BUILDING AND MEP REVIEW
Proposed model comparison
The accepted Run 4 native model beside a PROPOSED native model that adds provisional plant planning envelopes and PROVISIONAL plant connections, both federated with the same SYNTHETIC architectural model (roof, walls, partitions, ceilings, floor). The proposed model is for review only and does not replace the accepted baseline.
Heat pump HP-01 — PROPOSED planning envelope, not installed or validated
HP-01 appears only in the PROPOSED native model (wf1-NATIVE-REVIT-APS-MEP-20261022-d427192e), as a catalogue-candidate envelope "HXA Catalogue Candidate Envelope + Provisional Interfaces" of 1.10 × 3.34 × 1.88 m on the Ground Floor. It is not in the accepted Run 4 native model, is not a manufacturer selection, has not been adopted and has no engineering approval. Location: Option A external ground-level compound east of the plantroom — SYNTHETIC / SUBJECT TO ARCHITECTURAL, ACOUSTIC AND ENGINEERING REVIEW. No plant-compound or screen geometry exists; its electrical supply, BMS and defrost interfaces are recorded as BLOCKED.
Use Plant area · HP-01 in the PROPOSED viewer below to frame and select it with its external connection point.
PROPOSED — NOT ADOPTED
SYNTHETIC / SUBJECT TO ARCHITECTURAL, ACOUSTIC AND ENGINEERING REVIEW. D-S4-PLANT-R2-A (Option A provisional synthetic planning basis) + r3 PROVISIONAL plant connection design (wf1-PLANT-CONNECTION-DESIGN-20261022-r5); not architect-approved, manufacturer-verified, engineer-approved or construction-ready. The accepted model (wf1-NATIVE-REVIT-APS-MEP-20261019-1ce22c7e) is unchanged and remains the Run 4 baseline; this proposed model (wf1-NATIVE-REVIT-APS-MEP-20261022-d427192e, geometry wf1-NATIVE-REVIT-APS-GEOM-20261022-3ac55842, PARTIAL) is for review only.
Provisional planning envelopes only: no manufacturer selection, no connectors and no plant pipework connections are modelled.
1312 of 1312 accepted elements unchanged · 82 added · 0 removed or changed (match: category, family, type, size, mark and bounding box (1 mm)).
Added in the proposed model (82 elements)
| Mark | Category | Family / type | Size (bounding box) | Data status |
|---|---|---|---|---|
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 1000 × 89 × 89 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 1000 × 89 × 89 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 1000 × 60 × 60 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 1000 × 60 × 60 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 89 × 89 × 1524 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 89 × 1398 × 89 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 348 × 89 × 89 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 89 × 89 × 224 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 89 × 89 × 374 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 548 × 89 × 89 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 89 × 1798 × 89 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 89 × 89 × 1674 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 60 × 60 × 1992 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 60 × 4334 × 60 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 384 × 60 × 60 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 60 × 60 × 692 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 60 × 60 × 842 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 584 × 60 × 60 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 60 × 4734 × 60 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 60 × 60 × 2142 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 89 × 89 × 224 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 89 × 1148 × 89 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 1948 × 89 × 89 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 89 × 89 × 1024 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 89 × 89 × 1324 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 1648 × 89 × 89 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 89 × 1024 × 89 