Abstract
This paper describes the results of the field measurement using eight detached houses in the same site in Sendai City to investigate the airtightness and the heat loss coefficient. The heat loss coefficient of each house was measured simultaneously according to the measurement method of JIS's report, and was compafed with the design value. The major results are as follows : (1) The equivalent aif leakage area per floor area of these houses was 3.0〜16.4 cm^2/m^2. The house with the largest leakage area was constructed by conventional method. (2) The heat loss coefficient per floor area was 1.74〜3.08kcal/m^2h℃. But this value depended on the climatic condition and measurement condition. (3) Measured value of heat loss coefficient except infiltration load using the data of airtightness was within about ±15% of the design value using specifications.
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