CW Tower, a premier office building on Ratchadapisek Road renowned for its longstanding commitment to sustainability and environmental stewardship, announces a major milestone: achieving LEED Platinum certification in the Operation & Maintenance (O+M) category. Awarded by the U.S. Green Building Council, this highest level of green building certification reinforces the tower’s dedication to tangible results. Through the integration of energy management technologies and continuous environmental initiatives, CW Tower continues to advance toward its ultimate goal of Net Zero emissions.
Mr. Pongsak Nantawannakul, Managing Director of CW Towers Co.,Ltd. stated that this achievement stems from a core conviction that modern office buildings must take tangible responsibility for the environment. Consequently, the building has been developed across all dimensions—energy, environment, and the well-being of its occupants—by systematically integrating innovations and energy-efficient systems to elevate building performance to international green standards. Under this sustainability policy, CW Tower has continuously implemented various upgrades and enhancements, including:
· Comprehensive Waste Management: Implementing rigorous waste management initiatives through the ‘Perks from Trash’ and ‘CW Eco Bloom’ projects. These programs ensure the continuous recycling of materials, reduce landfill waste, and provide tangible support for a circular economy. Furthermore, the impact is extended to the community by processing organic waste into plant nutrients (organic vitamins), which are distributed to the public free of charge.
· High-Efficiency Energy Systems: The integration of cutting-edge technologies, such as the ONNEX Air Scrubber system and Haier’s Water-Cooled Magnetic Bearing Air Chiller, significantly reduces energy consumption within the HVAC and cooling systems. As a result, the building’s energy efficiency consistently exceeds standard benchmarks, leading to a year-on-year reduction in carbon emissions. Furthermore, the building supports clean energy initiatives by installing solar panels to provide lighting for the surrounding community.
- Water Efficiency and Optimization: Implementing water management systems that regulate consumption to appropriate levels, minimizing resource waste, and ensuring that water usage is both highly efficient and sustainable.
- Enhanced Indoor Air Quality: Utilizing the ONNEX Air Scrubber and international-standard ventilation systems, the building maintains concentrations of CO₂, TVOCs, and fine particulate matter (PM) significantly below standard safety thresholds. This ensures a clean, safe, and optimal environment for long-term productivity. Furthermore, CW Tower is the first office building in Thailand to install UV-C Clean Car technology to disinfect elevator surfaces without leaving residues, alongside UV-C Clean Air systems that continuously purify the air while in use. These systems effectively eliminate airborne viruses and odors, ensuring a safe and contaminant-free environment for all occupants.
- Eco-Friendly Commuting: Situated in a location that offers seamless connectivity to public transportation, the building prioritizes clean energy and zero-emission travel. CW Tower provides a comprehensive range of facilities, including EV Charging Stations for electric vehicles, a dedicated Bike Hub, and Park & Ride areas to ensure maximum convenience for all building occupants and commuters.
Our continuous development—from achieving LEED Gold to ascending to LEED Platinum this year—marks another significant milestone. It reflects CW Tower’s steadfast commitment to advancing toward our Net Zero goals with clarity and sustainability,” Mr. Pongsak. said
The success behind CW Tower’s achievement of international green building standards is rooted in a dedicated, multifaceted approach to building management. By integrating modern technology with operational efficiency, the concept of sustainability has been transformed into tangible results. A key factor in this achievement is the collaboration with leading technology partners, including the implementation of the ONNEX Air Scrubber and Haier’s Air Chiller systems. These innovations have significantly elevated the building’s efficiency, reduced energy consumption, and substantially lowered carbon dioxide emissions.”
In conjunction with this milestone, Mrs. Upassri Bamrungwong, Business Development and Marketing Director of Nexter Living Co.,Ltd. and the sole importer of ONNEX Air Scrubber technology in Southeast Asia—expressed her pride in partnering with CW Tower. Congratulating the tower on achieving LEED Platinum certification, she noted that the installation of the ONNEX Air Scrubber—an innovation capable of directly capturing CO₂ and volatile organic compounds (VOCs) from within the building—enables high-efficiency air treatment. This significantly reduces the volume of outdoor ‘fresh air’ required, thereby lowering the cooling load on the HVAC system and saving energy. Furthermore, it elevates indoor air quality to meet the internationally recognized IAQP (Indoor Air Quality Procedure) standards. This technology addresses both occupant well-being and energy reduction, serving as a primary factor in CW Tower’s Platinum certification. Notably, CW Tower is the first office building in Thailand to officially implement the ONNEX Air Scrubber system.
Mr. Dong Jianping, President of Haier Electrical Appliances (Thailand) Co., Ltd., added—in his dual capacity as both a technology partner and a building tenant—that he is honored by the trust CW Tower has placed in Haier to manage the Air Chiller system. A critical factor in enhancing building efficiency was the transition to Haier’s Water-Cooled Magnetic Bearing Chiller. This oil-free technology, featuring a magnetic bearing and centrifugal compressor, is distinguished by its high efficiency and low energy requirement even under low-load conditions with low starting current and superior overall performance. Additionally, the system is environmentally friendly as it operates without fuel or oil lubricants. Since the installation, the building has achieved energy savings of approximately 30% per year, reducing carbon dioxide emissions by roughly 1,130 tons (TONCO2E/Y). Mr. Dong emphasized Haier’s long-standing commitment to environmental preservation and noted that, as a tenant, he takes great pride in having an office in a building that truly prioritizes sustainability. He concluded that the LEED Platinum certification is a testament to the tower’s unwavering dedication, and Haier looks forward to future collaborations on further eco-friendly initiatives with CW Tower
This achievement marks a significant step forward for CW Tower, highlighting a steadfast commitment to environmental stewardship. By integrating sustainable technologies and innovations across every dimension—from energy efficiency and smart building management to enhancing the well-being of its occupants—the building has successfully reduced energy consumption, lowered carbon emissions, and created a cleaner, safer indoor environment. These efforts solidify CW Tower’s position as a ‘Model Green Building,’ advancing toward the Net Zero goal with a commitment to long-term stability.