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Since we used pre-fabricated structure with hot air trap in the middle, we created a positive pressure of cool air so that hot air rises and is naturally exhausted from louvers placed at the centre and sides of the hall.
Air trap: You can purchase an air trap from a beer/wine making shop or through a mail-order supplier, or you can make your own.
A weld line or air trap will occur at the point in an element that is filled last and has the highest value.
It showed up clearly as an air trap and knit line on the end of the boss exactly where the blemish was on the molded sample.

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