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 89 × 324 × 89 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 3048 × 89 × 89 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 89 × 848 × 89 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 1148 × 89 × 89 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 89 × 89 × 724 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 60 × 60 × 242 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 60 × 184 × 60 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 1984 × 60 × 60 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 60 × 60 × 1042 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 60 × 60 × 1342 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 1684 × 60 × 60 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 60 × 242 × 60 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 60 × 1342 × 60 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 4384 × 60 × 60 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 60 × 284 × 60 mm | — |
| — | Pipes | Pipe Types / HXA Steel Pipe (WF1 DN range) | 60 × 60 × 742 mm | — |
| — | Pipe Fittings | Elbow - Butt Welded - CS / Standard | 89 × 121 × 121 mm | — |
| — | Pipe Fittings | Elbow - Butt Welded - CS / Standard | 121 × 121 × 89 mm | — |
| — | Pipe Fittings | Elbow - Butt Welded - CS / Standard | 121 × 89 × 121 mm | — |
| — | Pipe Fittings | Elbow - Butt Welded - CS / Standard | 121 × 89 × 121 mm | — |
| — | Pipe Fittings | Elbow - Butt Welded - CS / Standard | 121 × 121 × 89 mm | — |
| — | Pipe Fittings | Elbow - Butt Welded - CS / Standard | 89 × 121 × 121 mm | — |
| — | Pipe Fittings | Elbow - Threaded - MI / Standard | 75 × 96 × 96 mm | — |
| — | Pipe Fittings | Elbow - Threaded - MI / Standard | 96 × 96 × 75 mm | — |
| — | Pipe Fittings | Elbow - Threaded - MI / Standard | 96 × 75 × 96 mm | — |
| — | Pipe Fittings | Elbow - Threaded - MI / Standard | 96 × 75 × 96 mm | — |
| — | Pipe Fittings | Elbow - Threaded - MI / Standard | 96 × 96 × 75 mm | — |
| — | Pipe Fittings | Elbow - Threaded - MI / Standard | 75 × 96 × 96 mm | — |
| — | Pipe Fittings | Elbow - Butt Welded - CS / Standard | 89 × 121 × 121 mm | — |
| — | Pipe Fittings | Elbow - Butt Welded - CS / Standard | 121 × 121 × 89 mm | — |
| — | Pipe Fittings | Elbow - Butt Welded - CS / Standard | 121 × 89 × 121 mm | — |
| — | Pipe Fittings | Elbow - Butt Welded - CS / Standard | 121 × 89 × 121 mm | — |
| — | Pipe Fittings | Elbow - Butt Welded - CS / Standard | 121 × 121 × 89 mm | — |
| — | Pipe Fittings | Elbow - Butt Welded - CS / Standard | 121 × 121 × 89 mm | — |
| — | Pipe Fittings | Elbow - Butt Welded - CS / Standard | 121 × 121 × 89 mm | — |
| — | Pipe Fittings | Elbow - Butt Welded - CS / Standard | 121 × 121 × 89 mm | — |
| — | Pipe Fittings | Elbow - Butt Welded - CS / Standard | 121 × 89 × 121 mm | — |
| — | Pipe Fittings | Elbow - Threaded - MI / Standard | 75 × 96 × 96 mm | — |
| — | Pipe Fittings | Elbow - Threaded - MI / Standard | 96 × 96 × 75 mm | — |
| — | Pipe Fittings | Elbow - Threaded - MI / Standard | 96 × 75 × 96 mm | — |
| — | Pipe Fittings | Elbow - Threaded - MI / Standard | 96 × 75 × 96 mm | — |
| — | Pipe Fittings | Elbow - Threaded - MI / Standard | 96 × 96 × 75 mm | — |
| — | Pipe Fittings | Elbow - Threaded - MI / Standard | 96 × 96 × 75 mm | — |
| — | Pipe Fittings | Elbow - Threaded - MI / Standard | 96 × 96 × 75 mm | — |
| — | Pipe Fittings | Elbow - Threaded - MI / Standard | 75 × 96 × 96 mm | — |
| MCP-01 | Mechanical Equipment | HXA Plan Control Panel / HXA Planning Envelope | 600 × 3000 × 2000 mm | PROVISIONAL |
| BV-CHW | Mechanical Equipment | HXA Plan Buffer Vessel Chw IF / HXA Planning Envelope + Provisional Interfaces | 800 × 800 × 1800 mm | PROVISIONAL |
| BV-LTHW | Mechanical Equipment | HXA Plan Buffer Vessel Lthw IF / HXA Planning Envelope + Provisional Interfaces | 800 × 800 × 1800 mm | PROVISIONAL |
| DP-01-02 | Mechanical Equipment | HXA Plan Dosing Pot / HXA Planning Envelope | 600 × 800 × 1200 mm | PROVISIONAL |
