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DC Inverter Heat Pumps


Heat Pump Solution

DC Inverter Heat Pumps For Central Heating

DC inverter heat pump heating has been proven to be an efficient and sustainable solution in the field of heating. Based on different user requirements and heat pump project demands, we can provide three different heat pump heating solutions: heating only, heating and cooling, and heating and hot water.


With low cost and good insulation effect, DC inverter heat pumps have become a new fashion for comfortable heating in households.

Heating + Cooling

DC inverter heat pumps have the function of heating in winter and cooling in summer, with stable and reliable performance. It also features environmentally friendly and energy-saving, suitable for use throughout the year.

Heating + Hot water

DC inverter heat pumps can be used flexibly to provide both hot water and heating.

Suoher Heat Pump Experts

DC Inverter Heat Pump Types

Our DC inverter heat pumps are divided into split machine and monoblock machine,so you can choose the appropriate installation method based on their own needs.

Split Inverter Heat Pump for Heating

Only the refrigerant circulation system is placed in the outdoor unit. The indoor unit can be installed in a bathroom, kitchen or utility room. Since all the waterway systems are on the indoor side, there won’t be troubled by icing even in extremely cold winters. So split machine will work more safely and reliably in cold regions.

Monoblock Inverter Heat Pump for Heating

It is monoblock design, space-saving and easy to install. Simply connect the waterway and power supply to start up and operate. It runs automatically and stably all day, and has reliable performance.

Control Method

More Intelligent and Convenient Control of Heat Pumps

With WiFi and remote control, DC inverter heat pumps can be more intelligently controlled to improve the quality of life.

WIFI Control

Combining WiFi technology with a DC inverter heat pump unit achieves the control of heating temperature, which can save energy and improve quality of life and efficiency.

Remote Control

The remote control allows you to adjust the temperature anytime and anywhere, achieving high efficiency and energy conservation while ensuring the normal operation of a DC inverter heat pump.

Selection Suggestions for Inverter Heat Pumps

Key Points to Choose a Right Inverter Heat Pump for Heating

Before selecting a model, carefully reading the following key points, which can help you find the model that best meets your requirements.

If You Have Any Questions About DC Inverter Heat Pump for Heating, Please Consult Us Immediately

Suoher experts will communicate with you in time to solve your confusion

Minimum Ambient Temperature

Clarify the minimum ambient temperature at which the unit will operate. The lower the ambient temperature, the less heat can be output by a unit with the same power. Therefore, in winter with lower ambient temperature, high-powered units should be used appropriately to ensure that there is still sufficient heat supply to meet demand at the lowest ambient temperature.

Space Size for Heating

Define the size of the space that needs heating is crucial. The larger the space, the more heat the equipment needs to output, which corresponds to a larger equipment model.

Insulation Effect of Space for Heating

Determine insulation effect of space to be heated. The better insulation effect of the house, the less heat loss and power of the equipment required.

Heating Terminal Equipment

Define the heating terminal equipment used in the room. Different terminal heating equipment require different heating water temperatures. Typically, radiant floor heating requires a heating water temperature of 35 degrees, fan coil units require 45 degrees, while radiators require a water temperature of over 50 degrees.

Suoher Products

Hot Sale Heat Pumps for Central Heating

In order to meet your different needs, we recommend multiple models, each with its own unique features and advantages.
Monoblock DC Inverter Heat Pump (6kW-13kW)

-Small size, integrated design, suitable for family use

-Support cooling and heating

Monoblock DC Inverter Heat Pump (15kW-18kW)

Suoher 18KW DC inverter monobloc heat pumps for house heating, cooling and hot

Monoblock DC Inverter Heat Pump (20kW-25kW)

Suoher 25KW DC inverter monobloc heat pumps for house heating, cooling and hot water. We offer OEM service.

Suoher Project Cases

Suoher Inverter Heat Pumps
are Sold in 50+ Countries around the World

Suoher has established long-term trust relationships with many customers for more than a decade, and we will continue to upgrade our technology to create a green future with you.


Suoher has successfully supplied a considerable number of air source heat pumps and ground source heat pumps to meet the energy needs of our regular customers in Britain. The exceptional performance and reliability of these heat pumps have left our customers extremely pleased and satisfied with their decision to choose our products.


