Marunouchi Building

Last Uploaded: July, 2008


Exterior with canopies using mullions

Special Features

Q-1 Indoor Environment	Sunlight screening effect caused by mullions and improved heat insulation due to double glazing Improved perimeter heat environment due to air barriers VAV control for each span Illuminance control using daylight sensors External air cooler control (maximum external air intake: 2.5 times normal volume)
Q-2 Quality of Service	Office ceiling height 2.8m, floor height 4.2m Ample views ensured, free layout of office space Semi-public space with 3-floor atrium Improved aseismic properties due to unique anti-vibration studs Equipment design plans taking account of equipment redundancy and renewal (replacement space, duplication of piping, renewal space) Improved reliability during disasters due to use of permanent power generator
Q-3 Outdoor Environment on Site	Rooftop greenery External structure enhances amenity through combined consideration of road at front History of the old Marunouchi Building preserved, architectural art gallery
LR-1 Energy	Exterior plans reduce perimeter load, sun heat load reduced using a localized heat exhaust system Natural energy usage due to humidifying-cooling external air coolers and use of daylight High-efficiency deployment of cold heat using high-efficiency heat source equipment and OPS (operation service) Large temperature differential water conveyance and VWV system Primary energy reduction due to cogeneration
LR-2 Resources and Materials	Use of water conserving appliances Recycling of rainwater and gray water Reuse of demolition waste from the old Marunouchi Building Zero-emissions activity
LR-3 Off-site Environment	Deodorizing of kitchen exhaust fumes Forecasting and measures to reduce wind damage Reduced sewerage load by decreasing rainwater runoff and reusing kitchen wastewater

Other Features

N/A

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These cases are described based on assessment results obtained using CASBEE.
CASBEE is a method for rating the environmental performance of buildings using Building Environmental Efficiency (BEE) as an indicator, which is based on the results of separate scores obtained for Q-1~Q-3 (Quality) and LR-1~LR-3 (Load Reduction).