ABSTRACT
This chapter presents a report mainly on Yanagimachi Solar House II and its actual operating data. Then Yanagimachi Solar House II was newly designed and built, and was completed in the autumn of 1958. An important feature in maintaining comfort within the residence during both summer and winter is the use of reflective curtains and reflective wallpapers, which not only prevent excessive absorption of solar heat and minimize heat loss and heat gain, but give a more comfortable condition in conjunction with the radiant ceiling panels. As regards the initial cost installation of the solar system, it cannot be competitive, but even now costs can be kept down to the point where they are at least as low as those of a conventional central air-conditioning system as far as planning, construction and materials for the house itself are concerned. Room temperature and humidity were kept at a satisfactory level as indicated in the recording charts.
