Can AutoMEP size ducts and pipes for me?
Yes. Give it the load rather than the size, for example "add a supply duct from the AHU to the Exercise Room for 1,200 cfm" or "run cold water to the new sink", and AutoMEP picks the size from a published table instead of guessing at one.
What it can size: supply and return ductwork, water supply pipe, sanitary drainage by fixture units and gradient, and roof and rainwater drainage. It works in both imperial and metric, and it writes sizes in the units your drawing is already using.
Your project's codes choose the tables: in a project created on or after 09/28/2026, the standards you pick decide which tables are used, one discipline at a time. For plumbing (supply pipe, drains and roof drains), a project that lists IPC or UPC is sized to US tables, meaning IPC fixture minimums, ASHRAE velocity limits and the IPC drainage tables, even when the drawing is in meters. A project that lists European (EN) and not IPC or UPC is sized to EN 806-3 and EN 12056. For ductwork, IMC or UMC means SMACNA standard sizes, and European (EN) means EN 1505 and EN 1506. The European tables only come in metric, so an EN project with an imperial drawing is sized to the US tables, and the job's note says so. ASHRAE, NEC, NFPA, IBC and IFC don't choose a sizing table. If a project names none of these, or was created before 09/28/2026, the drawing's own units decide: an imperial drawing gets the US tables and a metric drawing gets the European ones.
It tells you where the size came from: the notes on a finished job carry a line reading "Sized with reference to", followed by the table that was consulted, so a size you are asked to check is a size you can trace. The tables behind it include SMACNA and EN 1505 and EN 1506 for duct, ASME B36.10M for steel pipe, ASTM B88 for copper tube, EN 1057, EN 1401-1, EN 1451-1 and EN 12201-2 for metric pipe, the International Plumbing Code and EN 806-3 for water supply, and the International Plumbing Code and EN 12056 for drainage and rainwater.
Read it as a starting point, not a sign-off. Naming the table says which reference was used to choose a size. It does not say the finished installation complies with anything, and it is not a substitute for an engineer reviewing the drawing.
What it can size: supply and return ductwork, water supply pipe, sanitary drainage by fixture units and gradient, and roof and rainwater drainage. It works in both imperial and metric, and it writes sizes in the units your drawing is already using.
Your project's codes choose the tables: in a project created on or after 09/28/2026, the standards you pick decide which tables are used, one discipline at a time. For plumbing (supply pipe, drains and roof drains), a project that lists IPC or UPC is sized to US tables, meaning IPC fixture minimums, ASHRAE velocity limits and the IPC drainage tables, even when the drawing is in meters. A project that lists European (EN) and not IPC or UPC is sized to EN 806-3 and EN 12056. For ductwork, IMC or UMC means SMACNA standard sizes, and European (EN) means EN 1505 and EN 1506. The European tables only come in metric, so an EN project with an imperial drawing is sized to the US tables, and the job's note says so. ASHRAE, NEC, NFPA, IBC and IFC don't choose a sizing table. If a project names none of these, or was created before 09/28/2026, the drawing's own units decide: an imperial drawing gets the US tables and a metric drawing gets the European ones.
It tells you where the size came from: the notes on a finished job carry a line reading "Sized with reference to", followed by the table that was consulted, so a size you are asked to check is a size you can trace. The tables behind it include SMACNA and EN 1505 and EN 1506 for duct, ASME B36.10M for steel pipe, ASTM B88 for copper tube, EN 1057, EN 1401-1, EN 1451-1 and EN 12201-2 for metric pipe, the International Plumbing Code and EN 806-3 for water supply, and the International Plumbing Code and EN 12056 for drainage and rainwater.
Read it as a starting point, not a sign-off. Naming the table says which reference was used to choose a size. It does not say the finished installation complies with anything, and it is not a substitute for an engineer reviewing the drawing.
More in MEP Operations
Did this answer your question? If not, contact support and send us the drawing.