Under the action of wind pressure a

Under the action of wind pressure and hot pressure, the cold air outside penetrates into the room through cracks such as doors and Windows, and escapes out of the heating room after indoor heating. The heat consumed by this part of the leakage is called the heat consumed by the infiltration of cold air.According to the "HVAC Code", the gap method is used to calculate the cold air penetration heat consumption of civil buildings.For multi-storey buildings, the heat consumption of cold air infiltration can be determined by calculating the gap length of doors and Windows and the amount of cold air infiltration from each meter of gap