| HDR-01 | Mechanical Equipment | HXA Plan Header IF / HXA Planning Envelope + Provisional Interfaces | 400 × 2000 × 1500 mm | PROVISIONAL |
| PU-01-02 | Mechanical Equipment | HXA Plan Pressurisation Unit / HXA Planning Envelope | 1400 × 1200 × 1500 mm | PROVISIONAL |
| XP-CONN | Mechanical Equipment | HXA Plan External Connection IF / HXA Planning Envelope + Provisional Interfaces | 400 × 800 × 500 mm | PROVISIONAL |
| CHWP-01A-B | Mechanical Equipment | HXA Plan Pump Set Chw IF / HXA Planning Envelope + Provisional Interfaces | 1400 × 1000 × 1000 mm | PROVISIONAL |
| LTHWP-01A-B | Mechanical Equipment | HXA Plan Pump Set Lthw IF / HXA Planning Envelope + Provisional Interfaces | 1400 × 1000 × 1000 mm | PROVISIONAL |
| HP-01 | Mechanical Equipment | HXA Plan Heat Pump Candidate IF / HXA Catalogue Candidate Envelope + Provisional Interfaces | 1100 × 3342 × 1875 mm | PROVISIONAL |
| Category | Accepted | Proposed |
|---|---|---|
| Air Terminals | 33 | 33 |
| Duct Fittings | 190 | 190 |
| Ducts | 204 | 204 |
| Mechanical Equipment | 17 | 27 |
| Pipe Fittings | 398 | 427 |
| Pipes | 458 | 501 |
| Spaces | 12 | 12 |
Accepted — Run 4 baseline
NATIVE-EXPORTED MEP GEOMETRY — tessellated by Revit from model b2d7fae04a09… (wf1-NATIVE-REVIT-APS-MEP-20261019-1ce22c7e; export geom-inputs-20261021; verdict PARTIAL)
SYNTHETIC ARCHITECTURE — not architect-issued, not as-built; generated by Hexanta from the synthetic case geometry (wf1-SYNTHETIC-ARCH-MODEL-20261021-r2). A separate model; the native MEP model is unchanged.
NOT HELD — not drawn: NOT HELD: DoorsNOT HELD: WindowsNOT HELD: Wall / slab / roof thicknesses and constructionsNOT HELD: Structure (grids, columns, beams)NOT HELD: Plantroom ceilingNOT HELD: Stairs, lift shaft, cores
Display assumptions (not held data): slab thickness 250 mm (display only)
Not held — not drawn (6)
- Doors: no door positions or sizes in the case geometry
- Windows: only glazing areas per room (case fabric) and the WWR are held; no window positions or sizes — not drawn
- Wall / slab / roof thicknesses and constructions: U-values only; surfaces drawn at the case lines
- Structure (grids, columns, beams): no structural model or grid held
- Plantroom ceiling: design basis: 'wx-07 drops inside the plantroom at x 42.9 (crossing oa-m1 and gx-m1 there, where there is no ceiling) and enters r07 through the east wall at y 7.5' — plantroom ceiling not drawn
- Stairs, lift shaft, cores: not in the case geometry
- Unresolved: Plantroom r09 clear height — case.json states clear height 3.2 m; the soffit working assumption is 3.6 m. The model draws the soffit at 3.6 m (the later design-basis assumption); the difference is unresolved pending architect / structural confirmation
Rooms (12) — names, areas and level from the case geometry (SYNTHETIC)
| Room | Name | Use | Area (m²) | Level |
|---|---|---|---|---|
| r01a | Open-plan office zone 1 | office | 135 | Ground Floor |
| r01b | Open-plan office zone 2 | office | 135 | Ground Floor |
| r01c | Open-plan office zone 3 | office | 135 | Ground Floor |
| r01d | Open-plan office zone 4 | office | 135 | Ground Floor |
| r02 | Meeting room 1 | meeting | 36 | Ground Floor |
| r03 | Meeting room 2 | meeting | 36 | Ground Floor |
| r04 | Reception | circulation | 36 | Ground Floor |
| r05 | WC female | wc | 30 | Ground Floor |
| r06 | WC male | wc | 30 | Ground Floor |
| r07 | Accessible WC | wc | 18 | Ground Floor |
| r08 | East lift lobby | circulation | 30 | Ground Floor |
| r09 | Mechanical plantroom (plantroom) | plant | 108 | Ground Floor |
Coloured services: NATIVE Revit MEP geometryGrey and brown building: SYNTHETIC architecture, not architect-issued
PROPOSED — provisional plant and connections (not adopted)
NATIVE-EXPORTED MEP GEOMETRY — tessellated by Revit from model b8074ad75bb2… (wf1-NATIVE-REVIT-APS-MEP-20261022-d427192e; export geom-proposed-d427192e; verdict PARTIAL)
SYNTHETIC ARCHITECTURE — not architect-issued, not as-built; generated by Hexanta from the synthetic case geometry (wf1-SYNTHETIC-ARCH-MODEL-20261021-r2). A separate model; the native MEP model is unchanged.
