Toyota Motor Corporation Head Office

Last Uploaded: February, 2010


Mirror duct cross section

Special Features

Q-1 Indoor Environment	Non-draft air-conditioning method using all-floor convection Task and ambient air-conditioning using personal blower outlets External air volume control using co₂ concentration detector Improvement of air quality by dividing off smoking areas Use of mirror duct to collect light in underground staff canteen
Q-2 Quality of Service	Office productivity improved by the "vertical village" concept Ceiling height 2.8m, floor height 4.1m Earthquake-proof reliability assured by seismic-isolation structure Optimal maintenance design and installation of equipment using 3D-CAD
Q-3 Outdoor Environment on Site	Green roof Car park designed to blend with landscape Correlation between interior and exterior maintained by the use of a sunken garden
LR-1 Energy	Use of hi-tech curtain wall (low-ε double glazing + horizontal vertical louvers + push-pull air barrier + gradation blinds) Natural ventilation system by the stack effect of the vertical village Task and ambient air-conditioning using the all-floor convection method Use of cogeneration using exhaust gas injection water cooler and heater External air cooler system Reduction of conveyance power by using the VAV / VWV system
LR-2 Resources and Materials	Use of water-saving sanitary appliances Use of rainwater as a gray water source Use of wooden water receptacle tanks New gas fire extinguishing system (nitrogen gas extinguishers)
LR-3 Off-site Environment	Mitigation of heat island phenomenon by using green roofs and planting site greenery Rainwater utilization along with infiltration of rainwater Thermal discharge and air exhaust from the rooftop

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).