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.

Concept of HVAC Engineering:
The full name of HVAC in the subject classification is heating, gas, ventilation and air conditioning engineering, which includes three aspects: heating, ventilation and air conditioning, and is functionally an integral part of a building.

System Efficiency Improvement Measures
1. water quality treatment
Corrosion, scaling, and impurity problems caused by poor water quality bring safety risks to system operation, increase the thermal resistance of dirt, and reduce heat exchange efficiency. The system adopts a combination of physical and chemical water treatment methods, and is equipped with a water quality monitoring controller to detect water quality indicators online and transmit them to the controller.

System Efficiency Improvement Measures

1.Heat source and hot water distribution

The heating energy consumption of buildings in hot summer and cold winter regions accounts for more than 30% of the annual energy consumption of HVAC systems. Therefore, energy conservation in heating conditions should also be paid attention to. The design improves energy utilization efficiency from the heat source side and hot water transmission and distribution.

First, the process of processing and production of air ducts
There are many types of air ducts, different air duct production process is different, to the commonly used metal air ducts as an example, its processing and production process is as follows:

First, the process of processing and production of air ducts
There are many types of air ducts, different air duct production process is different, to the commonly used metal air ducts as an example, its processing and production process is as follows:

1.Cold source preparation
As mentioned above, the project builds the system based on the principle of overall system energy saving, and the end system makes reasonable use of high-temperature cold sources.

1. Process requirements
1) Before installing the air duct, check the drawing with the construction site to check whether it can be installed according to the designed elevation and position;
2) Use infrared rays to position and set out the wires to ensure the distance and straightness of the air ducts, and find out the installation position of the suspenders according to the center line of the air ducts, and install the hangers;

The basic situation of the case project and the principle of system construction:
This paper takes the energy station in the terminal area of an airport as an example to discuss the strategies and practices for improving the energy efficiency of the energy station based on the principle of overall energy conservation of the system.