NOT HELD — not drawn: NOT HELD: DoorsNOT HELD: WindowsNOT HELD: Wall / slab / roof thicknesses and constructionsNOT HELD: Structure (grids, columns, beams)NOT HELD: Plantroom ceilingNOT HELD: Stairs, lift shaft, cores
Display assumptions (not held data): slab thickness 250 mm (display only)
Not held — not drawn (6)
- Doors: no door positions or sizes in the case geometry
- Windows: only glazing areas per room (case fabric) and the WWR are held; no window positions or sizes — not drawn
- Wall / slab / roof thicknesses and constructions: U-values only; surfaces drawn at the case lines
- Structure (grids, columns, beams): no structural model or grid held
- Plantroom ceiling: design basis: 'wx-07 drops inside the plantroom at x 42.9 (crossing oa-m1 and gx-m1 there, where there is no ceiling) and enters r07 through the east wall at y 7.5' — plantroom ceiling not drawn
- Stairs, lift shaft, cores: not in the case geometry
- Unresolved: Plantroom r09 clear height — case.json states clear height 3.2 m; the soffit working assumption is 3.6 m. The model draws the soffit at 3.6 m (the later design-basis assumption); the difference is unresolved pending architect / structural confirmation
Rooms (12) — names, areas and level from the case geometry (SYNTHETIC)
| Room | Name | Use | Area (m²) | Level |
|---|---|---|---|---|
| r01a | Open-plan office zone 1 | office | 135 | Ground Floor |
| r01b | Open-plan office zone 2 | office | 135 | Ground Floor |
| r01c | Open-plan office zone 3 | office | 135 | Ground Floor |
| r01d | Open-plan office zone 4 | office | 135 | Ground Floor |
| r02 | Meeting room 1 | meeting | 36 | Ground Floor |
| r03 | Meeting room 2 | meeting | 36 | Ground Floor |
| r04 | Reception | circulation | 36 | Ground Floor |
| r05 | WC female | wc | 30 | Ground Floor |
| r06 | WC male | wc | 30 | Ground Floor |
| r07 | Accessible WC | wc | 18 | Ground Floor |
| r08 | East lift lobby | circulation | 30 | Ground Floor |
| r09 | Mechanical plantroom (plantroom) | plant | 108 | Ground Floor |
Coloured services: NATIVE Revit MEP geometryGrey and brown building: SYNTHETIC architecture, not architect-issued
Plant detail — connection register
PROPOSED r3 — PROVISIONAL connection design; not engineer-approved, not for construction
SYNTHETIC / SUBJECT TO ARCHITECTURAL, ACOUSTIC AND ENGINEERING REVIEW. D-S4-PLANT-R2-A (Option A, provisional synthetic planning basis); design model plantroom.primary_routes (CANDIDATE, MF-1 + MF-3) Register wf1-PLANT-CONNECTION-DESIGN-20261022-r6 (SHA-256 e38ae6bf1c03…); native status against wf1-NATIVE-REVIT-APS-GEOM-20261022-3ac55842 — connected natively = the PROPOSED native MEP run's own read-back reports every equipment end of the item's run as '<element>.<connector> connected to <run>' (outcome.json Checks); some ends only: PARTIAL; none: NOT YET NATIVE.
