Last Uploaded: December, 2009

Panasonic Electric Works Tokyo Headquarters building

Architectural DataFeaturesCasbee ScoreTechnical Details建物リストに戻る
Bird's-eye view of site
Bird's-eye view of site Bird's-eye view of building Plot plan of building Cross sectional configuration drawing of building
Architectural considerations for environment Equipment-related considerations for environment Photovoltaic power generation system installed on roof Garden greening on roof of top floor

Special Features

Q-1 Indoor Environment
  • Low-e glass is used for all faces
  • West-side two-layered open ceiling: Blind control air flow windows
  • East side: Blind control and air flow close to the window
  • Individual control by area control when nobody is present
  • Natural ventilation system
  • Natural daylighting system
  • Outdoor air intake: 30 m³/h/person
Q-2 Quality of Service
  • OA floor: 150 mm
  • Power supply capacity: 60 VA/m²
  • Ceiling height: 2.8 m
  • Story height: 4.25 m
  • Modular design (easy partition)
  • Outdoor air cooling system
  • Earthquake resistance level: 1.5 times the level required by the Building Standard Law
  • Damper
  • District cooling and heating system (highly reliable)
  • District grey-water system
  • Collected drainage treatment facility
Q-3 Outdoor Environment on Site
  • Roof greening
  • Townscape coordination of the entire redeveloped block
  • Restored station house within the same block (preserving historical buildings)
LR-1 Energy
  • PAL value: 283.6 MJ/m²/year
    CEC/AC: 1.36, CEC/V: 0.84, CEC/L: 0.63, CEC/EV: 0.56
  • Energy saving target: Approx. 20% higher than general buildings (2,115 MJ/m²/year)
  • Natural daylighting, natural ventilation, and photovoltaic power generation systems were installed
  • Conservation of energy at the operation stage: Metering of each air conditioning system and detailed metering of power consumption by power units, lighting, and outlets in each zone
  • A dispersed type BEMS is installed
  • Commissioning (performance verification) was conducted by the owner, the facility supervisor, the designer, and the constructor at the operation stage
LR-2 Resources and Materials
  • Water reclaimed by local infrastructure is used
  • Collected drainage treatment facility
  • Toilet flushing sound simulator and water-saving toilet bowls are used
  • Kitchen garbage is composted
  • CFC-free fire extinguishers
  • Individual air conditioning system by using non-CFC refrigerant
  • Wooden materials are used for a wood deck, etc.
LR-3 Off-site Environment
  • The heat island effect resulting from the use of local air conditioning is prevented
  • Air pollution resulting from non-combustion appliances is prevented (hot water is supplied to kitchens by night storage type water heaters)
  • Roof greening, wood deck and greening on the 24th floor
  • West side lighting that takes into consideration light pollution in order to avoid disturbing neighboring buildings
  • Noise and vibration-producing appliances are installed underground or measures to reduce noise are taken

Other Features

Outside air cooling system
Lighting/air conditioning/blind cooperative control system

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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).