Since 2026, Zhongsong Air Conditioning, leveraging its core patent for vacuum-free installation (Patent No.: CN202323071890.9), has sparked an installation revolution in overseas markets such as Southeast Asia and the Middle East. With its hardcore advantages of "no need for vacuuming, 30-minute rapid installation, and zero fluorine leakage after-sales service", it has received unanimous praise from local installers, distributors, and consumers, becoming a foreign trade hit.

Traditional air conditioning installation requires vacuuming, which is not only time-consuming (30–60 minutes per unit), requires the carrying of professional equipment, but also often leads to issues such as fluorine leakage, poor refrigeration, and compressor burnout due to improper high-altitude operations, resulting in an after-sales rate as high as 15%–20%. Zhongsong's vacuum-free technology addresses these pain points at their root: factory pre-installed high-precision refrigerant, micro-positive pressure sealing of pipelines, and self-sealing quick connectors provide triple guarantees. During installation, there is no need for vacuuming, live working, or professional tools; only a common wrench is required to complete the connection. The installation time per unit is shortened to within 15 minutes, efficiency is increased by over 50%, and the after-sales rate drops sharply to below 3%.

This technology has triggered strong repercussions in the Southeast Asian market. The head of Thai Cool, a leading installer in Ho Chi Minh City, Vietnam, said, "The Nakamatsu non-vacuum air conditioning has completely changed our way of working. Working at heights is safer and faster, and customer complaints are almost non-existent. Now we mainly promote the Nakamatsu brand, and orders have increased by 80% year-on-year!" Bangkok Air Conditioning, a distributor in Bangkok, Thailand, reported, "Due to the high temperature and humidity in the local area, traditional air conditioners are prone to fluorine leakage. Nakamatsu's patented technology is stable and reliable, with a customer repurchase rate exceeding 60%. It is our most profitable brand."

The Middle East market has also received rave reviews. Al Safwa, a dealer in Riyadh, Saudi Arabia, commented: "The desert region experiences extreme high temperatures, making installation challenging. Zhongsong's vacuum-free air conditioner is heat-resistant, easy to install, and has zero malfunctions. It perfectly suits local needs, and within three months of its launch, sales have exceeded 20,000 units."

As of May 2026, Zhongsong's vacuum-free air conditioners have been exported to 12 countries including Vietnam, Thailand, Malaysia, Saudi Arabia, and the United Arab Emirates. Overseas orders have increased by 120% year-on-year, making it a benchmark product for Chinese air conditioning technology to go global.