4 VERIFIED · 27 PROVISIONAL · 9 BLOCKED
HP-01
- Status
- PROVISIONAL PROVISIONAL planning envelope (PROPOSED model; not adopted)
- Location
- Option A external ground-level compound east of the plantroom — SYNTHETIC / SUBJECT TO ARCHITECTURAL, ACOUSTIC AND ENGINEERING REVIEW
- Envelope (bbox, m)
- [49.000, 0.600, 0.000, 50.100, 3.942, 1.875] (1100 × 3342 × 1875 mm)
- Compound
- zone: NOT HELD · screen: NOT HELD · gate: maintenance gate on the east side; external approach to the site ASSUMED · service_corridor: NOT HELD
- Manufacturer
- CONFIRMATION REQUIRED (catalogue candidate; not selected)
Intended CHW / LTHW connections
| Connection | Size | Category | Native status |
|---|---|---|---|
| HP-01 ↔ XP-CONN external primary — CHW FLOW HP-01.chw_flow_out → XP-CONN.chw_flow_ext | DN80 | PROVISIONAL | Connected natively |
| HP-01 ↔ XP-CONN external primary — CHW RETURN XP-CONN.chw_return_ext → HP-01.chw_return_in | DN80 | PROVISIONAL | Connected natively |
| HP-01 ↔ XP-CONN external primary — LTHW FLOW HP-01.lthw_flow_out → XP-CONN.lthw_flow_ext | DN50 | PROVISIONAL | Connected natively |
| HP-01 ↔ XP-CONN external primary — LTHW RETURN XP-CONN.lthw_return_ext → HP-01.lthw_return_in | DN50 | PROVISIONAL | Connected natively |
Other interfaces
- VERIFIED HP-01 CHW connection size 2 1/2" grooved — Published data sheet (catalogue record aermec-nrp-0600-a-4pipe): 2 1/2" grooved (source S1); position NOT HELD
- VERIFIED HP-01 full-load current 100 A (data sheet) — Published data sheet value; selection CONFIRMATION REQUIRED
- BLOCKED HP-01 electrical supply, isolator and route — No electrical design / LV distribution model; supply route NOT HELD
- BLOCKED HP-01 controls / BMS interface — Interface (protocol, points) NOT HELD; controls schematic INDICATIVE
- BLOCKED HP-01 defrost / condensate drainage — Drain point, falls and frost protection NOT HELD (public health engineer)
Engineering duties
- Selected heating duty
- 56.8 kW
- Selected cooling duty
- 106.1 kW
- Margin
- 20 % (plant_selection.margin_option = 20 %; applied once, to the base duty)
- Heat source (proposed)
- external four-pipe (polyvalent) air-source heat pump providing CHW and LTHW simultaneously; heat-recovery mode when both are needed
- Published catalogue capacity (candidate, not selected)
- cooling 123.7 kW at chw_out_in_c 7/12, ambient_c 35 (published)
- Published catalogue capacity (candidate, not selected)
- heating 137.3 kW at ambient_c 7, lthw_in_out_c 40/45 (published)
Related drawings (P08 proposed plant revision)
Schedules
Outstanding / blocked
- PROVISIONAL HP-01 ↔ XP-CONN external primary — CHW FLOW
- PROVISIONAL HP-01 ↔ XP-CONN external primary — CHW RETURN
- PROVISIONAL HP-01 ↔ XP-CONN external primary — LTHW FLOW
- PROVISIONAL HP-01 ↔ XP-CONN external primary — LTHW RETURN
- BLOCKED HP-01 electrical supply, isolator and route
- BLOCKED HP-01 controls / BMS interface
- BLOCKED HP-01 defrost / condensate drainage
Connections
VERIFIED 4 — supported by the engineering model, calculations and manufacturer data
| Item | System | Size | Native status | Basis / pending |
|---|---|---|---|---|
| NET-DIST Existing CHW / LTHW distribution (112 runs, Run 4) | CHW+LTHW | — | No native run | Native Revit model 1ce22c7e (MEP PASS) and the Run 4 sizing calculations; carried unchanged into the proposed model |
| FLOW-SEC Secondary design flows CHW 3.936 l/s, LTHW 1.368 l/s | CHW+LTHW | — | No native run | Calculated (design model pumps_and_fans): CHWP 3.936 l/s, LTHWP 1.368 l/s from native loads; header sections CHW DN80, LTHW DN50 |
| HP01-CHW-SIZE HP-01 CHW connection size 2 1/2" grooved | CHW | — | No native run | Published data sheet (catalogue record aermec-nrp-0600-a-4pipe): 2 1/2" grooved (source S1); position NOT HELD |
