Years on from the introduction of LCAC technology, what validated operational data can you share?
There are several technological developments that have been introduced in recent years to improve the performance, energy efficiency and user experience of these systems. Some of the developments include inverter-driven compressors and other electrical components, which adjust their speed according to the cooling demand, resulting in significant energy savings compared to traditional fixed-speed compressors. This technology has become standard in many ducted split systems and other commercial AC systems, offering better temperature control and lower energy consumption.

Government authorities across the world are also increasingly focusing on meeting, or exceeding, energy efficiency standards set by organisations such as ASHRAE or by rating programmes like SEER (Seasonal Energy Efficiency Ratio). This includes improvements in compressor design, heat exchange technology and overall system efficiency.

When it comes to installation, how important is workmanship? Is the UAE ecosystem of technicians and installers able to execute flawlessly to completely prevent leak of refrigerants?
The installation of air conditioners plays a crucial role in achieving higher efficiency and optimal performance, and is equally important as the design and selection of air conditioning units. Proper installation practices are essential for the long-term efficiency and reliability of the air conditioning system. This includes following manufacturer’s guidelines, adhering to local building codes, and using high-quality materials and components. A professional installer will have the expertise and experience to perform a quality installation that maximises efficiency and performance.

The UAE has been proactive in adopting regulations and standards to minimise environmental impact, including regulations related to refrigerant handling and leak prevention. Achieving flawless execution to completely prevent leakage of refrigerants in the UAE, or in any other region, involves a combination of factors, including regulations, industry standards, technician training, technology and infrastructure. However, achieving perfection in preventing leaks is challenging due to various factors such as human error, equipment failure, and natural wear and tear. While the UAE may have a skilled workforce and stringent regulations, complete prevention of leaks is a continuous effort that requires ongoing training, monitoring and maintenance.

ASHRAE Guideline 41 speaks of proper installation and commissioning. Do contracting companies follow such guidelines to a T? Or, are there deviations that are happening that subvert the manufacturers’ objective of providing the best possible efficiencies?
ASHRAE Guideline 41 provides recommendations for the commissioning process of HVAC systems. Many reputable contracting companies strive to follow such guidelines to ensure the proper installation and commissioning of HVAC systems. However, the extent to which they adhere to these guidelines can depend on factors such as project requirements, client preferences, budget constraints and local government regulations. Sometimes, it is noticed that contracting companies may deviate from ASHRAE guidelines due to factors like cost-saving measures, lack of awareness or differing interpretations of the guidelines. However, any deviations should ideally be justified and transparent to ensure the performance, efficiency and longevity of the air conditioning systems.

What progress is Hisense able to report when it comes to effectively deploying LCAC in high-rises?
Hisense’s LCACs (Light Commercial AC systems) have made significant advancements in all their product types to function effectively in tall buildings. This includes offerings with longer vertical and horizontal copper pipe lengths to ensure efficient distribution of conditioned air throughout the entire height of the building, without significant loss in performance or efficiency. Hisense uses high-efficiency and stable compressors, along with other components, to achieve this. Additionally, advanced control mechanisms have been implemented to manage temperature variations across different floors and areas within the building. The latest inverter systems incorporate energy-efficient technologies, offering high EER values and practices to optimise energy consumption and reduce operational costs, which is crucial in tall buildings with significant energy demands. Furthermore, Hisense systems offer very low noise output by incorporating sound-dampening technology, and optimised fan and compressor designs.