The general comfort air-conditioning cold water supply/return temperature is 7℃/12℃. Hot water supply / return water temperature of 60 ℃ / 50 ℃.

Third, the precautions to be taken in the construction
1, prefabrication should pay attention to several issues

In the ventilation project, the air duct production should be based on the project requirements of the selection of suitable materials for the air duct. Design and construction personnel, need to fully understand the different material properties of the duct and they can be used, application occasions, and in what circumstances need to duct insulation, so as to build a set of reasonable and durable ventilation duct network system.

When it comes to air supply system and smoke exhaust system, the figure of stainless steel ventilation duct is indispensable. When using positive pressure air supply fan and fire exhaust fan, the duct is needed to play a temporary retention role for these winds, and then the wind will be successfully discharged or introduced to the position where it should be.

3. Fan coil + fresh air conditioning system
2) Air treatment process of fan coil + fresh air conditioning system
The fresh air and the fan coil each supply air to the air-conditioned rooms. In this way, even if the fan coil unit stops operating, the fresh air will remain unchanged.

Air-conditioning systems generally consist of air-handling equipment and air-conveying ducts, as well as air-distributing devices. According to the need, it can be composed of many different forms of systems.

Step 11: Design of air-conditioning equipment and its piping for cold-keeping and heat preservation, muffling and vibration isolation

Step 1: Familiarise yourself with the original design information of the building you are designing
Including: relevant documents provided by Party A about the project, the use of the building and its process requirements, the design assignment, and the building operation drawings.

4. Noise processing
During the construction of indoor HVAC projects in buildings, due to the influence of equipment quality, installation methods and system running time, the entire system may produce serious noise due to strong vibrations, affecting the service life of HVAC equipment and disturbing users inside the building.

1. Material selection and strict quality control
During the operation of the air conditioner, there are high quality requirements for the internal water circulation of the air conditioner. This is also a link that is more likely to cause problems during the installation process. If the internal water circulation is not established and the water cannot be discharged normally, it will affect the normal operation of the entire equipment.

The air-conditioning system is one of the indispensable supporting facilities of modern buildings, and its power consumption accounts for about 50 per cent of the total power consumption of the building.

In the overall construction process of HVAC technology, HVAC is the core part, coupled with the complexity of the system, the construction industry has high technical requirements, therefore, the construction technicians responsible for the construction must be in accordance with the requirements of the actual design specifications, and actively improve their own technical level, in order to better control the construction focus.