In December, the Sanjiangkou Ecological Tourism Area of Tongjiang City is transformed into a vast silver-white landscape. Behind the China–Russia Boundary Marker No. 244, the Heilongjiang River freezes for thousands of kilometers, forming a natural boundary between China and Russia. Under such extreme climatic conditions, the long-term stability of Heat pump systems becomes a critical benchmark for evaluating the maturity of heating technologies.
Tongjiang City is located in Jiamusi, Heilongjiang Province, directly facing Russia across the river. Known for the saying “where rivers converge, roads begin,” Tongjiang has long been an important transportation hub shaped by nature. At the same time, this geographic advantage brings with it a harsh winter lasting more than half a year. The climate is cold and dry, snowstorms are frequent, and the minimum temperature has historically dropped to –40°C. In such an environment, reliable Heating heat pumps are no longer optional but a daily necessity for public buildings.
Severe cold conditions place extreme demands on all Heat pump systems. With proven reliability, efficiency, and energy-saving performance, AIROSD’s Ultra-low temperature operation heat pump units now provide stable heating for public buildings across Tongjiang. More than 60 Air source heating heat pumps have been deployed, delivering higher outlet water temperatures, stronger low-temperature operation capability, and significantly reduced operating costs. These Heating heat pumps have gradually replaced traditional coal-fired boilers and electric boilers, serving forestry, education, healthcare, and social welfare facilities across six towns and four townships. This marks the large-scale implementation of advanced Heat pump systems along the China–Russia border.
Driven by technology, AIROSD safeguards warmth, stability, and the national border.
In 2025, AIROSD’s Ultra-low temperature operation heat pump units were successively installed at the Tongjiang Port, Party School, township governments, primary schools, clinics, and healthcare centers, as well as in Leye, Qinghe, Linjiang, Xiangyang, Jiejinkou Hezhe Township, Bacha Hezhe Township, Yinchuan Township, and Jinchuan Township. These projects have achieved near-complete coverage of education, healthcare, government services, and public welfare, establishing a rare large-scale benchmark for Air source heating heat pumps in extreme cold border regions. The successful operation of these Heating heat pumps fully verifies the long-term reliability of Heat pump systems in severe cold climates.
During field visits, users consistently expressed high satisfaction with AIROSD Air source heating heat pumps. At Linjiang Township Health Center, a medical staff member noted: “Previously, the boiler system caused unstable water temperatures, uneven indoor heating, and required constant coal feeding and ash removal. After switching to AIROSD Heating heat pumps, indoor temperatures remain stable, maintenance is simple, and overall costs are much lower.” Stable Heat pump systems are reshaping the public heating experience in extreme cold regions.
Only reliable products can truly protect warmth. AIROSD Ultra-low temperature operation heat pump units are powered by advanced EVI heat pump technology combined with environmentally friendly refrigerants and patented defrosting technology. Even at –40°C, Air source heating heat pumps continue to deliver stable heating output, ensuring that Heating heat pumps maintain high efficiency and reliability under extreme conditions.At the same time, these Heat pump systems are equipped with intelligent AI control platforms capable of real-time monitoring of every Ultra-low temperature operation heat pump unit, greatly reducing operational complexity in public-sector applications. EVI heat pump technology is the core technical foundation supporting this outstanding low-temperature performance.
Along the China–Russia border, AIROSD uses advanced Heat pump systems to build a solid barrier of warmth against the cold. These Air source heating heat pumps not only break through traditional low-temperature limitations but have also become essential infrastructure for ensuring public well-being in border regions.
As night falls, stable Heating heat pumps allow forest rangers to remain focused despite freezing temperatures. Continuous operation of Air source heating heat pumps restores warmth to classrooms, stimulating students’ thinking. Reliable Heat pump systems ensure that elderly residents can live comfortably in community welfare centers. This is the driving force behind AIROSD’s long-term commitment to Ultra-low temperature operation heat pump units.
AIROSD — Setting the Benchmark for Large-Scale Heating Applications
For decades, winter heating in cold regions relied heavily on coal-fired and electric boilers, characterized by low efficiency, high costs, and severe pollution. With the acceleration of clean energy transition, Air source heating heat pumps are becoming the preferred solution for sustainable heating in extreme cold regions. Represented by AIROSD, manufacturers leveraging mature EVI heat pump technology and extensive project experience have successfully deployed large-scale Heat pump systems in Heilongjiang, Xinjiang, and Tibet. These projects prove that Heating heat pumps are not only feasible but highly effective in harsh climates.
From nearly 100,000 m² of clean heating renovation in Yining County, Xinjiang, to a single-school project covering 194,000 m² in Tibet using Ultra-low temperature operation heat pump units, and further to public buildings along the China–Russia border equipped with Air source heating heat pumps, AIROSD continues to strengthen its engineering capabilities in Heat pump systems. Rows of stable Heating heat pumps have become a striking technological landscape in winter.
AIROSD — Breaking Harsh Environments with Real Strength
Extreme cold is the ultimate proving ground for Heat pump systems. Mohe, where historical temperatures have reached –53°C, serves as an ideal testing location for Ultra-low temperature operation heat pump units. On December 4, during a live broadcast at the CNAS-certified Mohe testing base, AIROSD’s P7 Air source heating heat pumps had already operated continuously for nearly one month without failure or shutdown.
At –20°C, a “splash water freezing” challenge placed immense stress on the defrosting performance of Heating heat pumps. AIROSD’s proprietary instant defrost technology activated immediately, vaporizing water before freezing and demonstrating the powerful support of EVI heat pump technology for advanced Heat pump systems under extreme conditions.
In addition, AIROSD has developed anti-secondary icing technology and a three-level electronic freeze protection system, providing comprehensive safeguards for Ultra-low temperature operation heat pump units. Through the integration of EVI heat pump technology and intelligent AI management, Air source heating heat pumps enable remote monitoring, automatic adjustment, and data collection, significantly improving the lifecycle efficiency and economic performance of Heat pump systems.
Industry media conclude that repeatedly validating Ultra-low temperature operation heat pump units under natural extreme cold conditions is the most direct and reliable way to refine Heating heat pumps technology. AIROSD remains committed to delivering proven Heat pump systems to extreme cold regions in China and extending their application to Northern Europe, Canada, and Russia, continuously demonstrating the global adaptability of Air source heating heat pumps.
As large-scale deployment of Heating heat pumps and Heat pump systems continues, the misconception that “air source heat pumps do not work in cold climates” is steadily being disproven. Looking ahead, Ultra-low temperature operation heat pump units deeply integrated with EVI heat pump technology will become the mainstream solution for clean heating in cold regions worldwide.