| HP01-ELEC-FLA HP-01 full-load current 100 A (data sheet) | electrical | — | No native run | Published data sheet value; selection CONFIRMATION REQUIRED |
PROVISIONAL 27 — declared design assumption with stated size / location; pending verification
| Item | System | Size | Native status | Basis / pending |
|---|---|---|---|---|
| HDR-chw_flow_m0 Header HDR-01 → hw-m0.CHW_FLOW (DN65) | CHW FLOW | DN65 | Connected natively | Main position and size from the accepted native model; the header is a planning envelope with a PROVISIONAL DESIGN INTERFACE at the main's former open end Pending: header manufacture / fabrication drawing; isolating valve per branch |
| HDR-chw_return_m0 Header HDR-01 → hw-m0.CHW_RETURN (DN65) | CHW RETURN | DN65 | Connected natively | Main position and size from the accepted native model; the header is a planning envelope with a PROVISIONAL DESIGN INTERFACE at the main's former open end Pending: header manufacture / fabrication drawing; isolating valve per branch |
| HDR-lthw_flow_m0 Header HDR-01 → hw-m0.LTHW_FLOW (DN32) | LTHW FLOW | DN32 | Connected natively | Main position and size from the accepted native model; the header is a planning envelope with a PROVISIONAL DESIGN INTERFACE at the main's former open end Pending: header manufacture / fabrication drawing; isolating valve per branch |
| HDR-lthw_return_m0 Header HDR-01 → hw-m0.LTHW_RETURN (DN32) | LTHW RETURN | DN32 | Connected natively | Main position and size from the accepted native model; the header is a planning envelope with a PROVISIONAL DESIGN INTERFACE at the main's former open end Pending: header manufacture / fabrication drawing; isolating valve per branch |
| HDR-chw_flow_ahu Header HDR-01 → hw-ahu.CHW_FLOW (DN50) | CHW FLOW | DN50 | Connected natively | Main position and size from the accepted native model; the header is a planning envelope with a PROVISIONAL DESIGN INTERFACE at the main's former open end Pending: header manufacture / fabrication drawing; isolating valve per branch |
| HDR-chw_return_ahu Header HDR-01 → hw-ahu.CHW_RETURN (DN50) | CHW RETURN | DN50 | Connected natively | Main position and size from the accepted native model; the header is a planning envelope with a PROVISIONAL DESIGN INTERFACE at the main's former open end Pending: header manufacture / fabrication drawing; isolating valve per branch |
| HDR-lthw_flow_ahu Header HDR-01 → hw-ahu.LTHW_FLOW (DN32) | LTHW FLOW | DN32 | Connected natively | Main position and size from the accepted native model; the header is a planning envelope with a PROVISIONAL DESIGN INTERFACE at the main's former open end Pending: header manufacture / fabrication drawing; isolating valve per branch |
| HDR-lthw_return_ahu Header HDR-01 → hw-ahu.LTHW_RETURN (DN32) | LTHW RETURN | DN32 | Connected natively | Main position and size from the accepted native model; the header is a planning envelope with a PROVISIONAL DESIGN INTERFACE at the main's former open end Pending: header manufacture / fabrication drawing; isolating valve per branch |
| pri-hp.CHW_FLOW HP-01 ↔ XP-CONN external primary — CHW FLOW | CHW FLOW | DN80 | Connected natively | Hydraulic principle MF-1 + MF-3 (D-HYD-PRINCIPLE): HP-01 → XP-CONN → 4-port buffer (decoupler) → secondary pumps → header Pending: primary rated flow and connection positions (manufacturer); pressure loss (fittings, valves, plant) NOT HELD |
| pri-hp.CHW_RETURN HP-01 ↔ XP-CONN external primary — CHW RETURN | CHW RETURN | DN80 | Connected natively | Hydraulic principle MF-1 + MF-3 (D-HYD-PRINCIPLE): HP-01 → XP-CONN → 4-port buffer (decoupler) → secondary pumps → header Pending: primary rated flow and connection positions (manufacturer); pressure loss (fittings, valves, plant) NOT HELD |
