Local cooling 

1) Area of workspace is large 

2) Location of workers or equipment are fixed 

3) Operation area is entirely different from other area 

4) It is no need to cooling besides the operatio area

Spot cooling 

1) Location of workers are generally fixed 

2) Workspace volume is large 

3) Heat source is distributed all over 

4) Minimum capital layout 

5) Focus on maximum comfort for workers 

 Roof mounted