1. Project Vision and Features
V city is a flagship shopping mall developed by Sun Hung Kai Properties in Tuen Mun and managed by Kai Shing Management Services Limited. Offering over 140 renowned stores and restaurants, the mall exemplifies not only a high quality, diverse retail experience but also outstanding energy efficiency, active community engagement, and operational innovation, as recognized by multiple prestigious accolades. Through these impactful initiatives, V city aims to build a truly sustainable, resilient, and replicable low energy building network, setting a benchmark for transforming high density commercial buildings in Hong Kong.
To align with Hong Kong's Climate Action Blueprint 2050, V city proactively advances its ESG goals through innovative smart technology and sustainable practices. Recently, the mall upgraded its chillers to highly energy efficient models. These systems use environmentally friendly, low GWP refrigerants and advanced AI-powered optimization systems. These efforts have resulted in V city ranking in the top 10% for energy performance among similar properties. It has also earned the BEAM Plus EB V2.0 certification, solidifying its leadership in sustainability in the retail sector.
2. Technological Innovation and Green System Integration
2.1. AI-Driven Optimization and Efficiency
V city’s operational strategy centers on an advanced, cloud-based AI Chiller Plant Optimization Energy Management System. This marks a significant step forward in intelligent building management. It analyzes live sensor data to optimize chiller sequencing, setpoints, flow rates, and cooling tower operations, ensuring that the Mechanical, Ventilation, and Air Conditioning (MVAC) system, the building’s largest energy consumer—operates at peak efficiency under varying occupancy and weather conditions. The system analyzes live sensor data to optimize chiller sequencing, setpoints, flow rates, and cooling tower operations. This ensures the Mechanical, Ventilation, and Air Conditioning (MVAC) system operates efficiently under varying occupancy and weather conditions. Its intelligence relies on a comprehensive IoT sensor network for both air conditioning and lighting. Real-time CO₂ data enables demand-based ventilation. The system adjusts fresh air supply to match occupancy. Continuous monitoring and analytics detect anomalies, anticipate maintenance needs, and recommend schedules based on equipment performance. This predictive approach helps the engineering team shift from reactive to proactive maintenance. They address issues early and plan interventions before failures occur.
Graph 1. Chiller Plant Annually Energy Consumption & Accumulated Savings from 2019 to 2025
2.2. Future Trend Alignment
2.2.1. Scalable Electric Vehicle Infrastructure
V city promoted low-carbon initiatives among stakeholders, significantly reducing transportation emissions. By providing 17 bicycle parking spaces, we encouraged less car use and zero-emission travel. Additionally, nine 60-kW electric vehicle chargers in our parking garage supported electric vehicle adoption, cutting Scope 3 emissions from commuter and visitor travel by an estimated 75,600 kg annually. Recognizing the shift to zero emission transportation, V city has embedded future-ready EV charging by dedicating extra electrical conduits and data links. This allows seamless network expansion and meets growing demand and evolving government policies. An AI-powered Thermal Camera Monitoring System complements this infrastructure. It addresses safety challenges, offering real-time thermal monitoring and proactive fault detection. This sets a benchmark for safe, intelligent EV infrastructure in commercial buildings.
Figure 1. Bicycle Parking Facilities
Figure 2. High-Power Electric Vehicle Charging Stations in Parking Garage
2.2.2. Low GWP Refrigerant Transition
V city is proactively addressing the global imperative to mitigate climate change. We are undergoing a phased, critical replacement of the central chiller, the core of the building's cooling system. Work is underway to replace the outdated 400-ton chiller No. 4 and 950ton chiller No. 3. Since 2013, these units have operated with a low coefficient of performance (COP) of 5.27, producing less cooling per unit of energy than modern systems. They use R-134a, a refrigerant with high global warming potential (GWP) that is being phased out internationally. We are replacing these constant speed drive (CSD) units with variable speed drive (VSD) centrifugal chillers for greater efficiency, using ultra-low GWP refrigerants such as R-514A (GWP < 2). The project is progressing smoothly. Two new chillers have been installed and are undergoing final testing and commissioning. Full operation is imminent. This upgrade is a transformative engineering improvement. The new chillers have a high non-standard part load value (NPLV) of 10.72, measuring efficiency during typical conditions. This is a 60.2% improvement in part load efficiency compared to the old units. It directly reduces the building's maximum energy load, ensures compliance with the Building Energy Code and international agreements, and delivers long-term operating cost savings. This forward-looking choice not only reduces direct greenhouse gas emissions but also ensures long-term compliance and positions V city as a leader in climate-conscious building services.
