HVAC Sheet Metal and HVAC Mechanical Estimating Software has seen many productivity advancements with the introduction of improved software tools designed to make the estimating  process easier-to-use. 

BIM -Building Information Modeling Is a computer aided process for developing building data during the construction design and building life cycle. BIM software contains elements of a building design as individual objects that include the geometry and attributes in the building design. BIM software design tools provide the ability to extract many different views of an object in a building model that may be relevant for other uses in the drawing process or downstream construction process.