Designing and Drafting ventillation and air conditioning ducts using AUTOCAD software Calculating heat load and tonnage of refrigeration for air conditioning using HAP software Duct sizing for ventillation and air conditioning ducts using duct sizer tool Pipe sizing for chiller water supply and chiller water return pipes in chiller type A/C using pipe sizer tool Pump selection for chiller A/C Fan selection for treated fresh air handling unit, return air exhaust, toilet exhaust and ventillations by external static pressure calculation(ESP) Bill of quantity estimation ASHRAE & ISHRAE standards & codes