What are the flow and water temperature standards of heating companies?

The heating flow of the heating company should be 0.25m/s, the water supply temperature should be 35-50℃ and should not exceed 60℃, and the temperature difference between supply and return water should be less than or equal to 10℃.

According to the national standard JJ142-2004 Technical Specification for Radiant Floor Heating:

Article 3. 1. 1 The supply and return water temperature of low-temperature hot water floor radiant heating system shall be determined by calculation. The water supply temperature of civil buildings should be 35-50℃, not more than 60℃, and the temperature difference between supply and return water should be less than or equal to 10℃.

Article 3.5.6 The water flow velocity in the heating pipeline shall not be less than 0.25m/s. ..

Extended data:

Indoor heating temperature:

According to the national standard GB/T 18883-2002 Indoor Air Quality Standard 1, the indoor calculated temperature of the main rooms in civil buildings is between 16℃-24℃, and the indoor temperature meeting this standard is indoor comfortable temperature.

In meteorology, the average climate temperature 10-22℃ is defined as spring, and its average value is 16℃, so 17℃ is close to the theoretical median, representing the temperature in spring. If the heating temperature is above 22℃ and the heating temperature is too high in winter, the indoor air will be extremely dry, which will make people feel hot and dry, and the skin of eyes, ears, nose, mouth and throat will also feel dry.

If the heating temperature is as low as 10℃, you will not feel warm, and it will be as cold as winter, which is naturally not the basic purpose of heating. So from the temperature point of view, 18℃ is closer to the physiological needs of human body. Therefore, it is advisable to keep the indoor temperature at 65438 08℃ to 22℃ in winter.

Baidu encyclopedia-technical specification for floor radiant heating

Baidu Encyclopedia-Indoor Air Quality Standard