Foundation lemziak a ni

Duct section lem ziah a ni

Basement area ah a awm a 20 m²     (20000000 mm²)

Vent pakhat awmna area 0.012 m²     (12272 mm²)
Vent awmna hmun zawng zawng 0.061 m²     (61359 mm²)
Thli awm zat 5 thilte