Fittings and loss errors have been annoying in Revit MEP for quite some time. If we were striving for a warning free model then we'd be confounded at every turn by fittings and their loss for loss. In Revit 2015 R2 and 2016 we've got the option to assign fitting's Loss Method parameter to Coefficient from ASHRAE Table.
The ASHRAE Table Settings dialog displays graphical information that is associated with duct fittings table. We can choose from among the fitting descriptions in the table or accept the default one that is already selected.
The ASHRAE Table Settings dialog displays graphical information that is associated with duct fittings table. We can choose from among the fitting descriptions in the table or accept the default one that is already selected.
If you select a fitting randomly and check this out you may find the dialog set to None. It only starts to work when components are well connected. That means, if you see warnings associated with fittings, its likely those fittings are not part of a well connected network yet.
