Under the overarching trend of "dual carbon" goals and energy transition, finding a heating technology that can cope with extreme cold climates while also ensuring environmental protection and energy efficiency has become a focus of industry attention. Our R744 CO2 heat pump is a comprehensive energy solution launched under this context, integrating high efficiency, high temperature, high safety, and complete environmental protection. It is an ideal choice to help achieve green building and energy transition in cold regions.
The core of this heat pump lies in its use of the natural and environmentally friendly refrigerant CO2 (R744). As a naturally occurring substance, CO2 has an ozone depletion potential (ODP) of 0 and a global warming potential (GWP) of only 1. This means that it not only performs exceptionally well under current environmental regulations but is also a future-proof "ultimate refrigerant" solution, completely eliminating the pressure of replacement and maintenance caused by the phasing out of policies on chemically synthesized refrigerants.
Through the coupling and linkage of the low-temperature stage of CO2 and the high-temperature stage of the high-efficiency refrigerant, the R744 CO2 heat pump can overcome the physical bottlenecks of traditional single-stage heat pumps in low-temperature environments, namely "significant reduction in heating capacity" and "low outlet water temperature." The CO2 heat pump offers a variety of structural options, including modular integrated units and split units, which can be flexibly arranged according to on-site installation conditions to ensure that each system can maintain long-term stable operation under industrial-grade loads.


| Model | WF-KRF-60Ⅱ/C | WF-KRF-80Ⅱ/C | WF-KRF-120Ⅱ/C | WF-KRF-160Ⅱ/C | |
| Power supply | Three-phase five-wire 380V/50Hz | ||||
| Heating method | Circulating heating type | ||||
| Standard operating conditions | Heating capacity(kW) | 59 | 78.5 | 117.1 | 155.2 |
| Input power(kW) | 24.6 | 30.8 | 45.9 | 60.9 | |
| Water flow(m³/h) | 2.03 | 2.7 | 4 | 5.4 | |
| Low temperature conditions | Heating capacity(kW) | 47.1 | 57.1 | 88.2 | 116.9 |
| Input power(kW) | 23.2 | 26.4 | 40.1 | 53.1 | |
| Water flow(m³/h) | 1.72 | 2 | 3 | 4 | |
| Ultra-low temperature conditions | Heating capacity(kW) | 37.9 | 45.9 | 67.9 | 98.9 |
| Input power(kW) | 20.5 | 24.8 | 36.7 | 53.5 | |
| Water flow(m³/h) | 1.3 | 1.58 | 2.33 | 3.4 | |
| Component Information | Water pipe interface size | DN32 | DN40 | DN40 | DN50 |
| Water heat exchanger | shell-and-tube heat exchanger | ||||
| Air heat exchanger | Copper tube aluminum fin | ||||
| Compressor type | Semi-enclosed reciprocating (frequency converter) / R744 | ||||
| Operation panel | Color Touchscreen | ||||
| Maximum water temperature(℃) | 75 | ||||
| Refrigerant | R744(CO₂)/R134a | ||||
| Design pressure(MPa) | 10MPa(HP)/8MPa(LP)(R744) | ||||
| External dimensions(L*W*H)(mm) | 2050x1200x1950 | 2250x1350x1950 | 2810x1410x2150 | 2150x2070x2250 | |
| Noise(dB) | ≤70 | ||||
| Weight(kg) | 1200 | 1500 | 2000 | 2700 | |
| Scope of application | Supply/Return Water Temperature(℃) | 75/50、65/40、55/45 | |||
| Water supply pressure(MPa) | 0.05~0.4 | ||||
| water supply temperature(℃) | 45℃~75℃ | ||||
| Maximum flow(m³/h) | 3 | 4 | 6 | 8 | |
| Ambient temperature(℃) | -35 ~ 20 | ||||
| Note | Ambient temperature | water temperature | water outlet temperature |
| Standard operating conditions | DB7℃/WB6℃ | 40℃ | 65℃ |
| Low temperature conditions | DB-12℃/WB-14℃ | ||
| Ultra-low temperature conditions | DB-25℃ |
With its excellent high-temperature water output capability and cold-resistant characteristics, R744 CO2 heat pump demonstrates unparalleled adaptability in the following scenarios:
Urban Renovation of Old Buildings (Renovation Projects)
This is the most competitive area for R744 CO2 heat pump. Traditional urban old residential areas often use cast iron radiators as terminals, which typically require water temperatures above 70°C to achieve heating effects. Traditional heat pumps generally output water temperatures below 55°C, making direct replacement difficult. CO2 heat pumps, however, can stably output high-temperature hot water at 75°C-80°C, achieving a seamless green energy replacement without replacing indoor pipe networks and radiators.
Municipal and Public Facilities in Extremely Cold Regions
In high-latitude regions such as Northern Europe, winter temperatures are consistently below -30°C. This R744 CO2 heat pump can still operate stably in environments as cold as -35°C, providing continuous heating for railway stations, border posts, and administrative units.
High-end Villas and Commercial Complexes
For villa owners with extremely high demands for quality of life, or factories and office buildings requiring large-capacity centralized heating, this R744 CO2 heat pump not only provides comfortable heating but also meets the demand for high-quality domestic hot water.
Industrial Specialty Process Hot Water
In addition to heating, its high-temperature output water performance of 80°C can also be widely used in industrial production lines requiring constant-temperature, high-temperature process water, such as food processing, slaughtering, and cleaning.


True Extreme Cold Resistance
Traditional heat pumps often require frequent defrosting or even shutdown for protection below -20°C. Our R744 CO2 heat pump, through technological improvements, can still provide normal heating in ultra-low temperature environments of -35°C, providing a solid support for coal-to-electricity conversion in frigid regions.
Outstanding Energy Efficiency Performance (COP)
Even under harsh operating conditions, the R744 CO2 heat pump maintains extremely high energy efficiency. Experimental data shows that when producing 70°C hot water at an ambient temperature of -12°C, its heating efficiency reaches 2.0; even in extreme environments of -30°C, its COP remains no less than 1.8, far exceeding that of electric boilers and ordinary air-source heat pumps.
Extremely High Hot Water Quality
Utilizing dual-stage compression technology, this R744 CO2 heat pump can achieve a maximum outlet water temperature of 80°C. With a wide range of supply and return water temperature differences (such as 75/50°C or 65/40°C), it can easily adapt to various terminal devices such as underfloor heating, radiators, and fan coil units, resulting in higher heat exchange efficiency.
Safe, Non-toxic, and Non-flammable
Compared to industrial refrigerants such as ammonia, CO2 is non-toxic, non-flammable, and chemically stable, offering a higher safety rating when installed in densely populated administrative or residential areas.
Low Cost Throughout the Entire Life Cycle
Although the initial investment is slightly higher than that of conventional heat pumps, its excellent energy efficiency ratio and the advantage of not requiring modification of indoor terminals, coupled with the low price of refrigerant and the absence of recycling fees, make the overall investment payback period (ROI) of this R744 CO2 heat pump extremely short, making it an economical choice for long-term operation.


Copyright © Suzhou WindFull New Energy Co., Ltd.All Rights Reserved — Privacy Policy