Figure 3. Installation of the New High-Efficiency Chiller Unit No. 4
2.3. On-Site Renewable Energy Generation
V city demonstrates its commitment to decarbonization by integrating on-site renewable energy generation. The approach to carbon neutrality is proactive and covers all building services and operations. Carbon emissions are addressed through three pillars: renewable energy generation, energy conservation optimization, and policy and stakeholder engagement. This strategy delivers lasting, measurable contributions to sustainable building practices.
As part of these strategic pillars, a 10-kilowatt solar energy system was deployed on the roof of footbridge No. 6. Since commissioning in April 2020, the system has consistently supplied clean, reliable power, reduced grid electricity consumption and associated carbon emissions. To date, it has generated over 44,000 kWh of renewable electricity, reducing CO₂ emissions by 20,900 kg. This project demonstrates the integration of buildingintegrated photovoltaics (BIPV), with solar panels incorporated directly into buildings or infrastructure components to maximize decarbonization.
This project showcases the successful application of building-integrated photovoltaics (BIPV) within a high-density urban environment, demonstrating that even in spaceconstrained commercial settings, renewable energy can play a meaningful role in the overall sustainability strategy.
Figure 4. Solar Panel Installation on Footbridge No. 6
2.4. Energy-Saving Measures Integration
Beyond AI-driven chiller optimization, V city has a comprehensive, multi-layered strategy to minimize energy consumption across all building systems. The energy-saving approach uses a holistic system. It reduces energy use without compromising comfort or commercial function. The strategy covers central air conditioning, the building envelope, and lighting.
It supports a 39.42% reduction in energy use by 2025 compared to a 2014 baseline. The building is now dynamic, responsive, and intelligently managed. An energy audit confirmed an Energy Usage Intensity (EUI) of 155.54. This places V city in the top 10% of energyefficient buildings in Hong Kong and demonstrates the effectiveness of these engineering interventions.
Graph 2. Annual Energy Consumption and EUI from 2014 to 2024
Graph 3. EUI Performance Ranking among Hong Kong Buildings
2.4.1. Comprehensive Lighting System Upgrade
V city has completed a building-wide LED retrofit, replacing outdated fluorescent and halogen lamps with dimmable, high-lumen LEDs to reduce artificial lighting waste. Quantified results show annual savings of approximately 67,281 kWh for advertising signage, 45,000 kWh for dining area lighting, and 47,955 kWh for downlights. The retrofit of 990 main arcade downlights reduced power per fixture from 33 to 22 watts. An IoT lighting control system with connected lux sensors in open areas, the atrium, and other spaces automatically adjusts lighting to ensure lights are on only as needed and at the proper intensity.
Figure 5. Retrofit of 990 main arcade downlights
2.4.2. Building Envelope Optimization
To reduce cooling demand, the building envelope was improved by applying solar films to existing glazing. This measure reduces solar heat gain and the chiller's load, saving 18,180 kWh of electricity per year. The strategy complements the building's design, where large glass areas maximize daylight penetration, further reducing the need for artificial lighting and enhancing the visitor experience.
Figure 6. The Installation of Solar Film
2.4.3. Vertical Transportation System Upgrade
V city has enhanced its vertical transportation systems with dual-speed escalators that operate at full speed during peak hours and automatically switch to a reduced, energysaving speed during periods of low footfall. This smart adaptation achieves significant energy savings, enhances safety, and provides a more comfortable boarding and alighting experience when the mall is less crowded.
This is complemented by a Centralized Control Panel and the Elevator Visual Communication System (ELVIC), which enable real-time monitoring and dynamic adjustment of lift and escalator operations for maximum efficiency. The Centralized Control Panel provides immediate access to live operational data, supporting quick, informed decisions. Operating patterns, service periods, and stopping floors can be adjusted instantly at the panel or remotely through ELVIC, a digital interface for off-site management. This flexibility optimizes passenger flow and reduces waiting times during special events or maintenance.
2.4.4. Air Handling System Optimization
To improve mechanical efficiency in the MVAC system, V city replaced traditional fans in air handling units with high-efficiency Electrically Commutated (EC) plug fans. To improve mechanical efficiency, we replaced traditional fans with high-efficiency Electrically Commutated (EC) plug fans in air handling applications, saving an estimated 345,000 kWh. This upgrade significantly reduces parasitic energy loads from air movement and works in concert with the AI chiller optimization and demand-based ventilation controls to create a fully integrated, highly efficient HVAC system.
Intelligent control is extended network-wide using IoT sensors that automate adjustments, enabling optimal start-up and shutdown of air handling units, demand-based ventilation based on real-time CO₂ levels, and ongoing system setpoint re-commissioning. These measures support overall energy savings goals.
