# Equipment

Source: https://meptools.com/tools/plant-room-studio/docs/equipment/

Press **E** to open the equipment library, then drag an item onto the floor. Each item carries
its own footprint, clearances, weight, and heat load — the same data the validator and the 3D
model use.

## Library categories

The library groups items by category. Labels below are the codes shown on the plan.

| Category         | Items (label)                                                                                                   |
| ---------------- | --------------------------------------------------------------------------------------------------------------- |
| MV / transformer | RMU (MV switchgear), TX (oil transformer), TX-D (dry transformer)                                               |
| LV distribution  | MDB, SMDB, SMDB-W (wall), DB, MCC, PDU, RPP, ATS, CAP (capacitor bank)                                          |
| Backup power     | UPS, BAT (battery bank), GEN (generator), FUEL (fuel tank), GAS (suppression)                                   |
| Mechanical       | AHU, FCU, CRAC, chillers (CH-A/CH-W), ACCU, fans (EF/SF/JF), CT, HX, pumps (PUMP/FP/TP), tanks (WT/ET), CAL, PV |
| ELV / ICT        | RACK (ICT rack), NET-W (wall rack), BMS, FACP, LEAK                                                             |
| Custom           | Items you define yourself (see below)                                                                           |

## Item properties

Every library item defines:

- **Footprint** — width × depth × height, in millimetres.
- **Clearances** — required free space on the front, back, left, right, and (where relevant)
  top faces, in millimetres.
- **Maintenance faces** — the faces that need clearance access (front only for most panels; front
  **and** rear for ICT racks).
- **Mounting** — floor-standing (elevation 0 mm) or wall-mounted (default **300 mm** above
  finished floor).
- **Weight** and **heat load** — for reference and future scheduling.

For example, the default **MDB** is 2400 × 800 × 2200 mm with 1200 mm front clearance and a
front maintenance face; a default **ICT rack** is 600 × 1000 × 2000 mm with 900 mm clearance on
**both** its front and rear faces.

> **These are library defaults, not certified values.** Footprints and clearances come from
> typical manufacturer datasheets and are flagged as defaults in the tool. Verify every figure
> against your actual equipment schedule and your authority having jurisdiction before relying on
> the layout.

## Placing, moving, and rotating

- **Drag** an item from the library onto the floor.
- **Move** with the pointer (the **M** tool) or nudge a selected item with the arrow keys.
- **Rotate** the selection 90° with **Shift+R**. Rotation is clockwise from above and carries
  through to clearances and the 3D model.
- **Delete** the selection with **Delete**.

## Custom equipment

If a required item isn't in the library, add a **custom** item with your own footprint and
clearances. It appears in the **Custom** category and is validated exactly like a built-in item.

![The equipment inspector with clearances, placement preferences, and removal fields](./_assets/equipment-inspector.png)

## Placement preferences

In the inspector's **Placement Preferences (Optional)** section, pick a target equipment item and
whether this one prefers to sit **to the left of** or **to the right of** that target. It's a
hint for automatic placement, not a hard constraint — a target can hold at most one preference on
each side.

## AutoFit fields

If you plan to run [AutoFit](/tools/plant-room-studio/docs/autofit), the inspector also carries
fields its rule engine reads: **Equipment class**, **Voltage band**, and **NEC condition**, plus
**Whole-unit removability** (**In situ**, **Removable**, or **Vertical transfer**). A removable
item adds which side it comes out, its size while being moved, how it's moved (carried by hand,
on a trolley or pallet truck, or lifted by crane or gantry), the clear floor each face needs, and
any parts that come out on their own. **Lock equipment** holds an item fixed so AutoFit can't move
it (it also blocks manual move, rotate, and delete).

Once equipment is placed, check [clearances](/tools/plant-room-studio/docs/validation).

> Equipment **groups** and IFC export/import: grouping is an editor concept only — an IFC
> round-trip does not carry groups. See [Exporting](/tools/plant-room-studio/docs/exporting).