Serbia is cold in winter and snows heavily. Suoher EVI heat pump can provide hot water at 55 degrees Celsius in bitterly cold weather, so it can ensure the supply of heating and hot water for customer rooms. The performance of Suoher heat pumps has received unanimous praise from Serbian customers.

Not only an inverter heat pump manufacturer, but also a promoter of Net Zero Emissions By 2050

Become our partner and help you achieve success in the field of heat pumps. Join Suoher in striving for 2050 net zero emissions!

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Frequently Asked Questions
of DC Inverter Heat Pumps for Heating

  • What is a heat pump and why we choose it to heat and cool?
    What is a heat pump?

    A heat pump is an electrical device that extracts heat from one place and transfers it to another. The heat pump is not a new technology; it has been used around the world for decades. Refrigerators and air conditioners are both common examples of this technology.

    Heat pumps transfer heat by circulating a substance called a refrigerant through a cycle of evaporation and condensation (see Figure 1). A compressor pumps the refrigerant between two heat exchanger coils. In one coil, the refrigerant is evaporated at low pressure and absorbs heat from its surroundings.The refrigerant is then compressed and sent to the other coil, where it condenses at high pressure. At this point, it releases the heat it absorbed earlier in the cycle.
    Refrigerators and air conditioners are both examples of heat pumps operating only in the cooling mode. A refrigerator is essentially an insulated box with a heat pump system connected to it. The evaporator coil is located inside the box, usually in the freezer compartment. Heat is absorbed from this location and transferred outside, usually behind or underneath the unit where the condenser coil is located.Similarly, an air conditioner transfers heat from inside a house to the outdoors.

    The heat pump cycle is fully reversible, and heat pumps can provide year-round climate control for your home heating in winter and cooling and dehumidifying in summer. Since the ground and air outside always contain some heat, a heat pump can supply heat to a house even on cold winter days. In fact, air at –18°C contains about 85 percent of the heat it contained at 21°C.

    A heat pump water heater can heat or cool , the heating function is used the most, and commonly used for house heating, domestic hot water or swimming pool water heating. It absorbs heat from air or ground, then transfers the heat to water for pool water heating, room heating by radiator, underfloor coil or water fan coil. 

    According to the souce of the heat , there are two types of heat pump water heater, one is air source heat pump and the other is ground source (also called earth energy, geothermal) heat pump. An air source heat pump absorbs heat from the outdoor air in winter and rejects heat into outdoor air in summer. It is the most common type of heat pump found in homes at this time. A ground source heat pump which draws heat from the ground (soil, rock) or water (underground water, river, lake), are also becoming more widely used.
    Why we choose it to heat and cool?

    Heat pump is a low-carbon energy-saving product, it is high efficiency, energy-saving, safe and reliable, environmentally friendly, intelligent and durable. It can be used all year round the year. The use of heat pump will not be influenced by bad weather such as overcast, rain, snow, and it does not produce any exhaust gas, waste water and waste residue emissions. 

    The operation cost of heat pump water heater is only 1/4 of the electric water heater, 1/3 of the oil and gas water heater, and 1/2 of the solar water heater, therefore installing a heat pump is an effective way to reduce our energy costs.
  • How many types of air source heat pump do we have?
    Usually, we say air source heat pump for the heat pumps whose heat source is air, which means they absorb heat from the air and transfer the heat to water. However, there are different types of air source heat pumps if we classify them based on the application and the different technology used on the heat pumps.

    Based on the application, air source heat pumps includes air source heat pump for swimming pool water heating (usually we call it swimming pool heat pump) and air source heat pump for house heating or domestic hot water. Based on the different compressor technology, there are on-off (constant frequency) air source heat pump, DC inverter air source heat pump and EVI air source heat pump which works at minus 25 degree.
  • How does the EVI heat pump compressor work?
    Copeland EVI Scroll compressors are equipped with a vapor injection connection for Economizer Operation. Economizing can be accomplished by utilizing a subcooling circuit similar to the circuit shown in Figure 1. This increases the refrigeration capacity and the system efficiency. The benefits provided will increase as the compression ratio increases.

