House on Gakuenodori

Last Uploaded: December, 2009


Full view of north side © Koji Okamoto

Special Features

Q-1 Indoor Environment	Passive environmental control by the dirt floor space lying north to south and open to the ceiling of the second floor Facilitating ventilation and drafts in each room facing the dirt floor Passive cooling using the thermal capacity of the dirt floor Functioning as a space for collecting and storing heat and as a buffer space Selective and effective indoor environment by openable/closable fittings
Q-2 Quality of Service	The durability of the structure is improved by adopting an aerated layer method for the exterior walls An open plan flexibly available for various applications is adopted Large living and storage spaces are prepared for a future lifestyle Plural access ports are provided for maintenance of the plumbing piping and the underfloor heating system A water supply header system is adopted for easy extension and replacement of piping
Q-3 Outdoor Environment on Site	The design of the house gives consideration to the setback distance from the boundary line and the exterior and emphasizes harmony not only with existing houses but also with adjacent planned construction sites A greening area of more than 70% of the site is achieved by planting, lawning, and a turf parking space An installation space for the EcoCute hot water storage unit is provided so that it is not exposed
LR-1 Energy	This house fulfills the next-generation energy saving standard so that it has sufficient heat insulation and airtightness performance Planning and construction ideas capable of ensuring selective, efficient passive environmental control are achieved Energy- and water-saving equipment is selected Air conditioner (110% or over of the top runner standard value of the Act on the Rational Use of Energy) EcoCute (COP = 4.9) Total enthalpy heat exchanger (annual electrical power consumption is 1.84kWh/year(m³ /h) or below) Toilet bowl, faucet, dish washing machine (all energy-saving types)
LR-2 Resources and Materials	As many renewable materials and recycled materials as possible were utilized with consideration for the design and structure of the house (dirt floor material: soil ceramic tile, etc.) Consideration was given to reducing loss at the time of the pre-cutting of structural materials at the production and construction stages Waste was minimized by site supervision
LR-3 Off-site Environment	Low-noise type air conditioners, a hot water supply system, and a ventilation system were adopted and installed so that exhaust air is not released toward the openings of the neighboring houses Heat shielding sheets of about 0.7 in albedo are used for the roof surface

Other Features

To provide a comfortable living environment with minimum energy consumption, simulations were performed when selecting models of equipment and systems

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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).