| abstract |
An outer wall member capable of reducing the amount of heat input / output into the room and reducing the air-conditioning energy when the room temperature is kept constant by the air-conditioning equipment regardless of fluctuations in the outdoor air temperature, and the outer wall A building having a member is provided. An outer wall member having a heat storage layer between an outdoor heat insulating layer and an indoor heat insulating layer, wherein R represented by the following formula (3) is 0.20 or less. R = 2 (R1-0.5) 2 + (R2-1) 2 + (R3-0.55) 2 (3) (in formula (3), R1 is represented by the following formula (1). R1 = (Tb / Kb) / (Ta / Ka + Tb / Kb) (1), Ka is the thermal conductivity of the outdoor heat insulating layer 3, Ta is the thickness of the outdoor heat insulating layer 3, and Kb is the room It is the heat conductivity of the inner heat insulating layer 4, and Tb is the thickness of the indoor heat insulating layer 4. R2 is 15 ° C. to 40 ° C. with respect to the latent heat amount of the heat storage layer in the temperature range of −10 ° C. to 60 ° C. The ratio of the latent heat amount within the temperature range of R3 = L5 / L20 (2) [Selection] Figure 1 |