2.5. Innovative Financing & Public-Private Collaboration
The successful implementation of V city's advanced energy-saving initiatives has been significantly supported by innovative financing and strong public-private collaboration. A prime example is the AI-powered Chiller Plant Optimization Energy Management System, which was fully funded by a HKD 198,000 grant from the CLP ECO Building Fund. This competitive scheme supports projects that demonstrate clear environmental benefits and technical innovation, validating V city's approach as both effective and commercially viable. This collaboration resulted in a zero-payback period for the project, accelerating its return on investment and demonstrating how incentives can catalyze the adoption of sustainable technologies.
Beyond financial support, V city actively collaborates with government departments and public bodies to amplify its impact. Participation in the Environmental Protection Department's food waste collection pilot program and collaboration with the Hong Kong Environmental Protection Society on festive plant recycling are testaments to this commitment. We actively participate in the Environmental Protection Department's food waste collection pilot program and lead the development of organic waste solutions. By creating a direct, point-to-point logistics chain, we transport food waste to O·PARK 1 and 2, government facilities that convert organic waste into energy. Additionally, we collaborate with the Hong Kong Environmental Protection Society to innovate a process that recycles festive plants, such as Christmas trees and Lunar New Year flowers, into fertilizer, reducing carbon emissions by about 800 kilograms.
Furthermore, the mall serves as a key node in the Hong Kong Police Force's "Project Shield" through the installation of "Angel Boxes," demonstrating how private commercial assets can contribute to city-wide public safety networks. We have installed over nine "Angel Boxes" at our main entrances. This is part of a collaboration with the Hong Kong Police Force's New Territories South Region "Project Shield." These devices use advanced Bluetooth positioning to help locate high-risk missing people, such as elderly individuals with dementia. By serving as a key node in this safety network, we move beyond the traditional role of a shopping mall. We actively support city-wide efforts to protect vulnerable community members and foster a safer urban environment.
V city collaborates with utility providers and community organizations. Participation in the CLP Power Summer Energy Savings Rebate Program reduced energy usage for the mall, tenants, and visitors. The recycling program covers 37 material categories, with convenient bins for items from plastic bottles to USB cables, encouraging customer participation in circular economic initiatives. This effort earned V city the 2024 Energy Saving Promotion Pioneer Award. The mall also partners with charitable organizations, such as sponsoring Lok Sin Tong, extending its impact beyond its physical footprint, and contributing to broader community and environmental goals.
Figure 7. Community Engagement for the CLP Power Summer Energy Savings Rebate Program
3. Inspiration Value and Industry Benchmarking
3.1. Pioneering Applications of Modular Integrated Construction
V city has proactively applied prefabrication and pre-assembly principles to improve quality, safety, and speed in critical upgrades, demonstrating the practical application of Modular Integrated Construction (MiC) concepts within an operational commercial building. For the chiller plant replacement, key components, including pre-piped valve assemblies and control panels, were fabricated and tested off-site in controlled factory conditions before delivery and installation. This approach significantly reduced complex on-site welding and wiring, shortened the installation timeline, minimized errors, and reduced disruption to ongoing mall operations.
This pre-assembly approach was extended to other mechanical systems. The AI-powered cloud chiller optimization system utilized standardized, pre-configured sensor kits and communication gateways. These plug-and-play modules enabled quick, reliable integration with the existing Building Management System, removing the need for extensive on-site programming. By selectively applying prefabrication to complex assemblies, V city improved quality assurance, enhanced site safety by reducing hot-work activities, and ensured more predictable, efficient project delivery. This approach serves as a replicable model for other commercial buildings seeking to undertake major system upgrades with minimal operational interruption.
The project also demonstrates strong integration of Mechanical, Electrical, and Plumbing systems through a digital-first approach. By leveraging Building Information Modeling, detailed 3D coordination, and efficient clash detection, optimized service routes for ductwork, piping, cable trays, and conduits in ceiling voids and plant rooms were established before construction began, eliminating costly on-site rework and conflicts. This integrated design enabled the seamless incorporation of new technologies into the existing building. For the IoT sensor network supporting smart lighting, IAQ monitoring, and vertical transportation, pre-coordinated pathways for low-voltage cabling, power, and data were engineered. For future expansions, dedicated electrical conduits and data links for the EV charger network were included as part of an integrated MEP bundle, ensuring future installations are efficient and non-disruptive. This approach results in a highly efficient, maintainable, and adaptable building services infrastructure that maximizes space and long-term performance.
3.2. Cross-Sector Replicability and Influence
The comprehensive sustainability and smart building strategies implemented at V city offer a highly replicable model for high-density commercial buildings across Hong Kong and beyond, with influence extending across multiple sectors. The AI-powered, cloud-based chiller plant optimization system, custom-engineered to integrate with existing legacy infrastructure, demonstrates that advanced energy management is achievable without requiring a complete system overhaul. This mature, internally developed system positions V city at the forefront of the global shift toward autonomous, data-driven building operations and provides a scalable model for intelligent, self-optimizing buildings capable of meeting tightening carbon reduction targets and evolving grid demands.
