LDD-15 · Mechanical Room
One-line intent
Organized systems, partially revealed — the room is the project's mechanical infrastructure read as architectural feature.Locked decisions
- Size: 10' × 7' (70 sqft)
- Door: smoked glass — controlled visibility
Zones
| Zone | Function |
|---|---|
| North | Radiant manifold (visual wall) |
| South | Tanks + sink |
| East | Electrical + battery |
| Center | Working space (service access) |
Open items / engineer review
- Is 70 sqft enough? Full equipment list: central radiant manifold + boiler/heat pump + buffer tank + expansion + circ pumps + water heater + softener + filtration + electrical subpanels + LV drivers + battery + working space. Tight.
- HPWH location — needs ~700 cfm ambient air; cools small room
- Buffer tank takes 8–12 sqft
- Battery / UPS spec — solar battery? UPS? Define
- Mech room ventilation
- Floor drain in mech room (for inevitable leak)
Cost drivers
Smoked glass door $2–6K · Mech room finishes $2–5K · Floor drain + sink $1.5–3K · Ventilation $0.5–1.5K. Total: $5–15K (room only; equipment in respective LDDs).Air-gap concerns
- 70 sqft is genuinely tight. Typical equivalent room is 80–120 sqft. Recommend bumping to ≥90 sqft (10'×9' or 12'×7.5') before structure is set.
- HPWH in small mech room loses efficiency — vent ducts to larger space or pick different water heater.
- Smoked glass door + visible infrastructure = real commitment. Every label/cable tie/pipe stub matters.
- Battery code + safety implications — Powerwall/Enphase need fire separation + ventilation per code.
- Floor drain coordination with under-slab plumbing.
- Single mech room may be insufficient — north + south alcoves implied by 3-cluster strategy but not explicit.
Cross-references
→ Outputs to
LDD-06 local south service branch from hereDiagram
Mech room hosts the central manifold cluster (the largest of the three).