An HVAC equipment schedule is the tabular register of every major mechanical unit on a project, one row per unit, keyed by its equipment mark. It is the mechanical cousin of the instrument index: the single place where each air handler, chiller, boiler, pump, and cooling tower is named, located, sized, and given its electrical characteristics.
This is a reference for the engineer building or checking that schedule. It covers the columns that belong on it, a worked example by equipment type, and how the schedule reconciles against the plans and the BMS points list. It stays on the schedule as a deliverable; it is not an equipment selection guide.
Key takeaways
- One row per equipment mark. The mark is the key that ties the schedule to the plans, the electrical load list, and the BMS points list.
- Keep a consistent column set per equipment type. Air-side units carry airflow columns; pumps carry flow and head; plant carries heating or cooling capacity.
- VAV terminal boxes get their own schedule, keyed by box tag, because they repeat one pattern across dozens of zones.
- Every scheduled unit that carries controls must also appear on the BMS points list, keyed by the same mark.
- The schedule is compiled off the mechanical drawing set; every equipment mark on a plan should resolve to exactly one row.
What the schedule is for
The equipment schedule is read by more people than any other mechanical document. The controls contractor reads it to know which units they are integrating. The electrical engineer reads the electrical columns to build the panel schedule and feeder sizing. Procurement reads the basis-of-design and capacity columns to buy the equipment. The commissioning agent reads it to build the equipment checklist. A schedule that is missing a column, or that disagrees with the plans, sends all four of those people back to the drawings.
Because it serves so many readers, the discipline is consistency, not volume: the same columns filled the same way for every unit of a type, and one mark per row.
The columns that matter
Every HVAC equipment schedule shares a common spine, then adds a few performance columns per equipment type.
| Column | What it carries |
|---|---|
| Equipment mark | The unique tag, e.g. AHU-1, CH-1. The key everything else references. |
| Service / area served | What the unit conditions or serves (a floor, a zone, a process room). |
| Location | Where the unit physically sits (mechanical room, roof, ceiling space). |
| Basis of design | The make and model the design was sized around, for procurement. |
| Capacity | The primary rating for the type: tons for chillers, MBH for boilers, CFM for air handlers. |
| Electrical | Voltage, phase, frequency, and the motor or unit electrical load. |
| Remarks | Interlocks, redundancy (N+1), phasing, and anything that is not a column. |
The electrical column is the one most often left thin, and the one the electrical engineer needs most. Carry the voltage/phase/frequency and the load characteristic the panel schedule is built from, per unit.
A worked example
The tags below are synthetic, but they show the shape. Note that each equipment type fills the capacity and airflow columns differently, which is why a per-type schedule reads more cleanly than one sparse combined table.
| Mark | Service | Location | Capacity | Airflow / flow | Electrical |
|---|---|---|---|---|---|
AHU-1 | Level 2 offices | Roof | 40 tons cooling coil | 16,000 CFM supply, 4,000 OA | 460 V / 3 / 60, 25 HP fan |
CH-1 | Chilled water plant | Mechanical room 1 | 300 tons | 720 GPM evaporator | 460 V / 3 / 60 |
B-1 | Heating hot water | Mechanical room 1 | 2,000 MBH | 200 GPM | 120 V / 1 / 60 controls |
CWP-1 | Chilled water primary | Mechanical room 1 | n/a | 720 GPM at 60 ft head | 460 V / 3 / 60, 15 HP |
CT-1 | Condenser water | Roof | 360 tons rejection | 900 GPM | 460 V / 3 / 60, 20 HP fan |
What each equipment type adds
- Air handlers and rooftop units add supply, outside-air, and exhaust airflow in CFM, external static pressure, and the coil capacities (cooling and heating). The economizer and the fan array, if present, are remarks.
- Chillers add the tonnage, the evaporator and condenser flow and pressure drop, and the compressor count. Water-cooled versus air-cooled is a remark that changes whether a cooling tower row exists.
- Boilers add the heating capacity in MBH, the flow, and the fuel or the electric input. Condensing versus non-condensing changes the flue and the return-water column.
- Pumps replace the airflow columns with flow in GPM and head in feet, plus the motor HP. The service (chilled, condenser, hot water) is what keeps two identical pumps distinct.
- Cooling towers add the heat rejection capacity and the condenser water flow, with the fan motor in the electrical column.
- VAV terminal boxes get their own schedule (box size, minimum and maximum airflow, reheat coil, controller), cross-referenced from the air handler that serves the zone.
How it reconciles with the rest of the set
The equipment schedule sits at the center of three documents that must agree. Every equipment mark on a mechanical plan should resolve to exactly one schedule row. Every scheduled unit that carries controls should appear on the BMS points list, keyed by the same mark. And the electrical characteristics on the schedule should match the load list the panel schedule is built from. Reconciling the three is what catches the unit that is drawn but never scheduled, or scheduled but never given its points.
Build the equipment schedule first. It is the spine the points list and the electrical load list both hang on, and keeping the mark consistent across all three is what makes the set auditable.
A starting point
If you are assembling one from a drawing set, the HVAC equipment schedule template gives a pre-formatted column set you can populate per equipment type. For the wider picture of turning a mechanical control set into registers, the building automation hub links the points-list and device-schedule work that sits alongside the equipment schedule. Once the schedule is complete, marked consistently, and reconciled against the plans, every reader downstream is working from one register instead of re-deriving it from the drawings.