SIngle button to change from IP to SI in a drawing.
We currently can label ducts in SI units, using CM or MM. You can also label airflow in LPS.
All the calculations are done in imperial units and ducts are sized to even inches. It is just the labels that we can currently change.
WID EL-AMER commented
VERY IMPORTANT TO ALSO HAVE SI UNITS FOR DUCT ANNOTATIONS AND IP ANNOTATIONS FOR AIR FLOW CFM