Is it necessary to install fresh air in central air conditioning?

Is it necessary to install fresh air in central air conditioning? ? ?

1. What's the difference between central air conditioning and fresh air system?

Central air conditioning is a temperature control system, which mainly regulates the indoor temperature; ?

The fresh air system filters, updates and purifies the indoor air around the clock, so as to improve the freshness of the indoor air and keep the indoor oxygen sufficient.

2. With central air conditioning, do you need a fresh air system?

Generally, central air conditioning needs to be used in a relatively closed space, so as to keep the indoor comfortable temperature and avoid the exchange with the outdoor temperature, which will lead to indoor supercooling or overheating. ?

Closed space is more likely to cause the problem of stuffy indoor air. ?

Moreover, the central air conditioner can only cool or heat, and it can't prevent harmful gases such as outdoor PM2.5 and smog from entering the room, and of course it can't replace indoor exhaust gas. ?

The main function of fresh air system is to exhaust the indoor dirty air even through the air supply outlet, and then input the outdoor air into the room after purification and filtration, which is impossible for central air conditioning.

3. Conclusion

So central air conditioning and fresh air system are two completely different functions. ?

After installing central air conditioning, if you want to make indoor air quality better, you need to install fresh air system. ?

If the budget permits, the central air conditioning and fresh air system can be turned on at the same time to ensure comfortable temperature and air quality.