Fresh-Air AC Captures 6% of China's Air-Conditioner Market

To maintain cooling performance, an air-conditioned room normally needs to remain enclosed. The indoor air then recirculates continuously, so carbon-dioxide concentration can rise over time while humidity and oxygen levels fall. Comfort declines and, in severe cases, occupants may experience symptoms commonly associated with prolonged air-conditioner use. Limiting operating time can save energy and support health, but high summer temperatures often make it impractical to switch the unit off.

Improving air quality in a closed, air-conditioned room therefore became an important direction for manufacturers. Haier introduced the first fresh-air air conditioner in 2018. Within the following six months, Hisense, Midea, Gree, Xiaomi and other brands launched their own products, turning fresh-air capability into a major industry trend.