4D Full Inverter Technology
With Nancent 4D full inverter technology, the heat pump can precisely adjust the status of compressor, fan motor, water pump and EEV to achieve the most quiet running at different conditions
Soundproof Insulation of Compressor
Using double-layer soundproof sponge, the noise of the compressor is greatly reduced.
Soundproof Insulation of Compressor Chamber
Equipped with full soundproof sponge on the compressor chamber, the noise of the compressor is further reduced.
Floating Compressor Pan
The floating design of compressor base plate can decrease the running vibration and noise.
Copper Pipe Noise Reducing
After tens of thousands of simulations, the system structure has been optimized for many times such as direction and distance of copper pipes to achieve the best copper-pipe layout with less vibration and noise.
Special Fan Design
The unit uses the big size fan blade with lower speed to reduce the noise level. At the same time, there is only one fan motor for the main models to realize the lower noise level.
Unique Silent Mode
Adopting multiple noise reducing measures to provide you with super quiet running environment, the sound pressure level is as low as 42dB(A) at 1 meter.
The main specification driver ofmonobloc air source heat pumps and split system air source heat pumps for residential dwellings is focussed on selecting a heat pump with the right performance output to match the heating and hot water demands of the dwelling. Other key considerations include potential project restraints that may exist on available internal and external space, as well as acoustic or aesthetic requirements.
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Both monobloc and split system air source heat pumps offer very similar performance outputs. Once a heating engineer has analysed the dwellings thermal performance and calculated the required kW output of a heat pump, the specifier could select either type of air source heat pump to supply the energy required.
It is the differences between the design and operation of monobloc and split system air source heat pumps that may make one more suitable than the other for specification to meet specific project parameters.
The key difference to consider during specification of either a monobloc air source heat pump or a split system air source heat pump is in the size of the space that they need to operate and the position of that space requirement: either inside or outside the dwelling.
In a monobloc air source heat pump, all the components needed to draw energy from the outside air and pass it on to the dwelling&#;s heating system, such as the evaporator, compressor, condenser, expansion vessel and refrigerant in a closed loop circuit, are contained in one large unit. This is positioned on the outside of the dwelling and connects directly through insulated pipes to the hot and cold-water connections of the heating system in a similar way to a conventional gas boiler.
The monobloc air source heat pump is usually positioned in an area that gives sufficient airflow to the unit, whilst being as close to the connections for the heating system as possible, usually a maximum of 6m, to limit heat loss from the pipes.
By contrast, a split system air source heat pump has one unit on the outside and another unit on the inside of the dwelling. The latter contains the condenser and expansion vessel. The outside fan unit contains an evaporator and compressor to draw heat from the air and transfers that energy via refrigerant pipes to the indoor unit.
The choice of placing one large external monobloc unit close to the property or a smaller external split unit further away from the dwelling if required, allows specifiers to take a more flexible approach when considering project space limitations.
The split system offers more flexibility to the specifier due to the smaller footprint requirement for the outside fan unit and, as it is linked to the internal unit by pipes carrying refrigerant, not water, it can be positioned up to 15m away. This gives options to the specifier who may wish to site the external unit away from the house to reduce noise levels for the occupants, for aesthetic reasons, or to maximise external access around the property.
The noise ratings of monobloc and split system air source heat pumps available from a range of manufacturers are broadly similar. If a monobloc unit is compared to the external fan unit of a split system, where both are placed in the same position on the outside of a property, the effect of the external noise on occupants of the dwelling is unlikely to be vastly different.
However, the ability of the split system to move the external fan unit further away from the dwelling will clearly reduce noise levels and, if acoustic comfort is a key factor in the design considerations for a dwelling, then specifiers may choose this a preferred option.
The installation of monobloc and split-system air source heat pumps varies due to the way that each outdoor unit is linked to the system inside the dwelling.
As the connecting pipes of a split system that run between the external fan unit and the internal unit contain refrigerant, the installation must be carried out by an F-Gas qualified installer.
In the case of the monobloc unit, the connecting pipes contain water, so installation is more straightforward and there is no requirement for F-Gas accreditation.
This factor is worth considering when specifying air source heat pumps to ensure suitably skilled installers are available for the size and scale of your residential project.
With regards to the refrigerants used by air source heat pumps, it is worth highlighting that there are several that can be used, and their selection will depend on the choice made by the individual manufacturer that best suits their system. Refrigerants vary in their impact on the environment and details on health and safety and global warming potential (GWP) should always be sought from the manufacturer and included in the appropriate documents supporting any specification.