The project’s approach to future-proofing infrastructure sets a practical benchmark for the retail and commercial property sectors. By detailing the integration process of dedicated electrical conduits and data links for EV charging networks within the MEP bundle, and combining with AI powered thermal camera monitoring for safety, V city provides a clear template and step-by-step reference for other buildings to design and embed scalable EV infrastructure that supports growing demand and policy shifts.
V city’s recognition through numerous prestigious accolades, including the Grand Award of the HKIE Excellent Building Award, the 2024 EMSD O&M Best Practice Award, the 2025 Excellence in Facility Management Award, the BEAM Plus EB V2.0 certification, and the
UNSDG Achievement Awards Hong Kong 2024 Merit Award, validates the effectiveness
and replicability of its approach. These external endorsements, combined with measurable outcomes such as achieving a top 10% energy performance ranking among similar properties, a 39.42% reduction in energy consumption toward the 2025 target, and cumulative chiller energy savings of 1,050,000 kWh, provide compelling evidence that the V city model delivers both environmental and operational excellence. By sharing these practices, V city aims to inspire and guide other property owners and managers in transforming high-density commercial buildings into sustainable, resilient, and intelligent assets.
4. Operational Governance and Policy Integration
4.1. Closed-Loop Management Framework
V city’s operational governance is built on a robust, closed-loop management framework that ensures continuous improvement and accountability. At the heart of this system is a cross-functional Green Team that brings together leaders from leasing, technical services, marketing, and finance. This diverse collaboration ensures sustainability is a collective responsibility, with ESG principles intentionally integrated into both strategic planning and day-to-day operations. This approach cultivates a culture of shared ownership and holistic problem-solving.
To sustain momentum and ensure accountability, a rigorous framework of regular, structured meetings has been established. In these sessions, the Green Team monitors progress toward ambitious ESG targets, addresses complex challenges, and ensures alignment across all departments. This collaborative approach is anchored by publicly declared 2025 goals, which include measurable targets such as reducing energy consumption by 40% from the baseline of 2014 and achieving an 85% construction waste diversion rate. These transparent objectives unify all projects and clarify each team member’s contribution to the mission.
The closed-loop framework is further strengthened by digital systems that provide realtime visibility and control. The Spare Parts Management System uses RFID tracking to monitor critical components such as variable speed drive modules, BMS controllers, and specialized pump seals. Automated low-stock alerts prevent shortages and streamline inventory management, strengthening operational resilience and business continuity. Electronic inspection forms, managed through an E-form platform, digitize patrol and maintenance workflows, synchronizing data in real time across departments. This digital backbone transforms maintenance into a predictive, data-driven process, enabling the engineering team to shift from reactive to proactive maintenance, addressing issues early and planning interventions before failures occur.
Accountability is institutionalized through a robust performance management system. ESG performance metrics have been formally embedded into the company-wide staff appraisal process, the Kai Shing e-Appraisal system. This strategic integration makes achieving specific sustainability Key Performance Indicators a measurable and impactful component of every employee’s professional evaluation and development. By directly linking performance reviews to environmental and social objectives, strong individual and collective incentives are established, ensuring that sustainability leadership is not merely an aspirational value, but a daily practice upheld by a motivated, skilled, and accountable team.
4.2. Tenant Engagement
V city recognizes that achieving sustainability goals requires active collaboration with tenants. A comprehensive Green Renovation Policy has been established to guide all tenants’ fit out works. This policy sets strict limits on wastewater, construction waste, and air emissions, using quantitative targets and monitoring for compliance. Tenants are encouraged to retain original design features, reducing material replacement and embodied carbon. The policy requires the use of low-VOC materials, modular partitions, and accessible service chases. Implementation has led to less renovation landfill waste and lower volatile organic compound emissions, collectively cutting the carbon footprint of construction and renovation. A key outcome of this policy is the diversion of 85% of construction waste from landfills, demonstrating the policy’s sustainability impact.
Tenant participation in carbon reduction is actively promoted through various engagement initiatives. The Smart Procurement Policy supports this philosophy by prioritizing environmentally friendly products and sustainable suppliers. Tenants are encouraged to join circular economy initiatives through the extensive recycling network spanning 37 material categories, which provides convenient bins and drop-off points for items ranging from plastic bottles to USB cables. Participation in the CLP Power Summer Energy Savings Rebate Program demonstrates this collaborative approach, as both the mall and its tenants work together to reduce energy usage and costs. This effort was recognized when V city received the 2024 Energy Saving Promotion Pioneer Award at the Smart Energy Awards Ceremony.
The Green Cycle Engagement model transforms the traditional owner-tenant relationship into a participatory framework where stakeholders drive shared sustainability goals. By fostering a collaborative ecosystem, V city actively engages tenants, contractors, mall visitors, and the broader community in its sustainability journey, amplifying the impact of ESG initiatives and creating a model that balances environmental stewardship with social responsibility.
