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A contractor in Pennsylvania, US, says, “It was really hard to find space in these units for HVAC. Even standard heat pumps would not work. Where to place the outdoor units was also an issue.”

Choosing an air conditioner, the efficiency, load, design, etc. are all factors that you cannot overlook; but firstly, it has to fit. As seen from the pain points of the contractors and installers, as more and more VRF solutions are being used even in relatively smaller buildings, finding a product that allows flexibility in terms of installation is the key.

Especially for residential buildings, condominiums, and small offices where any small space to use is precious, space for the unsightly variable refrigerant flow (VRF) solution will be something you would not be able to spare.

Companies alike are targeting the new needs. A major player in the heating, ventilation, and air conditioning (HVAC) industry, LG Electronics (LG) has recently launched a compact variable refrigerant flow (VRF) solution using R32 refrigerant, the Multi V S, marking the first in the industry. With its key characteristics of environment friendliness and compact size, Multi V S nevertheless posts high efficiency.

The volume only at around 0.26m3, the dimensions are 834 x 330 x 950 (height x depth x width), much smaller than that of existing VRFs among the same class. This was made possible with the newly adapted single-fan structure, with not only the volume but the weight was also reduced by around 23%.

As an outdoor unit, VRFs are usually placed at the outdoor balcony or spaces should have been spared for the placement. Now, with the reduction in size, installers and building consultants have greater flexibility starting from the building designing to installation stage. Also, considering the striking difference in the height of the product, Multi V S can easily be camouflaged from external view as it is about the height of the balcony railings, posting better external view.

Though the structure has been changed from double to single-fan, the efficiency of Multi V S is even higher than most existing 4-6HP VRFs due to the use of R32 refrigerants and the R1 compressorTM. As a low global warming potential (GWP) refrigerant, the GWP of R32 is around 675, compared to 2,088 of the most widely used R410A. With the industry’s regulation on f-gas emission becoming tighter and tighter, R410A-applied products will need to be phased out by no longer than 2025 as compared to R32 refrigerant-applied products.

Naturally, size is of no use if performance is lost during the reduction in size. This is where LG’s revolutionary R1 compressors comes in. Unlike any other conventional compressors, the R1 compressor is a totally new type of compressor that integrates the strong points of the two distinctive compressors, rotary and scroll type. The R1 compressor has a shaft-through structure with the compression system at the bottom, which solves the tilting issue commonly connected to scroll types but still delivers enhanced efficiency. With the R1 compressor newly adapted to Multi V S, the two main indices that can represent the efficiency of cooling and heating performance, the seasonal energy efficiency ratio (SEER) and the seasonal coefficient of performance (SCOP), have been proven to be higher than the previous model with double-fan structure as well as higher than those among its class that are currently in the market.

One step ahead of the game, LG OOO of OOO emphasized, “The new Multi V S can provide much more flexibility in terms of installation with its compact size and light weight but does not fail to offer high efficiency,” saying, “We believe the Multi V S will see increase in demand as it is the optimal option not only for residential buildings but also for small offices and condominiums with limited space.”

Known for its original technologies, LG will continue to strengthen and innovate its research and development to lead the overall HVAC industry.

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