The regular of area counting ways
1. The house area:Exterior wall length*exterior wall width*floor number .
2. Standard stair:4.5m2/PC, corner stair(special foe three floors house):16.4m2/PC.
3. Awning area：house shadow area*0.5.
4. Aisle board area:house shadow area.
5. Total area=1+2+3+4
6. Expect the non-standard house, this regular is suitable for all house.
7. Above regular also is fit for the flat style house.