The cooling load and the emission of the heat is the cause of the haet island phenomenon. This nursing home is made by plants and perforated concrete which retains water and modifies the microclimate of the surroundings. Bricks and plants sprinkled by water lets in the wind and cool the air passively.This is a sustainable building that will function without using fossil energy according to Tara Ashihara and Akira Hoyario.
How tobe responsive to the rich natural surroundings is a wish of the client family who hope to liveclose to the nature and a theme a passiv design of this house that utilize the enviroment potentials given to this region in the relatively tempaate climate.
The main floor is rose up for minimizing the earth work with less fot prints to the original landscape and is for accessed by the slender bridge from north side.This is for avoiding the risk of river flood as well.
A direct gain solar system for passive heating and a night-time ventilation system for passive cooling the two simple passive techniques in the house work well and succeed to reduce the heating-and cooling load drastically. This design is carefully proceeded with an interactive computer design tool which was developby the authors and results in good thermal performance. An important advantage of passive design allows the life style to be reponsive to the enviroment as well as to contribute for the reduction of enviroment impacts. This is a case study as one of prototypes for eco-continouos passive and sustainable design in temperate climate.