The condensation resistance of the aluminum curtain wall in winter is governed by the indoor conditions of temperature and relative humidity and the outdoor temperature. In summer, the condensation resistance of the aluminum curtain wall is governed by the outdoor temperature, the outdoor relative humidity and the indoor air conditioned temperature.
Condensation occurs on the glass or aluminum surfaces when the humidity of the surrounding air comes in contact with a cold surface to change from a vapor to liquid. The temperature at which this change occurs is the dew point temperature of the surrounding air.