@maintainable.xyz/house-spec
The open specification for building maximally maintainable, healthy homes.
What This Is
A complete, opinionated building specification for a Baufritz timber-frame house engineered around clean-room-level indoor air quality, laboratory-grade water purity, self-hosted infrastructure, and lifetime maintainability. Every system — air filtration, water treatment, heating, flooring, plumbing, datacenter — is designed so that components can be inspected, serviced, and replaced without destructive intervention.
Specification Documents
| Spec | Scope |
|---|---|
| 01 — Air System | H13 HEPA whole-house filtration, MVHR, steam humidification, duct design, pressure management |
| 02 — Sensors & Automation | Per-room air quality sensors, KNX/Zigbee architecture, Home Assistant integration, demand-controlled ventilation |
| 03 — Baufritz Coordination | Technical room, duct routing, airtightness, radon protection, construction checkpoints |
| 04 — Flooring & Ceiling | Lindner NORTEC Doppelboden raised floor, WOODline parquet, Plafotherm AirHybrid radiant ceiling |
| 05 — Water System | POE reverse osmosis, 316L stainless steel plumbing, ceiling-routed distribution, leak detection |
| 06 — Home Datacenter | Cellar, 4x 42U racks, closed-loop cooling, heat recovery, goods elevator, UPS, structured cabling |
Key Design Principles
- Whole-house H13 HEPA — 99.95% particle capture at 0.3 um, ISO Class 7-8 equivalent
- Every air parameter controlled — particulates, CO2, VOCs, humidity, temperature, pressure, radon
- Heating via ceiling (Plafotherm AirHybrid), not floor — fast response, furniture-independent, integrates MVHR supply air
- Raised access floor (Lindner NORTEC Doppelboden) — individually liftable 600x600 mm panels for full access to services underneath
- Dry construction throughout — no wet trades, ideal for Baufritz timber-frame
- Whole-house POE reverse osmosis — 95-99% TDS removal, remineralized, UV-sterilized, PFAS/microplastic-free
- 316L stainless steel plumbing — food-grade, zero leaching, press-fit, routed accessibly under suspended ceiling
- Home datacenter in cellar — 4x 42U racks, 10 kW closed-loop cooling, N+1 redundancy, heat recovery heats the house in winter
- Goods elevator — 1000 kg capacity, cellar to ground floor, handles fully loaded server racks
- Positive pressure (+3-5 Pa) — unfiltered air never enters the building envelope
PDF Build
The specs can be compiled into a single styled PDF with rendered Mermaid diagrams:
pnpm install
pnpm build
# Output: dist/house-spec.pdf
Requires Chromium (installed automatically via Puppeteer).
License
All rights reserved. Copyright maintainable.xyz.