ACP Revit Mechanical cheat sheet

Worksharing: enable Worksets before modeling; each user owns a workset, and borrowing occurs per element or per workset depending on the Workset setting in the Worksets dialog.

Central model location must be on a network share all users can reach; local copies are created via Create New Local, and Synchronize with Central pushes changes back.

Linked models use Shared Coordinates: acquire coordinates from the architectural or civil link, then Publish Coordinates to push the shared system into other links.

Copy/Monitor maps levels and grids from a linked model; Monitor uses Coordination Review to flag moved or deleted monitored elements.

Project units, duct and pipe sizing, and calculation settings live in Manage > MEP Settings; these control how the model computes flow, pressure, and sizing.

View templates lock visibility, detail level, discipline, and V/G overrides so sheet views stay consistent across the team.

Phase mapping in V/G controls which linked model phases display; link phase status must match the host project's phase names to avoid hidden geometry.

Interference Check runs between host and linked models or selected sets; results export to HTML and do not persist as model elements.

System classification (Supply, Return, Exhaust, Other Air) determines available system types; connectors must be assigned the correct classification before Create Systems works.

Duct sizing methods: Equal Friction, Static Regain, and Velocity; Equal Friction uses friction loss per unit length and is the default for most layouts.

Airflow is set on space or zone elements; spaces inherit from Space Naming and zones aggregate spaces, and system flow derives from assigned spaces.

Duct pressure loss uses the ASHRAE duct fitting database; fitting loss coefficients (ASHRAE Table 4-1 through 4-* ) come from the fitting's part type and the Loss Method setting.

Place Air Terminals with the correct flow and connector orientation; an unconnected connector prevents the terminal from joining a system.

Use Automatic Duct Layouts or Generate Layout for plenum and rectangular layouts; routing preferences control duct types, fittings, and transitions.

Duct systems need an assigned System Type and an equipment element (AHU, VAV, fan) with a supply connector to calculate flow and pressure.

Check Systems panel shows flow, pressure drop, and unconnected elements; use it to validate before running calculations.

Pipe system types: Domestic Cold Water, Domestic Hot Water, Sanitary, Storm, Hydronic Supply, Hydronic Return, and others; each has a system classification and Abbreviation.

Piping slope is set per pipe segment via Slope value and Slope Lock; sanitary and storm systems require slope for gravity flow.

Pipe sizing methods: Fixture Units (Hunter curves for domestic water), Velocity, and Friction; sanitary uses fixture units and slope.

Pipe connectors carry Flow, Pressure, and System Type; a pipe must connect to a fixture or equipment connector to join a system.

Hydronic systems use supply and return loops; the pump or boiler equipment connector defines the pressure drop baseline for the system.

Pipe routing preferences set the pipe type, fitting families, and minimum size; edit them in Manage > MEP Settings > Pipe Settings.

Plumbing fixture families need a connector with the correct system classification (Domestic Cold Water, Sanitary) to participate in systems.

Use the System Inspector to review flow and pressure along a branch and identify undersized or disconnected segments.

Family categories and parameters: shared parameters come from an external .txt file and are required for schedules and tags across projects.

Connector elements in families define Flow, Size, System Classification, and Direction; a connector's direction (In, Out, Bidirectional) determines system flow behavior.

Use Family Types dialog to manage type parameters; instance parameters vary per placement and cannot be scheduled by type.

Nested families propagate parameters via association; link nested parameters in the parent family to expose them.

Formula parameters in families use Revit formula syntax: if(condition, true, false), and units are implicit from the parameter type.

MEP families typically use the Pipe Connector, Duct Connector, or Electrical Connector elements; the connector's system type must match the host system.

Use the Family Editor's Reference Planes and Dimension constraints (labeled dimensions) to drive parametric geometry; avoid over-constraining.

Load families into projects via Load into Project; project parameters and shared parameters must exist in the project for scheduling.

Spaces and Zones: spaces capture volume and airflow; zones aggregate spaces for system sizing; both can be scheduled.

Heating and Cooling Loads analysis uses the gbXML export or the built-in load calculation; results depend on space boundaries and constructions.

Schedules are built from categories and fields; use Calculated Values for formulas and Filter by parameter to isolate systems.

Schedule Keys apply a set of parameters to many elements; useful for assigning system types or design criteria in bulk.

Sheet creation: place views on sheets, use view titles and sheet numbers; Sheet List schedule tracks sheets and revisions.

Tags and annotations use shared parameters; a tag family's label must reference the parameter to display it.

System Browser organizes systems by type and shows flow, size, and connected elements; use it to review system hierarchy.

Export to gbXML or IFC for analysis; check the export settings for space boundaries and system classification mapping.