4.3. Transparent Communication and Public Participation
Transparent communication and public participation are central to V city’s governance approach. A range of digital platforms ensures that sustainability initiatives, performance data, and engagement opportunities are readily accessible to stakeholders. The dedicated mobile app provides easy navigation and information about mall facilities, while digital channels deliver updates on sustainability programs and achievements. Social media platforms are utilized to share success stories, promote green initiatives, and encourage community participation in recycling and energy-saving programs.
In-mall promotions and green art exhibitions serve as visible, engaging tools for public education. The installation of indoor green walls throughout the mall fosters a biophilic, inviting atmosphere while serving as a visible and ongoing testament to the commitment to sustainability. This living structure directly educates and motivates the community on environmental stewardship. The Thematic & Adaptable Atrium features modular, lightweight furniture that can be reconfigured for various events, eliminating single-use setups and allowing the space to adapt to community needs without major renovations. A high-definition LED media wall enables digital storytelling, reinforcing sustainability messages and cultural moments.
Figure 8. Installation of Green Wall
Figure 9. Thematic & Adaptable Atrium with Reconfigurable Furniture
The “Silent on Paper” digital action represents a fundamental shift toward a paperless shopping mall enabled by comprehensive digital transformation. Fully digitized internal workflows replace printed materials with interactive e-catalogs, dynamic e-posters, and ecoupons. This commitment to reducing paper waste extends to tenants and visitors, promoting a green corporate culture and encouraging the adoption of digital alternatives across the community.
5. Social Value of Human-Centric Practices
5.1. Gender Equality & Inclusive Leadership
V city demonstrates a strong commitment to gender equality and inclusive leadership throughout its operations. The facility is led by a female Facilities Manager. This leadership is supported by a commitment to gender balance across teams, ensuring diverse perspectives are integrated into decision-making processes.
The mall’s UNICEF Gold Label ‘Breastfeeding Friendly Premises’ certification highlights dedicated facilities for nursing mothers, offering privacy, comfort, and essential amenities. This certification reflects the commitment to supporting women in the workplace and as visitors. Supporting women’s entrepreneurship brands is also a priority, with the mall providing platforms for female-led businesses to showcase their products and services.
Employee well-being is promoted through initiatives such as the annual Employee Wellness Week, which features yoga classes, health seminars, and healthy food distribution. Comprehensive training programs, including specialized sustainability workshops, construction safety training, and mandatory first-aid training, equip staff with knowledge and skills. The graduate trainee program cultivates future property management leaders who are grounded in ESG-centric values, ensuring a pipeline of diverse, skilled professionals for the industry.
5.2. Workforce Safety & Equitable Transition
Ensuring workforce safety is a fundamental priority, achieved through the integration of predictive technologies and intelligent controls. The AI Confined Space Monitoring system revolutionizes worker safety with integrated wearable technology. Certified workers use camera-enabled devices that run real-time AI analytics to detect incidents such as falls or incapacitation. The system alerts control room supervisors immediately when emergencies happen, supporting rapid response and providing precise location data for rescue. Designed to comply with the revised Labour Department Code, this solution sets a new benchmark for protecting workers in high-risk environments.
Two-way intercom systems ensure continuous communication between workers in confined spaces and safety officers, enabling immediate assistance when needed. For enhanced personnel safety, security patrols are equipped with smart two-way radios featuring man-down detection. If a device remains stationary at an abnormal angle for a prolonged period, it automatically alerts the control center, ensuring immediate response to potential officer incidents.
Figure 10. AI-Powered Wearable Camera for Confined Space Worker Safety
The commitment to safety extends to all visitors. Accessible toilets are equipped with 24hour IoT fall detection sensors that automatically alert security to potential incidents for immediate response. The advanced lift flood detection system features strategically placed water sensors in lift pits that automatically trigger when a water level rises, delivering an instant signal to the central control panel. This activates an automated safety sequence, commanding the affected lift car to cease normal operation, level to the topmost floor, and open its doors to release passengers, effectively isolating it from the hazard and ensuring occupant safety while preventing equipment damage.
Figure 11. The 24-hour IoT Fall Detection Monitoring System
5.3. Universal Design and Community Safety
V city is engineered for inclusivity and safety through comprehensive universal design features. The technology-enabled barrier-free access system includes fully automated doors at footbridges and entrances. Extensive tactile paving and detailed tactile maps support intuitive navigation for visitors with mobility or visual impairments. Touchless lift call buttons equipped with tactile guidance dots meet both hygiene and accessibility standards. These allow users to summon elevators remotely, avoiding physical contact with high-touch surfaces.
