When installing a fresh air system, we must first ensure that proper ventilation conditions are available. Fresh air system is a modern living environment optimization equipment which integrates ventilation, air exchange and purification. Its application is inseparable from certain building environment and conditions. The following is a detailed analysis of the ventilation conditions that should be available for the installation of fresh air systems:

1. Differential pressure conditions inside and outside the building
The normal operation of the fresh air system requires a suitable pressure difference between the inside and the outside of the building. This condition determines whether the fresh air system can effectively introduce outdoor fresh air into the room, while discharging indoor dirty air. Therefore, before installing the fresh air system, it is necessary to rationally design the internal and external pressure difference of the building to ensure that the system can work normally.

Second, the air tightness of the building

The operation effect of the fresh air system is closely related to the air tightness of the building. A building with good air tightness can ensure that when the fresh air system is running, the outdoor fresh air can enter the room smoothly, and the indoor dirty air can be effectively discharged. Therefore, before installing a fresh air system, it is necessary to evaluate and improve the air tightness of the building.
Third, reasonable air supply and exhaust outlet Settings
The ventilation effect of the fresh air system is closely related to the location of the air supply outlet and the exhaust outlet. Air supply outlets should be evenly distributed in all areas of the room to ensure that the air can be evenly circulated. The exhaust outlet should be set in a position that is easy to accumulate dirty air, such as the bathroom, the kitchen, etc. In addition, the location of the air supply and exhaust outlets should also take into account the layout of the building, the use of the room and other factors.
Good building structure and spatial layout
The installation of fresh air system needs to consider the structure and spatial layout of the building. Such as the height of the floor, the partition of the room, the setting of doors and Windows, etc., will affect the ventilation effect of the fresh air system. Before installing the fresh air system, it is necessary to have a detailed understanding of the structure and spatial layout of the building in order to work out a reasonable installation plan.
Power supply and control system
The fresh air system needs a stable power supply and control system to support its normal operation. Therefore, when installing the fresh air system, it is necessary to ensure that the layout of the power line is reasonable, safe and reliable, and is equipped with a stable control system to monitor and adjust the system in real time.

Sixth, reasonable pipeline layout
The piping layout of fresh air system directly affects the ventilation effect and energy consumption. The layout of the pipeline should be as simple and direct as possible, reducing elbows and branches to reduce air resistance and improve ventilation efficiency. At the same time, it is also necessary to take into account the insulation and sound insulation measures of the pipeline to ensure the operating effect of the fresh air system and the comfort of the living environment.
Seven, later maintenance conditions
The fresh air system needs regular maintenance and maintenance to ensure its long-term stable operation. Therefore, when installing the fresh air system, it is necessary to take into account the conditions and convenience of later maintenance. For example, the location of the equipment should be easy for maintenance personnel to access and operate, and sufficient space should be left around the equipment for repair and replacement.
To sum up, the installation of the fresh air system needs to have the right pressure difference conditions inside and outside the building, good air tightness, reasonable air supply and exhaust outlet Settings, good building structure and space layout, stable power supply and control system, reasonable pipeline layout and later maintenance conditions. Only on the basis of meeting these conditions, the fresh air system can play its best ventilation effect and optimize the living environment.