You can open the window for ventilation. Is it necessary to install a fresh air system?

In terms of environmental protection, health and safety, the new fan is still quite good, comfortable, with uniform temperature and humidity, and can also block mosquitoes and purify the air. According to the current air condition, it will not improve for a while, so a new fan is still necessary.

1. The fresh air system deals with the ventilation environment under the condition of unconditional window opening. For example, in summer, when the temperature is high, the formaldehyde release rate is fast, and when the air conditioner is turned on, the window is closed, and the formaldehyde concentration is high. In the experiment, under the condition of hourly ventilation, the indoor formaldehyde concentration can be reduced by about 40%. For example, outdoor smog in winter, or indoor heating, the same is true of carbon dioxide concentration.

2. When it comes to ventilation, the ventilation volume of window opening is much larger than that of fresh air system. Upstairs, it is said that the window opening air volume is about 4000 cubic meters per hour, and the fresh air is 100-600 cubic meters per hour.

3. As mentioned above, the cost of window ventilation is lower, and the air volume can also be adjusted by the opening size of doors and windows. Besides the smog environment, what value can fresh air have? Fresh air total heat exchange can effectively reduce indoor energy loss. For example, in summer, hot air inhaled indoors and cold air exhausted generate energy exchange, temperature and humidity (enthalpy), which achieves the purpose of ventilation and saves energy.