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Revit 2010 Key Features
§RAC: Sophisticated Form Generation
§RST: Slanted Columns
§RME: Discrete Heating and Cooling Load Calculation
§(space type, people, construction type and electrical load)
RAC: Sophisticated Form Generation - Revit will have more powerful way to make more complex shapes. (AutoCAD has a similar one in the upcoming release they call it organic modeling. It’s similar.  Now a days, there are lots of strange shaped building (or we should say not square).

RST: in the past release column was always vertical. You couldn’t make tilted column.

RME: At space level objects, we have Space Type, People, Construction Type and Electrical loads were added in the space properties palette. These are no longer drop down list but a complete dialog.  At project level, energy data has location, has additional tab called weather, the closest weather station is automatically selected. This is ASHRAE peak weather data is shipped with Revit MEP and user can override it as well.  Heat and cooling dialog will generate much faster and detailed reports. This report can be set to standard\detailed etc. based on surfaces clubbed together.