The MENRED WUHENG Climate Heat Pump is designed for hydronic radiant cooling and heating in WUHENG climate comfort systems. The S3.9–S13.7 range provides nominal cooling capacities from 8 kW to 30 kW and nominal heating capacities from 9 kW to 32 kW. It features DC inverter operation, an integrated water pump and R32 refrigerant.
Built for residential and climate comfort applications, the WUHENG heat pump combines variable-frequency operation with precise water-temperature control. It is designed to work with radiant cooling and heating systems and can be integrated into a broader WUHENG solution with ventilation, humidity control and intelligent climate management.
The compressor can operate at a frequency as low as 10 Hz, supporting continuous output adjustment as system demand changes.
MENRED specifies temperature-control precision of ±0.5°C. The system is designed to support stable water-temperature control for radiant cooling and heating applications.
The minimum heating ambient temperature varies by model. The S3.9 operates down to -25°C, while the S6.3, S9.5, S11.6 and S13.7 operate down to -35°C. Refer to the model specifications when selecting a unit.
Noise levels vary by model and operating mode. The listed cooling/heating noise levels range from 49/48 dB(A) to 54/53 dB(A).
The heat pump is designed for hydronic radiant cooling and heating. It can be integrated into WUHENG climate comfort solutions that include energy recovery ventilation, fresh air and humidity control, and intelligent climate control.
Compare the rated performance of the five available models.
| Model | Cooling capacity | Cooling input | Cooling COP | Heating capacity | Heating input | Heating COP | CSPF |
|---|---|---|---|---|---|---|---|
| S3.9 | 8 kW | 2.46 kW | 3.25 | 9 kW | 2.50 kW | 3.60 | 5.00 |
| S6.3 | 14 kW | 4.34 kW | 3.22 | 15 kW | 4.29 kW | 3.50 | 5.00 |
| S9.5 | 18 kW | 5.59 kW | 3.22 | 22 kW | 6.11 kW | 3.60 | 5.00 |
| S11.6 | 25 kW | 8.04 kW | 3.11 | 27 kW | 7.71 kW | 3.50 | 5.00 |
| S13.7 | 30 kW | 9.66 kW | 3.10 | 32 kW | 9.14 kW | 3.50 | 5.00 |
Nominal heating capacity and COP are listed at 7°C ambient temperature and 45°C outlet water temperature. Cooling ratings are listed at 35°C ambient temperature and 7°C outlet water temperature.
| Model | Cooling ambient range | Heating ambient range | Power supply | Noise, cooling/heating | Water flow | Connection | Dimensions (L × W × H) | Weight |
|---|---|---|---|---|---|---|---|---|
| S3.9 | -5 to 53°C | -25 to 42°C | 220V~/50Hz | 49/48 dB(A) | 1.4 m³/h | DN25 | 1100 × 420 × 700 mm | 107 kg |
| S6.3 | -5 to 53°C | -35 to 42°C | 220V~/50Hz | 49/48 dB(A) | 2.4 m³/h | DN25 | 1100 × 420 × 1100 mm | 158 kg |
| S9.5 | -5 to 53°C | -35 to 42°C | 220V~/50Hz | 52/50 dB(A) | 3.1 m³/h | DN32 | 1100 × 420 × 1450 mm | 196 kg |
| S11.6 | -5 to 53°C | -35 to 42°C | 380V/3N~/50Hz | 53/52 dB(A) | 4.3 m³/h | DN32 | 1150 × 420 × 1750 mm | 221 kg |
| S13.7 | -5 to 53°C | -35 to 42°C | 380V/3N~/50Hz | 54/53 dB(A) | 5.2 m³/h | DN32 | 1150 × 420 × 1750 mm | 251 kg |
The range includes five models, S3.9 to S13.7, with nominal cooling capacities from 8 kW to 30 kW and nominal heating capacities from 9 kW to 32 kW.
No. The listed heating ambient range is -25 to 42°C for S3.9 and -35 to 42°C for S6.3, S9.5, S11.6 and S13.7. Check the project design temperature and heating load when selecting a model.
The listed cooling ambient operating range is -5 to 53°C for all five models.
The listed refrigerant is R32.
Yes. The WUHENG heat pump has an integrated water pump. Rated water flow varies by model from 1.4 m³/h to 5.2 m³/h.
The product is designed for hydronic radiant cooling and heating applications. Confirm water-temperature requirements, system design and model capacity for the specific project.
Noise levels depend on the model and operating mode. The brochure lists values from 48 dB(A) to 54 dB(A); see the model table for cooling and heating figures.
Model selection depends on the building load, local design temperature, required water temperature and terminal system. Contact MENRED with these project details to confirm a suitable configuration.
Contact MENRED with your project load, design outdoor temperature, water-temperature requirements and terminal system to discuss model selection and system integration.
Since its inception in 1995, Zhejiang Menred Comfort System Co., Ltd., affectionately known as Menred, has firmly established itself as a beacon of innovation and excellence in the global manufacturing industry. Specializing in 'radiant heating and cooling, ventilation, water purification, and smart home' systems, Menred is not only a trusted partner of the National Key Laboratory of 'Future Building' but also proudly serves as a certified factory for Electrolux AB, a leading name in the global appliance arena. At 'MENRED Comfort Home', we have ambitiously evolved from mere temperature control solutions to comprehensive systematic air conditioning systems. Our focus is not just on cost-effective solutions but on pioneering energy efficiency, putting the user's needs at the heart of our product development. Our passion extends to creating sublime comfort home product solutions, spearheading the innovative development of green building equipment, and delving into the engineering application and research of Building Integrated Photovoltaic (BIPV) and energy storage solutions. Within the esteemed Menred group, we proudly house 4 National High-tech Enterprises alongside 3 enterprises recognized for High-quality Technological Advancement. These enterprises have not only been conferred with the prestigious national title of Technologically Advanced Little Giant' but also have been distinguished as Service Oriented Manufacturing Demonstration Enterprises, signifying our commitment to excellence and innovation.
