Our client is a large office building located in the city center with numerous tenants and a huge daily demand for air conditioning. Since cooling towers and chillers are the core of the building’s central air conditioning system, lack of maintenance not only leads to a significant drop in energy efficiency but also poses a risk of Legionnaires’ disease, threatening tenant health and the building’s reputation. Therefore, we provided a comprehensive periodic maintenance program covering monthly inspections, quarterly cleaning, and annual deep chemical cleaning and testing.
Key tasks include:
- System maintenance and repair – Monthly checks of cooling tower and chiller operation, monitoring water quality, flow rate, and differential pressure, and correcting any deviations promptly.
- Periodic maintenance – Quarterly cleaning of cooling tower filters and condensate pans, performing sterilization and chemical treatment to reduce the risk of bacterial growth.
- Cleaning of the air conditioning system and numerous individual units – Regularly cleaning condensers and evaporators using high-pressure water jets and specialized chemicals to improve heat exchange efficiency.
- Repair work and parts replacement – Regularly inspecting pumps, motors, belts, and bearings, replacing worn parts proactively to prevent unexpected downtime.
Through these measures, we successfully helped our client improve system efficiency, reduce electricity bills, and avoid the risk of Legionnaires’ disease. In particular, after the annual deep cleaning, the temperature difference between the chiller’s inlet and outlet returned to the design value, resulting in a reduction in energy consumption of approximately 15%. The property management team was also very satisfied, as tenants experienced improvements in both user experience and health and safety.
This case demonstrates our one-stop maintenance capabilities, providing compliant and consistently reliable services from cleaning and chemical dosing to testing and repair.
Results Summary:
- Effectively reduced the risk of Legionnaires’ disease, complying with Hong Kong health guidelines.
- Improved system energy efficiency, resulting in a 10-15% reduction in electricity costs.
- Cooling towers and chillers operated stably, reducing unexpected maintenance needs.
- Enhanced tenant confidence and satisfaction with property management.
Customer Feedback:
“We are very satisfied with the service; air conditioning issues were almost always resolved immediately. This allows us to focus on our retail business without worrying about air conditioning malfunctions affecting the customer experience.”