Retrofit

Building Owner

China Resources Longdation Co., Ltd.

Application of multi-skin façade system

Replacement of façade system

Building/Project Name

China Resources Building

Systems

Curtain Wall and skylight System

Building Types

Commercial - Office

Description of the building:
A revitalization project to transform the original 50-storey building in Wan Chai North since 1983 into a contemporary building:

To give the corporate headquarter a new international image,
To create a more comfortable and convenient environment in harmony with the neighbourhood, and
To integrate with the redevelopment of Harbour Road Garden, the Causeway Centre podium and the public passage linking buildings in the area.

Retrofitted initiative:

Renovation strategy was to have the building remained occupied during construction.
Low noise demolition methods were also adopted.
High performance façade system was adopted:

- The existing façade of white tiles and red stone cladding was renovated by adding a new curtain wall using robust construction materials like glass panels, aluminium and stainless steel claddings for easy future maintenance.

- This semi-unitized curtain wall system with pressure equalized system and drain gutter at each floor facilitated ease of construction by allowing random installation sequence, and flexibility to minimize disturbance to the tenants and to allow special events during construction.

- Low-e glass panels help reduce the solar heat gain to the interior office space and reduce energy use.

- The retrofit achieved a 33% reduction in OTTV, from 20.39 W/m2 to 13.66 W/m2.

Use of tower working platforms for curtain wall installation

Observed benefits other than energy saving:
Reuse the existing structural frame to reduce construction waste and the demand of resources:

Saving 13,000m³ of water per year = filling of 5 Olympic pools
Recycling 1,600 tons of waste during construction.

Use of Tower Working Platform instead of scaffold to allow external view, natural light penetration and minimize disturbance to tenants.

Enhanced building permeability at podium level.

Use Low-VOC materials for renovated spaces.

Installed innovative and high-efficient LED lighting equipment. It transforms the building appearance and enhances its presence at nighttime.

General observations of the retrofitting project:
Optimises daylight and energy consumption by using a glazing system.

Low-e Laminated Glass to Reduce Solar Heat Gain. Thus, reduced the building operating cost with reduced heat gain.

Allows only 5% of solar energy to be transmitted indoors. Naturally reducing interior temperature.

The air-tightness of the façade reduces the need for air-conditioning and
improve indoor air quality.

Together with other major MEP retrofitting improvement, such as renovation of the AHU fan type, installing CO2 Demand Control Ventilation System and the subsequent Energy-cum-Carbon Audit and Post-evaluation revealed that :

Reduction of 1,950 tons CO2 p.a. as compared with ASHRAE Baseline = annual CO2 absorption approx. 280,000 pine trees
Energy consumption savings of 2.35 GWh p.a. compared with ASHRAE Baseline.

Other information:

Cost		Saving
Total cost:	Approx. $447 million	Total savings/year:	According to energy/ carbon audit, electricity in 2013 was reduced by 9.3%, compared to 2008 baseline
Awards
Awards received by the project:	• 1st building renovation project to receive a LEED Core & Shell Gold recognition in Hong Kong • 2015 FuturArc Green Leadership Award – Merit Award (Commercial Category) • 2014 MIPIM Asia Awards – Bronze Winner (Best Office and Business Development) • 2014 Chivas 18 Architecture and Design Awards – Commercial and Mixed-use Building: Hong Kong • 2014 Quality Building Award – Grand Award (Hong Kong Building [Renovation/Revitalization] Category) • 2013 The Hong Kong Institute of Architects Annual Awards – Merit Award of Hong Kong • 2013 Perspective Awards – Excellence (Architecture (Professional) Commercial, Retail or Office) • 2013 Meiju Award – The Most Beautiful Commercial Property • 2012 The American Institute of Architects Hong Kong Chapter Honors and Awards – Sustainable Design Award for Architecture • 2012 Green Building Award – Finalist (Existing Building category [Completed Building] - Hong Kong)

Application of multi-skin façade system

Replacement of façade system

Building Owner

China Resources Longdation Co., Ltd.

Building/Project Name

China Resources Building

Systems

Curtain Wall and skylight System

Building Types

Commercial - Office

Description of the building:

A revitalization project to transform the original 50-storey building in Wan Chai North since 1983 into a contemporary building:

To give the corporate headquarter a new international image,
To create a more comfortable and convenient environment in harmony with the neighbourhood, and
To integrate with the redevelopment of Harbour Road Garden, the Causeway Centre podium and the public passage linking buildings in the area.

Retrofitted initiative:

Renovation strategy was to have the building remained occupied during construction.
Low noise demolition methods were also adopted.
High performance façade system was adopted:

Observed benefits other than energy saving:

Reuse the existing structural frame to reduce construction waste and the demand of resources:

Saving 13,000m³ of water per year = filling of 5 Olympic pools
Recycling 1,600 tons of waste during construction.

Use of Tower Working Platform instead of scaffold to allow external view, natural light penetration and minimize disturbance to tenants.

Enhanced building permeability at podium level.

Use Low-VOC materials for renovated spaces.

Installed innovative and high-efficient LED lighting equipment. It transforms the building appearance and enhances its presence at nighttime.

General observations of the retrofitting project:

Optimises daylight and energy consumption by using a glazing system.

Low-e Laminated Glass to Reduce Solar Heat Gain. Thus, reduced the building operating cost with reduced heat gain.

Allows only 5% of solar energy to be transmitted indoors. Naturally reducing interior temperature.

The air-tightness of the façade reduces the need for air-conditioning and
improve indoor air quality.

Together with other major MEP retrofitting improvement, such as renovation of the AHU fan type, installing CO2 Demand Control Ventilation System and the subsequent Energy-cum-Carbon Audit and Post-evaluation revealed that :

Reduction of 1,950 tons CO2 p.a. as compared with ASHRAE Baseline = annual CO2 absorption approx. 280,000 pine trees
Energy consumption savings of 2.35 GWh p.a. compared with ASHRAE Baseline.

Other information:

Cost		Saving
Total cost:	Approx. $447 million	Total savings/year:	According to energy/ carbon audit, electricity in 2013 was reduced by 9.3%, compared to 2008 baseline
Awards
Awards received by the project:	• 1st building renovation project to receive a LEED Core & Shell Gold recognition in Hong Kong • 2015 FuturArc Green Leadership Award – Merit Award (Commercial Category) • 2014 MIPIM Asia Awards – Bronze Winner (Best Office and Business Development) • 2014 Chivas 18 Architecture and Design Awards – Commercial and Mixed-use Building: Hong Kong • 2014 Quality Building Award – Grand Award (Hong Kong Building [Renovation/Revitalization] Category) • 2013 The Hong Kong Institute of Architects Annual Awards – Merit Award of Hong Kong • 2013 Perspective Awards – Excellence (Architecture (Professional) Commercial, Retail or Office) • 2013 Meiju Award – The Most Beautiful Commercial Property • 2012 The American Institute of Architects Hong Kong Chapter Honors and Awards – Sustainable Design Award for Architecture • 2012 Green Building Award – Finalist (Existing Building category [Completed Building] - Hong Kong)

Application of multi-skin façade system

Replacement of façade system