🧱 4. Group Work into Work Packages (HVAC New Construction)
```1. Rough-In Work Package
🔹 Scope:
- Install duct mains and branch runs (sheet metal or flexible)
- Install supply, return, and exhaust ductwork
- Fire/smoke dampers (in-wall or ceiling)
- Refrigerant lines and drains (mini-splits, VRF)
- Duct hangers, supports, seismic bracing
- Penetrations through fire-rated assemblies (sleeving/sealing)
- Shaft work (duct risers in multistory buildings)
- Early condensate drain piping
🛠️ Deliverables:
- Fully routed ductwork in wall/ceiling cavities
- Refrigerant piping roughed-in to terminal units
- Coordination with framing, plumbing, and electrical
🔧 Trades Involved: Sheet metal crew, piping crew, electrical coordination
2. Equipment Setting Work Package
🔹 Scope:
- Place AHUs, RTUs, VAVs, FCUs
- Set chillers, boilers, pumps, cooling towers
- Lift and mount rooftop equipment (crane coordination)
- Secure pads, isolators, vibration dampeners
- Install hanger rods/supports for suspended units
- Begin piping or duct connections for units
🛠️ Deliverables: Equipment placed and labeled, basic connections, clearance maintained
🔧 Trades Involved: Sheet metal, pipefitters, rigging/lifting, general contractor
3. Insulation Work Package
🔹 Scope:
- Insulate supply and return ducts
- Wrap outside air and exhaust ducts
- Insulate chilled water, heating water, and refrigerant piping
- Protect insulation with jacketing/mastic
- Labeling per specifications
🛠️ Deliverables: Complete insulation, vapor barrier, code-compliant
🔧 Trades Involved: Insulation contractor, coordination with others
4. Trim-Out Work Package
🔹 Scope:
- Install grilles, registers, diffusers (GRDs)
- Install thermostats and wall-mounted controls
- Connect flex duct to GRDs
- Final unit connections (VAV boxes, fan coils)
- Install exposed decorative/spiral ductwork
🛠️ Deliverables: Devices installed, system balanced, room equipment labeled
🔧 Trades Involved: Sheet metal, controls team, electrical
5. Controls Work Package
🔹 Scope:
- Install temp/flow/pressure sensors
- Mount and wire controllers (DDC/BAS)
- Network integration and panel wiring
- Start-up of VAVs, AHUs, RTUs
- Commissioning and point-to-point checks
🛠️ Deliverables: Points mapped, controllers tested, functional testing complete
🔧 Trades Involved: Controls sub (e.g. Siemens), electrical contractor, commissioning agent
📋 Summary Table
| Work Package | Timing | Key Outputs | Common Issues |
|---|---|---|---|
| Rough-In | Early (Framing) | Ducts/pipes in place | Clash with plumbing/electrical |
| Equipment Setting | Mid-shell | Equipment placed/labeled | Crane coordination, pad ready |
| Insulation | Mid-late | Wrapping & labeling | Insulation damage, bad seals |
| Trim-Out | Late | GRDs in place | GRD layout mismatch |
| Controls | Final | System under BAS | Missing control wiring |