Family and pet-friendly initiatives further demonstrate commitment to inclusivity. Designated pet relief zones and regular pet first aid and emergency care courses led by certified professionals ensure a welcoming environment for all visitors. The Thematic & Adaptable Atrium serves as a central community engagement space, featuring modular furniture and display fixtures that enable complete transformation for seasonal events and brand collaborations, reinforcing the mall’s role as a vibrant community hub.
5.4. Circular Economy and Community Resilience
V city’s waste management approach is based on the core principles of a circular economy, focusing on reducing waste at source and maximizing resource recovery. An extensive network of 37 recycling channels is designed to capture complex, often overlooked waste streams, such as USB cables, contact lens blister packs, and promotional materials, reliably diverting these items from landfills. This initiative is effective, as shown by results such as recycling 76,677 kilograms of plastic bottles through the Environmental Protection Department’s reverse vending machine program.
Waste reuse workshops transform discarded red envelopes and charging cables into handmade items, creating new value and reducing waste. These educational activities engage the community in circular economic principles and demonstrate practical approaches to waste reduction. Collaboration with the Hong Kong Environmental Protection Society on festive plant recycling has innovated a process that converts Christmas trees and Lunar New Year flowers into fertilizer, reducing carbon emissions by about 800 kilograms.
Community resilience is further strengthened through strategic partnerships with charitable organizations. Sponsorship of Lok Sin Tong and support for their outreach activities extends V city’s impact beyond its physical footprint, contributing to broader community and environmental goals. This multi-stakeholder approach diverts significant waste from landfill while fostering a culture of sustainability, making the mall a leader in advanced, engineering-led waste management.
5.5. Public Health and Indoor Air Quality
V city’s commitment to occupant well-being is demonstrated by its advanced Indoor Air Quality management system. Given the risks posed by airborne pathogens, an advanced IAQ management system has been installed, starting with high-performance filtration followed by real-time monitoring. Air handling units use MERV 11 filters to trap at least 85% of particles 1-3 microns in size, including dust, pollen, mold spores, and bacteria. UVC germicidal lamps in the AHU plenums bolster filtration by neutralizing microorganisms that escape the filters. Standalone HEPA-filtered air purifiers are installed in common areas, ensuring a layered approach to air purification. This ensures indoor air quality consistently meets or exceeds benchmarks, achieving “Excellent” ratings under the IAQ Certification Scheme.
The commitment to health protection extends to surface cleaning and water quality. Autonomous robotic floor scrubbers routinely sanitize high-traffic areas, eliminating pathogens and enhancing public safety. These machines work in tandem with UV-C sterilizers integrated into escalator handrails, continuously destroying bacteria and other microorganisms and disinfecting each section of the handrail multiple times per hour. Contactless elevator call buttons use infrared technology to let users summon elevators remotely, avoiding physical contact with shared high-touch surfaces.
The “Quality Water Scheme for Buildings - Fresh Water (Management Scheme) (Gold)” award from the Water Supplies Department confirms a complete water safety plan that includes regular flushing, water checks, and active upkeep of pipes, ensuring safe, clean water throughout the building. This comprehensive health protection program, combining advanced air and surface disinfection with strict water quality management, establishes a new benchmark for healthy building operations.
6. Energy Performance Analytics & Verification
V city’s energy-saving philosophy is rooted in a holistic, systems-based approach that minimizes energy consumption without compromising occupant comfort or commercial functionality. This comprehensive strategy supports the energy conservation target of a 40% reduction in energy consumption by 2025, compared to a 2014 baseline. As of last year, a 39.42% reduction had been attained. Energy Usage Intensity achieved 155.54, verified by a comprehensive energy audit, placing V city in the top 10% of energy-efficient buildings in Hong Kong. Annual energy consumption data from 2014 to 2024 demonstrates a consistent downward trend, validating the effectiveness of layered engineering interventions.
The most significant energy savings were achieved by optimizing the MVAC system, the building’s largest energy-consuming load. The AI-powered, cloud-based chiller optimization system analyzes real-time data, recommending and implementing the most efficient operating sequences and load patterns. Since its commissioning in 2021, this system has reduced chiller energy use by 1,050,000 kWh cumulatively. The phased replacement of outdated chillers with high-efficiency variable speed drive centrifugal chillers has delivered a 60.2% improvement in part load efficiency compared to the old units. The new chillers utilize ultra-low GWP refrigerants such as R-514A, further reducing direct greenhouse gas emissions. Intelligent control is extended network-wide using IoT sensors that automate adjustments, enabling optimal start/stop of air handling units, demand-based ventilation from real-time CO₂ levels, and ongoing system setpoint recommissioning. Replacement of traditional fans with high-efficiency Electrically Commutated plug fans in air handling applications has saved an estimated 345,000 kWh.
