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a. Ventilation wall is to make the exterior wall a hollow sandwich wall with an air layer, and have air inlets and air outlets in the lower part and the upper part respectively. The air in the interlayer rises after being heated, forming a pressure difference inside, driving the internal air flow, which can take away the internal heat and moisture. After adding a ventilated interlayer to the exterior wall, the inner surface temperature can be greatly reduced, and the greater the solar radiation, the more significant the heat insulation effect of the ventilated air interlayer, so it is more obvious for east-west walls. In summer, the indoor temperature difference from that of ordinary houses is more than 5 degrees.
b. The movement of air flow in the exterior wall ventilation wall takes away the internal heat and moisture, always keeping the exterior wall surface ventilated and dry, and the wall structure is stable and non-deforming, ensuring a long service life.