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Enhanced Vapor Injection is a technology specifically designed for cold climates, delivering superior performance even in extremely low temperatures.

Utilizing a DC inverter enhances the efficiency of the heat pump’s operation. Studies indicate that the working efficiency of a DC inverter compressor surpasses that of an AC inverter compressor by 10% to 30%.

At the same time, EVI Technology allows the heat pump to absorb more heat from ambient air at lower climatic conditions, guaranteeing consistent performance even in extreme ambient temperatures as cold as -25°C.

Another benefit that DC inverters present is the reduction of vibration and therefore noise levels. Through adaptive intelligent torque compensation vibration suppression technology, noise emissions are controlled and reduced by 5dB(A). 

Elevate your expectations as the innovative EVI technology raises the bar, allowing the water outlet temperature to reach up to 60°C. Unleash a new whole set of possibilities for your heating needs.


DC Inverter EVI Technology can effectively reduce power consumption and improve the heating capacity of heat pump units to ensure stable performance even at ambient temperatures as low as -25°C.


Discover the unique advantages that set us apart.


Reaching as low as 35dB(A), Silent Mode creates a tranquil atmosphere.

IoT (Internet of Things)

IoT Technology facilitates the remote monitoring and analysis of the heat pump’s status.

Twin Rotary

A Twin Rotary DC Inverter compressor results in a 30% reduction in energy consumption compared to traditional scroll compressors.

Smart Defrost

Tongyi has achieved the development of intelligent defrost processes, aimed at optimising the management of defrosting cycles in air-to-water heat pumps.

24/7 Remote Service

Benefit from round-the-clock remote service support, ensuring assistance whenever you need it, day or night.

R32 | R290

These two environmentally friendly refrigerants lead to a substantial decrease in Global Warming Potential (GWP) and carbon emissions.

Lead Time

Experience rapid deliveries with our swift lead time service, ensuring your needs are met promptly and efficiently.

Smart Control • Wifi

Experience a unique convenience with Tongyi Heat Pump’s smart control feature.


Stay connected with our latest news and upcoming events.


Welcome to Tongyi’s blog! We specialize in Air-to-Water heat pumps. Stay updated on HVAC and renewable energy innovations and join us in creating a greener future.

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Discover our participation in past exhibitions and save the date for future events to discover the potential of sustainable solutions to contribute to a brighter future.

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