    The schematic shows a system configuration for the economizer cycle. A heat exchanger is used to provide additional subcooling to the refrigerant before it enters the evaporator. This subcooling process provides the increased capacity gain measured in the system. During the subcooling process, a certain amount of refrigerant is evaporated. This evaporated refrigerant is injected into the compressor and provides additional cooling at higher compression ratios.
    The P-h diagram (Figure 2) shows the theoretical gain in system performance acquired by using the economizer cycle. The extension outside of the vapour dome provides the enthalpy increase, enhancing system performance. Although power increases due to the vapour injection into the compressor, there is still a significant efficiency gain because the capacity gain exceeds the power increase.
    (The above content is from EVI Theory of Operation by EMERSONSON Climate Technologies)

    With the EVI heat pump compressor technology, the EVI heat pump is able to work down to  -25℃ the minimum. It works efficiently in heating to provide stable and comfortable heating or hot water for our house.
  • How to work out the swimming pool heat pump's heating capacity needed for our pool?
    It is complicated to work out the heating capacity needed for the swimming pool, if we base on the strict calculation way with all factors considered inside. It's not an easy things for people who are not in the field of heat pumps. Here we'll introduce a simple way to help you to work out the heat capacity needed for our swimming pool. 

    Before the calculation , we need to know the pool size, the initial pool water temperature (usually equal to the ambient temperaure) and the target water temperature. The following is the calculation formula.

    Heating demand of the swimming pool = C * 1.163 * △t  / T


    C = cubage of the swimming pool water  ( in m3 )

    △t = target water temperature  -  initial water temperature

    ( for instance, if you want to heat the pool water from 20℃ to 30℃, the △t  = 30℃ -20℃ = 10℃ )

    T = heating duration ( we can choose 24 hours, 48 hours or 72 hours,  the shorter the time, the quicker the pool water becomes hot, as the heating power of the swimming pool heat pump will bacame larger accordingly)

    If we want to heat up the pool water in short time, we can put the heating duration short, then the heat capacity of the swimming pool heat pump will be larger. The heating duration is the first time to heat up the swimming pool, as usually there is thermal insulation for the swimming pool, the following heating duration will be less than the first time if the thermal insulation is well made.

    With the above instruction , it will help us to work out the swimming pool heat pump suitable for our pool size.
  • What are the advantages of the DC inverter heat pump?
    DC inverter heat pump becomes a trend and popular in recent years. It is well known because of its changeable running frequeny, then what advantages do the dc inverter heat pump has? The DC inverter heat pump is with soft start, so the starting current is low. It can work down to  -25℃,  provides us with comfortable and constant water temperature. It is high efficiency, energy saving, environment friendly, as well low noise.
    1) Soft start, low starting current 

    With soft start function , the heat pump can start smoothly and so reduce the starting current to avoid the trip due to the overcurrent. Besides, because there is no current impacting on the compressor, the lifespan of the DC inverter heat pump machine is prolonged. 

    2) Comfortable and constant water temperature 

    The running frequency of the inverter heat pump compressor is automatically adjusted based on the change of the ambient temperature and water temperature. When the ambient temperature is low, the compressor runs in high frequency and the target water temperature is reached quickly. When the ambient temperature is high, the compressor decreases the running frequency and runs in low frequency to keep the water temperature stable. Thus the room temperature or hot water temperature is always comfortable and constant.

    3) High efficiency and able to work down to -25℃

    As the variable running frequency at the different ambient temperature, it makes the DC inverter heat pump more adaptable to work in low temperature environment and work down to -25℃, meanwhile make sure the efficient heating at low temperature.

    4) Low noise 

    There is no frequent start and stop on the heat pump machine so it is not only less noise but also energy saving. Besides, when the DC inverter heat pump runs in low frequency , the noise is also relatively low, so it provide us more quiet and comfortable environment. 

    5) Energy saving and environment friendly

    As any of other types of the heat pumps , DC inverter heat pump is a low-carbon energy saving product. It does not produce any exhaust gas, waste water and waste residue emissions. The operation cost of the DC inverter heat pump is only 1/4 of the electric water heater, 1/3 of the oil and gas water heater, and 1/2 of the solar water heater, therefore installing a DC inverter heat pump is an effective way to reduce our energy costs.
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