The fresh air system usually does not have an outdoor unit.
The fresh air system is different from the air conditioner. Most of the fresh air systems do not have an outdoor unit. The core host is usually installed indoors (such as ceilings, cabinets or walls) and is only connected to the outside through pipes to achieve ventilation. The following is a specific analysis:
1. Structural differences between the fresh air system and the air conditioner
Air conditioner: Relying on the outdoor unit (including compressors, condensers, etc.) to achieve cooling/heating, heat exchange must be completed through the linkage of the indoor and outdoor units.
Fresh air system: The core function is ventilation and air purification. The host includes components such as fans, filters, and heat exchangers, and can operate without an outdoor unit. The outdoor air enters the host through the pipe and is purified and then sent indoors, and the dirty air is discharged through another pipe.
2. "Outdoor unit" that may exist in special circumstances
Fresh air system with cold source or dehumidification function: A few high-end models may be equipped with an outdoor unit to assist in cooling / dehumidification, but such products are very rare.
Optimized installation location: In some cases, the fresh air host will be installed outside the air conditioner to reduce noise, but this is not an outside unit, only a choice of host location.
3. Advantages of no outside unit design
Simplified installation: No need to deal with the connection pipelines between the inside and outside units like air conditioners, reducing installation complexity.
Convenient maintenance: Filter replacement, cleaning and other operations are concentrated in the indoor host.
4. Clarification of common misunderstandings of users
Some users confuse the fresh air system with the fresh air function of the air conditioner. The latter is an additional module of the air conditioner (such as the fresh air component of the central air conditioner), which still relies on the air conditioner outside unit to operate, while the independent fresh air system does not require the support of the outside unit.