The building-wide LED retrofit replaced outdated fluorescent and halogen lamps with dimmable, high-lumen LEDs. Quantified results show savings of approximately 67,281 kWh annually for advertising signage, 45,000 kWh for dining area lighting, and 47,955 kWh for downlights. The retrofit of 990 main arcade downlights cut power per fixture from 33 to 22 watts. An IoT lighting control system with connected lux sensors in open areas, the atrium, and other spaces automatically adjusts lighting to ensure lights are on only as needed, and at the proper intensity. Combined annual savings from lighting measures total approximately 160,000 kWh. The building envelope was improved through the application of solar films to existing glazing, reducing solar heat gain and saving an estimated 18,180 kWh of electricity annually. Dual-speed escalators that operate at full speed during peak hours and automatically switch to reduced speed during periods of low footfall contribute additional energy savings.
On-site renewable energy generation further contributes to carbon reduction. A 10kilowatt solar energy system deployed on the roof of footbridge No. 6 has generated over 44,000 kWh of renewable electricity since its commissioning in April 2020, leading to a reduction of 20,900 kg of CO₂ emissions. Additionally, a water-powered generation system installed on the saltwater tank and cooling tower make-up water tank produces approximately 20,000 kWh of renewable electricity annually.
The energy savings reported are supported by rigorous calculation methods and data verification. Lighting Power Density calculations for each zone were verified against the Building Energy Code (Chapter 610) requirements, with final designs achieving densities of 3 W/m² for car park, 6 W/m² for corridors, and 8.4 W/m² for machine room areas. All emergency lighting designs strictly follow Fire Services Department Cap. 502 Fire Safety (Commercial Premises) Ordinance, meeting the minimum requirement of 2 lux horizontal illuminance at floor level. For the AI chiller optimization system, energy savings are derived from pre- and post-implementation performance data, with the system achieving a 60.2% improvement in part load efficiency validated by equipment performance testing. All energy data is cross verified against utility bills and Building Management System readings, with HKGBC auditors confirming BEAM Plus EB V2.0 performance metrics and CLP emission factors applied for carbon emissions calculations.
Financial analysis confirms the cost-effectiveness of these measures. The AI-powered Chiller Plant Optimization Energy Management System was fully funded by a HKD 198,000 grant from the CLP ECO Building Fund, resulting in a zero-payback period and generating HKD 1,490,757 in energy savings from 2021 to 2025. The comprehensive LED retrofit has a projected material investment of HKD 141,808 with anticipated annual cost savings of nearly HKD 80,000, resulting in a payback period of 1.78 years.
7. Long-Term Future Planning & Sustainable Evolution
7.1. Alignment with Policy Objectives
V city’s sustainability strategy is fully aligned with Hong Kong’s Climate Action Blueprint 2050, proactively advancing ESG goals through innovative smart technology and sustainable practices. The mall’s energy reduction target of 40% by 2025 from a 2014 baseline directly supports the city’s decarbonization objectives. The transition to low GWP refrigerants such as R-514A aligns with international agreements including the Kigali Amendment to the Montreal Protocol, ensuring long-term compliance and staying ahead of regulatory phase-outs of high-GWP refrigerants.
Compliance with the Building Energy Efficiency Ordinance is demonstrated through continuous energy performance improvements and the achievement of top 10% energy efficiency ranking among similar properties. The BEAM Plus EB V2.0 certification confirms that the building meets rigorous environmental performance standards. The scalable EV charging infrastructure, with dedicated capacity for expansion, ensures the building can meet evolving government policies and increased EV adoption.
7.2. Continuous Improvement Mechanism
A robust continuous improvement mechanism ensures that V city maintains and enhances its sustainability performance over time. The cross-functional Green Team, bringing together leaders from leasing, technical services, marketing, and finance, meets regularly to monitor progress toward ESG targets, address challenges, and ensure alignment across all departments. Publicly declared 2025 goals provide transparent objectives that unify all projects and clarify each team member’s contribution.
ESG performance metrics are formally embedded into the company-wide staff appraisal process through the Kai Shing e-Appraisal system, ensuring that sustainability remains a core priority in individual performance evaluations. This creates strong incentives for continuous improvement and innovation.
A rolling equipment upgrade plan ensures that building systems are regularly assessed and upgraded to incorporate the latest efficient technologies. The phased replacement of chillers with high-efficiency variable speed drive units, the ongoing expansion of renewable energy generation capacity, and the systematic LED retrofit program demonstrate this commitment to continuous technological evolution.
