. Generally, it is easy to catch cold in doorways, windows, corridors and other places, and the indoor horizontal temperature difference is too large, so the horizontal temperature difference should not exceed 2 ~ 3℃.

In 2002, the national indoor air quality standard, namely GB/T 18883-2002, was formulated. It is stipulated that the heating standard in winter is 16 ~ 24℃, and the indoor temperature that meets this standard is indoor comfortable temperature.

The Design Standard for Energy Efficiency of Residential Buildings in Hot Summer and Cold Winter Areas stipulates that the design temperature of bedrooms and living rooms in indoor heating environment in winter is 16 ~ 18℃.

According to the indoor environmental quality standard item in the "Guidelines for Planning and Design of Well-off Urban and Rural Residential Science and Technology Industry Demonstration Community in 2002" formulated by the state, the indoor temperature in heating areas in winter is 16 ~ 2 1℃. According to the standard of "healthy residence" determined by the World Health Organization, the indoor temperature is kept at 16 ~ 28℃ all the year round.

GB 50 189—2005 specifies different indoor temperature standards for different building types such as office, sports, commerce and catering.

The determination method of room temperature is also stipulated in GB/T 18204. 13-2000. The central indoor area of the measuring room is less than16m2; 16㎡ but less than 30㎡ measure two points (the diagonal of the room is divided into three parts, and the second demarcation point is used as the measuring point); Measure three points from 30㎡ to 60㎡ (the diagonal of the room is divided into four parts, and three equal points are used as measuring points); Measure five points above 60m2 (plum blossom is on the second diagonal). The height of the measuring point from the ground is 0.8 ~ 1.6m, and the distance from the wall and heat source should not be less than 0.5m.

National standards are of great significance to national economic and technological development and need to be unified nationwide. National standards are applicable throughout the country, and standards at other levels shall not contradict them. The standards in China have the nature of laws and regulations, and the mandatory standards in China are equivalent to some mandatory regulations in China. Some cities have raised the room temperature standard to ≥ 18℃, which is higher than the national standard.

Three, the room temperature standard from ≥ 16℃ to ≥ 18℃ and then calculate the coal consumption.

In China, cogeneration and central heating are the main methods, and decentralized heating is adopted in some areas. The fuel is mainly coal. The central heating area in China is growing at an average annual rate of 200 million square meters.

If the indoor temperature of central heating areas in China is raised from ≥ 16℃ to ≥ 18℃ in 2005, the indoor temperature will be increased according to the current heating period per square meter (Harbin 36.3kg, Changchun 37.0kg, Jilin 32. 1kg, Shenyang 27.8kg, Dalian 22.7kg, Baotou 40.

China is in the process of rapid urbanization. According to the World Bank's forecast, by 2020, the area of new civil buildings in cities will be100 ~1500 million m2. More than 7 billion square meters of new buildings will need heating. The heating rate reached 40%, and the central heating area reached 6 billion ㎡. According to the current energy consumption level, the temperature will increase from ≥ 16℃ to ≥ 18℃, and the coal consumption in that year will increase by 4.83 million tons of standard coal. It is equivalent to1.900 million m2 of heating coal.

Taking Hohhot, Yinchuan and Lanzhou, whose heating room temperature standard has been adjusted from ≥ 16℃ to ≥ 18℃ (coal consumption is 6 ㎏/m2 × month), the energy consumption increment and coal consumption increment are as follows:

In the winter of 2007, the total heating area of the three cities was144.59 million m2. The average increment of energy consumption is 3.2 1%, which increases the coal consumption by about10.2 million tons of standard coal.