SPRSUN Heat Pump CGK-040V3L-B SERIES (15kW) Monobloc Heat Pump

What is the SPRSUN CGK-040V3L-B?

• It is an air-to-water heat pump : it extracts heat from the outside air to heat water for heating (radiators/underfloor heating), possibly hot tap water, and cooling.

• " Monobloc " means that all the cooling equipment (compressor, evaporator, etc.) is housed in the outdoor unit. So you don't need to run any refrigerant lines from the outside to the inside, just the water lines.

• It works with inverter technology (frequency/DC inverter) which allows it to modulate power (adapt to heat demand), which increases efficiency.

• It uses R32 refrigerant , which is more modern, economical and environmentally friendly than many older options.
  

• It is certified with high energy performance, including ERP A+++ .

Technical core values ​​(for the CGK-040V3L-B)

Below are the main technical specifications as taken from the sources:

What is it suitable for / advantages

• For medium to large sized homes or buildings where there is a need for heating + possibly cooling and hot tap water.
  

• Particularly interesting in colder climates, as it can still perform well at low outdoor temperatures.
  

• The modulating effect means that it does not always have to run at full power, which can reduce noise, wear and consumption.
  

• Because it is monobloc, installation is simpler in terms of refrigeration technology (fewer refrigerant pipes).

How does it work?

The SPRSUN CGK-040V3L-B (15 kW) Monobloc Heat Pump operates on the same basic principle as an air-to-water heat pump, but in a monobloc design (all-in-one outdoor unit). Here's a step-by-step guide:

Operation step by step

1. Intake air
   

• The fan of the outdoor unit draws in outside air, even when it is cold outside (down to approx. –30 °C).
  
  

2. Absorbing heat from the air
   

• In the evaporator, a refrigerant (R32) flows along the air flow.
  

• This refrigerant evaporates at a low temperature and thus absorbs heat from the air.
  
  

3. Compression and warming up
   

• The compressor (DC inverter) brings the evaporated refrigerant to a higher pressure.
  

• This causes the temperature of the refrigerant to rise considerably.
  
  

4. Heat transfer to water circuit
   

• The hot refrigerant transfers its heat to the water circuit via a heat exchanger.
  

• This heated water flows to underfloor heating, radiators or a boiler for sanitary hot water.
  
  

5. Coolant liquid again
   

• After the heat is released, the refrigerant cools, condenses and flows back to the evaporator.
  

• The cycle begins again.
  
  

6. Cooling (optional)
   

• In summer, the process can be reversed: the heat pump extracts heat from the indoor water circuit and releases it into the outside air. It thus functions like air conditioning, but via underfloor heating or fan coils.
  
  

Important with this model

• Inverter technology → adjusts power to the heat demand (efficient & quiet).
  

• High COP (efficiency) → usually around 4.5 under standard conditions.
  

• Wide temperature range → continues to function at –30 °C outside air.
  

• Max. 55°C water temperature → suitable for both underfloor heating and low-temperature radiators.
  

• All in one unit → easier to install than split systems, because only water pipes enter.

Key Features

• Full Inverter & EVI technology
  Modulating operation for higher efficiency, longer life and better performance in cold climates.
  

• Energy class ERP A+++
  Very high efficiency; at A7/W35 it achieves a COP of around 4.6.
  

• Use of R32 refrigerant
  Lower Global Warming Potential (GWP) than older refrigerants.
  

• Compact installation
  No indoor unit required; only water pipes.
  

• Smart control
  Touchscreen display, often with WiFi or app control.
  

• Silent operation
  Noise level around 60 dB(A) in nominal use.
  

• Widely applicable
  Heating, cooling and hot water for homes or small business premises.
  
  

Technical performance (indicative)

• Heating capacity : approx. 15–15.8 kW (at A7/W35).
  

• COP : 4.6 at A7/W35 → 1 kW of power produces ± 4.6 kW of heat.
  

• Cooling capacity : approx. 13–14 kW.
  

• Operating range : −30 °C to +45 °C outdoor temperature.
  

• Power : Available in 1-phase and 3-phase versions (depending on model/region).
  

• Dimensions : ± 1110 × 475 × 960 mm.
  

• Weight : around 100 kg.
  
  

Applications

• Medium to larger homes → with multiple bedrooms, underfloor heating or low-temperature radiators.
  

• Offices or small businesses → silent operation and cooling function make it suitable for workspaces.
  

• New construction and renovation → can be integrated with modern heating systems, but also in hybrid setups with an existing boiler.
  

• Cold climates → suitable for Northern Europe thanks to EVI technology.
  
  

Advantages

• Sustainable & environmentally friendly → significantly lower CO₂ emissions than gas.
  

• Cost saving → up to 60–70% lower energy costs compared to traditional heating.
  

• Flexible → one unit covers heating, cooling and hot water.
  

• Space saving → no separate indoor unit.
  

• Reliable → designed for all-season performance.
  
  

Comparison with other models

• CGK-030V3L-B (12 kW) → for smaller or well-insulated homes.
  

• CGK-040V3L-B (15 kW) → mid-range, ideal for larger families or homes of ±150–250 m².
  

• CGK-050V3L-B (20 kW) → for larger homes or light commercial applications.
  
  

Summary

The SPRSUN CGK-040V3L-B (15 kW) is a powerful and versatile monobloc heat pump that combines heating, cooling, and hot water in a single system. It's efficient (COP ~4.6), quiet, suitable for cold climates, and easy to install without an indoor unit. This makes it an excellent choice for families and businesses looking to save energy and make their operations more sustainable.