Honda Wako Building

Last Uploaded: January, 2010


North-south open ceiling and glass curtain wall

Special Features

Q-1 Indoor Environment	Working space in a bright, thermally stable environment created by distributed arrangement of atriums and top lights (56 m x 12 m) Perimeter-less working space with atriums, machine rooms, lavatory, staircases, and more installed circumferential area Double-skin system using low-e glass for openings and aluminum vertical louvers on the eastern and western exterior walls, especially the western one to protect against sunlight from the west Automatically controlled (by sunlight tracking, illuminance sensors) blinds and roll screens Air conditioning is possible around personal desks by segmented air conditioning (VAV) after regular business hours Appliances with category V louver (working space) Lighting control by human and illuminance sensors and remote-controllable lighting by sensor The ventilation amount is 1.2 times the ventilation standard. Interior finishing materials easy to clean and maintain A smoking area is available on each floor.
Q-2 Quality of Service	Outlet capacity: 60 VA/m² Story height of typical floor: 4.4 m Ceiling height of working space: 3.0 m Large opening in north and south exterior walls via open ceiling Two relaxation spaces are provided on each typical floor with a smoking area, vending machines, a mini-kitchen, a water cooler, and more. Earthquake resistance performance 30% higher than the value specified in the Building Standard Law Buckling restrained braces and toggle mechanism dampers have been installed. Grid type system ceiling (access hole in entire face) Response to disasters by system category according to the degree of importance of ventilation and air conditioning equipment Emergency power generation equipment, uninterrupted power supply equipment, and the machine room are placed on a floor above the ground. Earthquake resistance class of equipment piping: A Wall length ration = 0.107 System toilets EPS (Electric Pipe Shaft)s are installed uniformly on typical floors.
Q-3 Outdoor Environment on Site	Most existing trees have been preserved. Green coverage ratio of exterior: 48%, area ratio of roof greening: 29% 2005 Sai-no-Kuni Saitama Scenery Award (Saitama Prefecture, 2005) received Functions are provided to the community and amenity facilities are upgraded. Shading is provided by green space, pilotis, and eaves, and the use of asphalt and concrete has been reduced.
LR-1 Energy	The PAL (Perimeter Annual Load) value is reduced by 25.9%. Amount of natural energy used: 13 MJ/(m²/year) The ERR (Energy Reduction Rate) value of all CEC(Coefficient of Energy Consumption) values is reduced by 23.7%. An energy/environment/operation state evaluation and support function (BEMS : Building Energy Management System) was introduced. After the completion of construction, thermal environment measurement was conducted and commissioning of each piece of equipment was implemented.
LR-2 Resources and Materials	Toilet flushing sound simulator and ultra water-saving western type toilet bowls have been installed. Well water, rainwater, and air conditioning drainage are used. Waste water from kitchens is recycled. Nitrogen gas fire extinguishment equipment with ODP (Ozone Depletion Potential) = 0 Thermal insulating materials with ODP(Ozone Depletion Potential) = 0 and low GWP(Global Warming Potential) value
LR-3 Off-site Environment	Large-scale greening Water-permeable pavement Rainwater is used and waste water from kitchens is recycled. Composters have been installed, and compost made from kitchen garbage is sold to neighboring farmers.

Other Features

Glass photocatalyst coating
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Water heat storage tank
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No soil was carried out of the site during construction work.
Utility tunnels are maintained.
CO₂ emissions and waste reduction were monitored by holding LCCO₂ Committee meetings regularly during construction.

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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).