| pri-hp.LTHW_FLOW HP-01 ↔ XP-CONN external primary — LTHW FLOW | LTHW FLOW | DN50 | Connected natively | Hydraulic principle MF-1 + MF-3 (D-HYD-PRINCIPLE): HP-01 → XP-CONN → 4-port buffer (decoupler) → secondary pumps → header Pending: primary rated flow and connection positions (manufacturer); pressure loss (fittings, valves, plant) NOT HELD |
| pri-hp.LTHW_RETURN HP-01 ↔ XP-CONN external primary — LTHW RETURN | LTHW RETURN | DN50 | Connected natively | Hydraulic principle MF-1 + MF-3 (D-HYD-PRINCIPLE): HP-01 → XP-CONN → 4-port buffer (decoupler) → secondary pumps → header Pending: primary rated flow and connection positions (manufacturer); pressure loss (fittings, valves, plant) NOT HELD |
| pri-a.CHW_FLOW XP-CONN ↔ 4-port buffer primary — CHW FLOW | CHW FLOW | DN80 | Connected natively | Hydraulic principle MF-1 + MF-3 (D-HYD-PRINCIPLE): HP-01 → XP-CONN → 4-port buffer (decoupler) → secondary pumps → header Pending: primary rated flow and connection positions (manufacturer); pressure loss (fittings, valves, plant) NOT HELD |
| pri-a.CHW_RETURN XP-CONN ↔ 4-port buffer primary — CHW RETURN | CHW RETURN | DN80 | Connected natively | Hydraulic principle MF-1 + MF-3 (D-HYD-PRINCIPLE): HP-01 → XP-CONN → 4-port buffer (decoupler) → secondary pumps → header Pending: primary rated flow and connection positions (manufacturer); pressure loss (fittings, valves, plant) NOT HELD |
| pri-a.LTHW_FLOW XP-CONN ↔ 4-port buffer primary — LTHW FLOW | LTHW FLOW | DN50 | Connected natively | Hydraulic principle MF-1 + MF-3 (D-HYD-PRINCIPLE): HP-01 → XP-CONN → 4-port buffer (decoupler) → secondary pumps → header Pending: primary rated flow and connection positions (manufacturer); pressure loss (fittings, valves, plant) NOT HELD |
| pri-a.LTHW_RETURN XP-CONN ↔ 4-port buffer primary — LTHW RETURN | LTHW RETURN | DN50 | Connected natively | Hydraulic principle MF-1 + MF-3 (D-HYD-PRINCIPLE): HP-01 → XP-CONN → 4-port buffer (decoupler) → secondary pumps → header Pending: primary rated flow and connection positions (manufacturer); pressure loss (fittings, valves, plant) NOT HELD |
| sec-b.CHW_FLOW buffer → secondary pump suction — CHW FLOW | CHW FLOW | DN80 | Connected natively | Hydraulic principle MF-1 + MF-3 (D-HYD-PRINCIPLE): HP-01 → XP-CONN → 4-port buffer (decoupler) → secondary pumps → header Pending: primary rated flow and connection positions (manufacturer); pressure loss (fittings, valves, plant) NOT HELD |
| sec-c.CHW_FLOW secondary pump discharge → header — CHW FLOW | CHW FLOW | DN80 | Connected natively | Hydraulic principle MF-1 + MF-3 (D-HYD-PRINCIPLE): HP-01 → XP-CONN → 4-port buffer (decoupler) → secondary pumps → header Pending: primary rated flow and connection positions (manufacturer); pressure loss (fittings, valves, plant) NOT HELD |
| sec-r.CHW_RETURN header → buffer secondary return — CHW RETURN | CHW RETURN | DN80 | Connected natively | Hydraulic principle MF-1 + MF-3 (D-HYD-PRINCIPLE): HP-01 → XP-CONN → 4-port buffer (decoupler) → secondary pumps → header Pending: primary rated flow and connection positions (manufacturer); pressure loss (fittings, valves, plant) NOT HELD |
| sec-b.LTHW_FLOW buffer → secondary pump suction — LTHW FLOW | LTHW FLOW | DN50 | Connected natively | Hydraulic principle MF-1 + MF-3 (D-HYD-PRINCIPLE): HP-01 → XP-CONN → 4-port buffer (decoupler) → secondary pumps → header Pending: primary rated flow and connection positions (manufacturer); pressure loss (fittings, valves, plant) NOT HELD |
