The annual air-conditioning loads calculated from three kinds of reference weather year (RWY) were compared. The RWYs used for the comparison were Expanded AMeDAS Reference Weather Year (EA-RWY) of 1995 yr versions and 2000 yr versions, and SHASE Reference Weather Year (SHASE-RWY). The following results were obtained. 1) As for the heating and cooling load calculated from the EA-RWY of 2000 yr versions, it was found that the proportion of the cooling load increased and the proportion of heating load decreased than that of 1995 yr versions. 2) The total cooling and heating load calculated from the EA-RWY of 2000 yr versions was similar to that of 1995 yr versions. 3) As for the heating and cooling load calculated from the EA-RWY, it was found that the proportion of the cooling load increased and the proportion of heating load decreased than that calculated from the SHASE-RWY. 4) The total cooling and heating load calculated from the EA-RWY was similar to that calculated from the SHASE-RWY.

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