Several new initiatives are currently underway to further advance sustainability performance. The LED lighting retrofit project represents a comprehensive upgrade across multiple zones within V city. The scope includes the first-floor corridor where motionsensor lights installed 10 years ago have reached the end of their service life and require replacement, the second-floor cooling tower where lights currently always remain on, and the third-floor car park where continuous high-power operation occurs even when unoccupied. The technical solution involves zone-specific fixture selection: 167 linear fixtures for the corridor including standard and emergency lighting, 127 waterproof IP65rated emergency-rated linear fixtures for the cooling tower area to withstand the harsh environment, and 161 linear fixtures for the car park. A systematic approach has been developed for each zone, with occupancy sensors enabling dimming and full brightness activation in corridors, breathing sensors in the cooling tower to detect stationary workers, and a smart schedule with motion-activated localized boost in the car park. A pilot testing phase is planned to validate design assumptions before full installation, evaluating parameters including light levels, power consumption, sensor sensitivity, activation time, and cascading performance. The projected material investment is HKD 141,808 with anticipated annual cost savings of nearly HKD 80,000, resulting in a payback period of 1.78 years.
In addition, V city has partnered with Green Vigor Limited, a startup company, to install a water-powered generation system on the water storage tanks. This system generates electricity when water is pumped into various storage tanks, driving turbines in the process. The technology is currently installed on the saltwater tank and cooling tower make-up water tank, with an estimated combined annual electricity generation of approximately 20,000 kWh, equivalent to the monthly electricity consumption of 67 typical households. The system features an open design that does not affect the mall’s water supply even during system suspension or maintenance. The facilities management team can log into an online system to monitor electricity generation data, making output estimation more predictable compared to solar or wind energy. This collaboration not only helps reduce the mall’s electricity consumption but also supports the startup by providing data collection and testing to continuously improve generation efficiency. These new explorations, while still being refined, represent important steps in driving the community toward sustainable development and demonstrate the mall’s commitment to exploring diverse possibilities for enhancing operational efficiency.
8. Scope of Influences
V City achieved 39.42% energy savings and an energy intensity of 155.54 (top 10% of similar buildings in Hong Kong) by constructing a "cloud-based self-learning energy efficiency network," integrating AI-powered chiller optimization, comprehensive LED retrofitting, solar photovoltaic power generation, and hydropower generation technologies. The AI system accumulated 1.05 million kWh of electricity savings and received full funding from the CLP ECO Fund, achieving zero payback period. These results demonstrate that even in high-density commercial environments, significant energy conservation and carbon reduction benefits can be achieved through smart technology and engineering innovation.
At the management and control level, the project established a cross-departmental green team, formally incorporated ESG performance into the employee performance evaluation system and formed a closed-loop governance framework from tenants to operations through green renovation policies (85% waste diversion), smart procurement policies, and an RFID spare parts management system. This institutionalized management model ensures the continuous advancement and accountability of sustainability goals.
In terms of cross-sectoral impact, this project transforms the shopping mall into a diverse social platform: AI-powered enclosed space monitoring, elevator flood prevention systems, and the "Angel Box" missing persons location program enhance community safety; UV-C disinfection, HEPA filtration, and superior indoor air quality set a public health benchmark; AI-powered thermal imaging-monitored EV charging networks and bicycle parking promote low-carbon travel; and female facilities manager leadership, the UNICEF Gold Label for Breastfeeding, and a 37-category recycling program demonstrate the social value of gender equality and the circular economy.
V City's model has received multiple certifications, including BEAM Plus Excellence and the HKIE Award for Building Excellence. All technologies meet international standards and feature modular design, making them replicable in other APEC economies' shopping malls, office buildings, or hotels. This project demonstrates that a shopping mall can not only serve as an energy-saving benchmark but also promote community safety, public health, and social inclusion through rigorous management and control.
Estimated Savings
Savings Narrative
V city ‘s low energy building network has achieved multiple verified energy efficiency measures, including the AI-powered chiller plant optimization system, completed LED lighting retrofit, highefficiency EC plug fans, building envelope solar film, and the on-site solar photovoltaic system. Annual savings are based on post-implementation measurement, utility bill analysis, and BMS data, cross-verified by third-party energy audits. The LED retrofit for the cooling tower and car park, as well as the water-powered generation system, are planned and are not included in the current achieved savings.
Kilowatt-hours Savings per year:
• AI chiller optimization: 210,000 kWh
• LED lighting retrofit: 168,000 kWh
• EC plug fans: 345,000 kWh
• Solar film: 18,000 kWh
• Solar PV: 8,000 kWh
Total achieved: 741,180 kWh/year
Future Projected Savings per year (not included in current total):
• LED lighting retrofit (corridor, cooling tower and carpark): estimated 55,393 kWh
• Water-powered generation system: estimated 20,000 kWh
Net Operating Cost Savings per year:
741,180 kWh/year x HKD 1.45 x 0.1276 = 137133 USD
Carbon Emissions Offset:
741,180 kWh/year x 0.37 /1000 = 274.24 Metric tons CO2 per year