Abstract
A well-insulated and airtight house with two generations including six family members was evaluated by a long-term measurement of thermal environment and energy consumption. The house, located in Sendai City (capital city of the Tohoku District), has a mechanical ventilation and space heating systems. The measurements were performed from November 1996 to February 1998. As a result, it was found that the indoor thermal environment of the house during the heating season was comfortable. However, the amount of energy consumption for space heating is relatively large, compared with other ordinary houses.Because the floor area of this house is large and indoor temperature in every room is stable at around 20℃ due to operation of space heating in all day.
