Retrofit

Building Owner

Hongkong Land Limited

Application of vertical green wall and green roof

Renewable energy integrated with roof / green roof

Building/Project Name

Exchange Square

Systems

Opaque Wall and Roof System

Building Types

Commercial - Office

Description of the building:
Exchange Square is a major development that sets the benchmark in Hong Kong for a prestigious, globally oriented, 24-hour business complex. It is home to many leading international investment banks and financial institutions.

One, Two and Three Exchange Square (52, 51 and 33 storeys respectively) was completed in 1985 - 1988 and the Forum was redeveloped as a 5 storeys office building in 2013

The public plaza at Exchange Square, seamlessly integrated with the office buildings, offers a captivating open space with greeneries, fountains, and an impressive collection of renowned sculptures.

Retrofitted initiative:

Refurbish the rooftop of office buildings by photovoltaic installation (Flexible Photovoltaic and Cadmium Telluride Photovoltaic)
Install green roof on the footbridges

Observed benefits other than energy saving:

Photovoltaic system in Exchange Square with smart grid compatibility to support the decarbonization of Hong Kong.
Reduce the heat transfer from roof top for better thermal comfort and reduce heat load.
Ultra light-weight green roof to reduce urban heat island effect and benefit to the surrounding environment and neighborhood.

General observations of the retrofitting project:
One effective way to enhance the energy efficiency of buildings is through installation of photovoltaic system on the rooftop. This refurbishment not only reduces heat transfer from the roof, at the same time it could enhance the overall aesthetic of the roof / equipment. Additionally, the generated power from the photovoltaic system can offset the carbon emissions of the building, contributing to a greener environment, or generate profit through the feed-in tariff scheme.

Another eco-friendly initiative was the implementation of a 450sqm ultra-lightweight green roof on the footbridge and the roof of podium. This retrofit not only helps combat the urban heat island effect which reduces the overall temperature of the surrounding area, it also serves the purpose of biophilia for tenants of nearby buildings, enhancing the overall sustainability and wellness for our occupants and surrounding area.

Other information:

Cost		Saving
Total cost:	HKD 4 million (PV Installation Only)	Total savings/year:	HKD 100,000 (by REC)
Awards
Awards received by the project:	• Pioneer Award in GREEN BUILDING LEADERSHIP CATEGORY: Facilities Management under Green Building Award 2023 • Platinum rating in HK BEAM Plus Certification for Existing Buildings • Grand Award in Facilities Management under Green Building Award 2019 • Distinction Award (Large Organization Category) of the Hong Kong Sustainability Award 2023 • 2022 Wise Save @ RCx Bronze Award • Energy Saving Championship Scheme 2019 Outstanding RCx (Implementation) Award • IFMA Asia Pacific Awards of Excellence 2022-2023 in Environmental Stewardship Award, Certificate of Excellence • The Excellent Building Award 2023, Year of Excellent Award (Existing Building)

Application of vertical green wall and green roof

Renewable energy integrated with roof / green roof

Building Owner

Hongkong Land Limited

Building/Project Name

Exchange Square

Systems

Opaque Wall and Roof System

Building Types

Commercial - Office

Description of the building:

Exchange Square is a major development that sets the benchmark in Hong Kong for a prestigious, globally oriented, 24-hour business complex. It is home to many leading international investment banks and financial institutions.

One, Two and Three Exchange Square (52, 51 and 33 storeys respectively) was completed in 1985 - 1988 and the Forum was redeveloped as a 5 storeys office building in 2013

The public plaza at Exchange Square, seamlessly integrated with the office buildings, offers a captivating open space with greeneries, fountains, and an impressive collection of renowned sculptures.

Retrofitted initiative:

Refurbish the rooftop of office buildings by photovoltaic installation (Flexible Photovoltaic and Cadmium Telluride Photovoltaic)
Install green roof on the footbridges

Observed benefits other than energy saving:

Photovoltaic system in Exchange Square with smart grid compatibility to support the decarbonization of Hong Kong.
Reduce the heat transfer from roof top for better thermal comfort and reduce heat load.
Ultra light-weight green roof to reduce urban heat island effect and benefit to the surrounding environment and neighborhood.

General observations of the retrofitting project:

One effective way to enhance the energy efficiency of buildings is through installation of photovoltaic system on the rooftop. This refurbishment not only reduces heat transfer from the roof, at the same time it could enhance the overall aesthetic of the roof / equipment. Additionally, the generated power from the photovoltaic system can offset the carbon emissions of the building, contributing to a greener environment, or generate profit through the feed-in tariff scheme.

Another eco-friendly initiative was the implementation of a 450sqm ultra-lightweight green roof on the footbridge and the roof of podium. This retrofit not only helps combat the urban heat island effect which reduces the overall temperature of the surrounding area, it also serves the purpose of biophilia for tenants of nearby buildings, enhancing the overall sustainability and wellness for our occupants and surrounding area.
Other information:

Cost		Saving
Total cost:	HKD 4 million (PV Installation Only)	Total savings/year:	HKD 100,000 (by REC)
Awards
Awards received by the project:	• Pioneer Award in GREEN BUILDING LEADERSHIP CATEGORY: Facilities Management under Green Building Award 2023 • Platinum rating in HK BEAM Plus Certification for Existing Buildings • Grand Award in Facilities Management under Green Building Award 2019 • Distinction Award (Large Organization Category) of the Hong Kong Sustainability Award 2023 • 2022 Wise Save @ RCx Bronze Award • Energy Saving Championship Scheme 2019 Outstanding RCx (Implementation) Award • IFMA Asia Pacific Awards of Excellence 2022-2023 in Environmental Stewardship Award, Certificate of Excellence • The Excellent Building Award 2023, Year of Excellent Award (Existing Building)

Application of vertical green wall and green roof

Renewable energy integrated with roof / green roof