In 2026, Zhongsong Air Conditioning's patented technology for vacuum-free operation garnered numerous positive reviews in the global end market due to its core advantages of stability, durability, energy efficiency, and hassle-free installation. Its user reputation continued to soar, making it the preferred brand among overseas households and commercial users.

The Nakamatsu vacuum-free air conditioner adopts three patented designs: pre-charged refrigerant, double-layer sealed valve body, and rotary buckle quick connection. It is sealed from factory to installation, completely eliminating the risks of air infiltration and refrigerant leakage, ensuring long-term stable operation of the air conditioner, no degradation in cooling performance, and a 30% extension in compressor life. At the same time, the product is equipped with an efficient compressor and R32 environmentally friendly refrigerant, achieving an energy efficiency of EU A++ standard, saving 25%–30% of energy compared to traditional air conditioners, perfectly meeting the dual needs of overseas users for energy conservation and environmental protection.

Overseas users' positive reviews flood the screen, and their real experiences bear witness to the quality.

Vietnamese user Nguyen (from Hanoi, using for 3 months): "In the summer, the temperature reaches 40℃. The Zhongsong air conditioner cools down quickly and provides comfortable airflow. It took only 15 minutes to install, with no refrigerant leakage. The electricity bill is much lower than that of my neighbors' air conditioners. I strongly recommend it!"

Thai user Siri (Bangkok, household user): "I used to have to add fluorine to my air conditioner from other brands every year. But after using the Zhongsong vacuum-free air conditioner for half a year, it requires no maintenance at all, and its cooling effect has been excellent. It's so worry-free!"

Saudi user Khalid (Riyadh, commercial user): "In the high-temperature desert environment, the Zhongsong air conditioner operates stably at 60°C, is easy to install, has zero after-sales service issues, and offers a cost-effective performance that far surpasses European and American brands!"

Malaysian user Aisha (Kuala Lumpur, apartment user): "The installation technician said this is the most convenient air conditioner, as it doesn't require vacuuming, has low noise, saves electricity, and my family is very satisfied!"

Highly recognized by professional evaluation institutions. Actual testing by HomeTech, a well-known home appliance evaluation website in Southeast Asia: Zhongsong's vacuum-free air conditioning has achieved an 18% improvement in cooling efficiency, a 70% reduction in failure rate, and a 60% reduction in installation time. Its comprehensive score far exceeds that of competing products at the same price point, earning it the title of "2026 Southeast Asia's Most Desirable Air Conditioner to Buy".

Leveraging its patented technology for vacuum-free operation and exceptional quality, Zhongsong Air Conditioning has witnessed a rapid expansion in its overseas market share. From January to May 2026, its export volume surged by 150% compared to the same period last year. Notably, 85% of its customers expressed their intention to recommend the brand to their friends. This has led to a remarkable achievement in both brand reputation and market sales.