| sec-c.LTHW_FLOW secondary pump discharge → header — LTHW FLOW | LTHW FLOW | DN50 | Connected natively | Hydraulic principle MF-1 + MF-3 (D-HYD-PRINCIPLE): HP-01 → XP-CONN → 4-port buffer (decoupler) → secondary pumps → header Pending: primary rated flow and connection positions (manufacturer); pressure loss (fittings, valves, plant) NOT HELD |
| sec-r.LTHW_RETURN header → buffer secondary return — LTHW RETURN | LTHW RETURN | DN50 | Connected natively | Hydraulic principle MF-1 + MF-3 (D-HYD-PRINCIPLE): HP-01 → XP-CONN → 4-port buffer (decoupler) → secondary pumps → header Pending: primary rated flow and connection positions (manufacturer); pressure loss (fittings, valves, plant) NOT HELD |
| VALVES-ISO Isolating valves each side of every pump set, buffer and the header connections | CHW+LTHW | — | No native run | Engineering requirement recorded as a schedule item; not modelled natively (no Hexanta valve / accessory families); products NOT SELECTED Pending: product selection; native accessory families |
| STRAINERS Strainers on each secondary pump suction | CHW+LTHW | — | No native run | Engineering requirement recorded as a schedule item; not modelled natively (no Hexanta valve / accessory families); products NOT SELECTED Pending: product selection; native accessory families |
| NRV Non-return valves on the duty / standby pump discharges | CHW+LTHW | — | No native run | Engineering requirement recorded as a schedule item; not modelled natively (no Hexanta valve / accessory families); products NOT SELECTED Pending: product selection; native accessory families |
| BALANCING Terminal balancing by PICVs (FCUs, AHU) — existing valve schedule | CHW+LTHW | — | No native run | Engineering requirement recorded as a schedule item; not modelled natively (no Hexanta valve / accessory families); products NOT SELECTED Pending: product selection; native accessory families |
| DRAIN-VENT Drain cocks at low points, automatic air vents at high points of the primary pipework | CHW+LTHW | — | No native run | Engineering requirement recorded as a schedule item; not modelled natively (no Hexanta valve / accessory families); products NOT SELECTED Pending: product selection; native accessory families |
BLOCKED 9 — cannot be designed or placed with the information held
| Item | System | Size | Native status | Basis / pending |
|---|---|---|---|---|
| HP01-ELEC-SUPPLY HP-01 electrical supply, isolator and route | electrical | — | No native run | No electrical design / LV distribution model; supply route NOT HELD |
| HP01-BMS HP-01 controls / BMS interface | controls | — | No native run | Interface (protocol, points) NOT HELD; controls schematic INDICATIVE |
| HP01-DEFROST HP-01 defrost / condensate drainage | drainage | — | No native run | Drain point, falls and frost protection NOT HELD (public health engineer) |
| PRESS-EXP Pressurisation unit and expansion (PU-01/02) | CHW+LTHW | — | No native run | System water volume, static height and temperature range INPUT REQUIRED; sizing BLOCKED |
| SAFETY-VALVES Safety / pressure-relief valves | CHW+LTHW | — | No native run | Depend on the sealed-system design (pressurisation BLOCKED); not invented |
| FILL Filling connection (cold feed via pressurisation unit) | CHW+LTHW | — | No native run | Depends on the pressurisation unit selection (BLOCKED) |
| DOSING Dosing pot DP-01/02 connection | CHW+LTHW | — | No native run | No connection route in the design model; water-treatment specification NOT HELD |
| PUMP-HEAD Secondary pump duty points | CHW+LTHW | — | No native run | Head lower bound only (CHW 82.8 kPa, LTHW 40.2 kPa); fitting / plant losses and pump curves NOT HELD |
| FCU-COND-STACK FCU condensate discharge to the soil stack (tundish CD-E) | drainage | — | No native run | Tundish location and stack connection INPUT REQUIRED (public health) |