# LDD-21 · Laundry / Operations Core

> **Status:** 🟢 LOCKED.

## One-line intent

The operational engine — not a residential laundry, a back-of-house system that absorbs daily household friction.

## Why this matters

Most homes have a laundry closet. This building has an operations core because the program — ILS + 2 baths + workshop + LOW + gym — generates a lot of stuff to wash, fold, store, and route. The decision to size laundry as infrastructure-scale, not residential-scale, is correct.

## Locked decisions

**Role**

- Back-of-house systems hub
- **Not optional**, not residential-style

**Requirements**

- 2 washer / dryer sets
- Folding space
- Storage

## Open items / requires engineer review

- **Laundry equipment spec** — high-efficiency front-load? Heat-pump dryer (no vent, slow)? Vented dryer (faster, energy-loss)?
- **Sink** — utility sink for hand-wash, treatment, stain removal.
- **Drying rack / line space** — for items that can't go in dryer.
- **Ironing station** — built-in or freestanding?
- **Storage spec** — linen, paper goods, cleaning supplies, vacuum, etc.
- **Adjacent main electrical panel** location (per LDD-09) — coordinate physical footprint with mech equipment.
- **Floor drain** — required for code in most jurisdictions with laundry; also catches the inevitable washer hose failure.
- **Dryer venting strategy** — heat-pump dryers don't vent (good for tight envelope), vented dryers compete with the kitchen vent for make-up air.
- **Acoustic isolation from living wing** — washers vibrate, dryers tumble. Wall assembly matters if laundry is adjacent to a quiet zone.

## Cross-references

- ← [LDD-09 electrical](09-electrical.md) — main panel sites here.
- ← [LDD-10 plumbing](10-plumbing.md) — middle plumbing cluster upper level includes laundry.
- ← [LDD-05 HVAC](05-hvac-system.md) — dryer venting + room ventilation.
- → [LDD-18 interior materials](18-interior-materials.md) — durable, cleanable wall + floor.

## Cost drivers

- **2 washer/dryer sets** (mid-spec front-load + heat-pump dryer): $5–10K (2 × $2.5–5K).
- **Built-in cabinetry, folding counter, storage**: $8–18K.
- **Utility sink + plumbing**: $1.5–3K.
- **Floor drain + waterproof flooring**: $0.5–1.5K.
- **Electrical (220V dryer × 2, 220V or 110V washer × 2, dedicated circuits)**: included in LDD-09.

**Likely-case rollup: $15–35K for the laundry/ops core**, folded into finish line.

## Air-gap concerns

1. **Two washer/dryer sets is generous.** Verify it's used. If half-used, half the space could be reclaimed for storage. But for a 50-year build with ILS + multiple bedrooms, redundancy is fair.
2. **Heat-pump dryer vs vented.** Heat-pump dryers are slow (90+ min cycles) but seal-tight (no envelope penetration). Vented dryers are fast (45 min) but pull warm conditioned air out of the building. For a high-performance envelope, heat-pump is the right call but means longer cycles + 2 dryers running in parallel during heavy days.
3. **Floor drain location matters.** Drain at the low point — front of washers — catches hose failures. Drain near the dryer doesn't help.
4. **Adjacent main panel + utility sink + washers in same room is a code item.** GFCI required, panel clearance required (typically 30" wide × 36" deep clear in front), no panel directly over a sink. Verify clearances.
5. **Folding counter height matters.** 36"–38" comfortable for standing fold; lower for sitting. Spec it.

## Diagram

(no dedicated SVG — this is on the upper floor middle plumbing cluster, see [plumbing clusters](../../diagrams/06-plumbing-clusters.svg).)

## Status

🟢 **Green — sized correctly for the program.** Lock equipment spec (heat-pump vs vented dryer) before plumbing rough-in.