United Kingdom
Catalog   /   Climate, Heating, Water Heating   /   Heating & Boilers   /   Heat Pumps

Comparison Vaillant aroTHERM plus VWL 35/6 A 230 V 3 kW vs Cooper&Hunter Unitherm Monotype CH-HP4.0MIRK 4 kW

Add to comparison
Vaillant aroTHERM plus VWL 35/6 A 230 V 3 kW
Cooper&Hunter Unitherm Monotype CH-HP4.0MIRK 4 kW
Vaillant aroTHERM plus VWL 35/6 A 230 V 3 kWCooper&Hunter Unitherm Monotype CH-HP4.0MIRK 4 kW
Outdated ProductOutdated Product
TOP sellers
The kit comes with a remote control with a touch screen, it is possible to connect to Modbus. When installing additional sensors, you can set the weather-dependent mode. On and off timers. Wi-Fi control. Refrigerant R32. Pipe diameter 1".
Heat sourceair-waterair-water
Suitable forheating and DHWheating and DHW
In box
In box
outdoor unit (monoblock)
outdoor unit (monoblock)
Specs
Operating modeheating and coolingheating and cooling
Max. heat output3.3 kW4 kW
Max. cooling output4.5 kW3.8 kW
Power consumption (heating)0.69 kW0.78 kW
Power consumption (cooling)1.05 kW0.82 kW
EER4.3
Power source230 V230 V
Minimum operating temperature-20 °C-30 °C
Max. water temperature75 °C80 °C
Compressor
 
inverter
Energy efficiency
t°C outside77
Supply t°C35 °C40 °C
COP4.85.1
t°C outside-7
Supply t°C35 °C
COP2.7
More specs
Control via smartphone+
RefrigerantR290R32
Noise level58 dB
Outdoor unit noise level51 dB
Country of brand originGermanyUSA
Outdoor unit dimensions765x1100x450 mm1150x758x345 mm
Outdoor unit weight96 kg
Added to E-Catalognovember 2023march 2021
Glossary

Max. heat output

The maximum heat output generated by a heat pump is the amount of heat it can transfer from the outdoors into the heating system and/or domestic hot water.

The heat output is the most important spec of a heat pump. It directly determines its efficiency and ability to provide the required amount of heat. Note that this spec is shown for optimal operating conditions. Such conditions are rare, so the actual output heat is usually noticeably lower than the maximum; this must be taken into account when choosing. There are special formulas for calculating the optimal value of the maximum heat output, depending on the specific condition.

Max. cooling output

Maximum cooling output delivered by the pump.

The pump operates in the cooling mode removing excess heat from the room to the environment — it plays the role of an air conditioner. The required cooling capacity depends on the area of the building, the specs of its thermal insulation and some other factors; methods of its calculation can be found in special sources. Also note here that conventional heating equipment (radiators, underfloor heating) is not suitable for cooling, for this it is necessary to use special equipment (for example, fan coil units).

Power consumption (heating)

Electric power consumed by the heat pump when operating only for heat transfer, without the use of an additional heating element (if any, see below). The ratio of thermal power to power input determines the thermal coefficient COP (see below) and, accordingly, the overall efficiency of the unit. It also affects overall power consumption (and therefore electricity bills), as well as some power and connection requirements — for example, models powered by 230 V and with a power of more than 5 kW cannot work from an outlet and require a special connection to the mains.

Power consumption (cooling)

For more information on power consumption, see the paragraph above. Here is indicated the consumption of electricity during operation in the cooling.

EER

EER is the ratio of the heat pump's output cooling energy to the input electrical energy.

The higher this parameter, the more economical the device is and the higher its energy efficiency class when cooling. Each class has clear requirements for EER.

Minimum operating temperature

The lowest ambient temperature (air or ground, see Heat source) at which a heat pump can safely and reasonably efficiently perform its functions. Efficiency at minimum temperature, of course, is noticeably reduced, but the device can still be used as a heat source.

The data on the minimum operating T allows you to evaluate the suitability of the pump for the cold season.

Max. water temperature

The highest temperature to which the pump can heat the coolant. It is worth noting that such indicators can be achieved at a fairly high temperature of air or ground. And since heat pumps are used during the cold season, the actual maximum temperature, usually, is less than theoretically achievable. Nevertheless, this parameter makes it possible to evaluate the capabilities of the unit or its suitability for certain tasks.

Compressor

The compressor is the main element, the "heart" of the unit: it circulates the coolant through the heat pump circuits and transfers heat from outdoors to the room. Knowing the name of the compressor, you can find detailed information about it and find out some features of the heat pump as a whole. Note that the name is usually indicated if the device uses a high-end compressor, often an inverter one.

— Inverter. The presence of a compressor with inverter power control in the heat pump. Models without an inverter have only two modes of operation — either on or off; and the set intensity of heating/cooling is provided by turning the compressor on and off for certain periods. In turn, the principle of inverter control is to smoothly change the compressor power, which avoids constant switching on and off. It provides many advantages: minimal wear, no power surges and unnecessary load on the electrical mains, as well as a comfortable (low and stable) noise level.

Supply t°C

The temperature in the flow pipe for which the COP is specified. See below for more details on this coefficient. And this temperature is the temperature of the heat carrier at pump outlet, at which the given COP value is reached.

Note that manufacturers often go to the trick and measure COP for a relatively low temperature (much lower than the maximum temperature of the heat carrier — for example, 35 °C for a model with a maximum of 55 °C). This allows them to give quite impressive performance figures in the specifications. However, at higher temperatures, the actual energy cost per unit of thermal power will be greater and the actual COP will be lower.
Cooper&Hunter Unitherm Monotype CH-HP4.0MIRK often compared