{
  "id": "component-service-life",
  "title": "Mitigation System Component and Service-Life Dataset",
  "description": "Every component of an active radon mitigation system: what it does, how it fails, whether failure is visible, and whether it is a wear item or permanent infrastructure.",
  "version": "1.0.0",
  "status": "published",
  "provenance": "editorial-taxonomy",
  "license": "CC BY 4.0 — reuse with attribution to Radon Connect and a link to the dataset page.",
  "published": "2026-07-29",
  "canonical": "https://radonconnect.com/datasets/component-service-life/",
  "schema": [
    {
      "key": "component",
      "label": "Component",
      "type": "string",
      "description": "Part of an active system."
    },
    {
      "key": "function",
      "label": "Function",
      "type": "string",
      "description": "What it does."
    },
    {
      "key": "classification",
      "label": "Classification",
      "type": "enum",
      "values": [
        "wear-item",
        "semi-permanent",
        "permanent"
      ],
      "description": "Wear items are expected to be replaced within the life of the system; permanent components are expected to outlast it."
    },
    {
      "key": "failureMode",
      "label": "Failure mode",
      "type": "string",
      "description": "How this component stops doing its job."
    },
    {
      "key": "failureVisible",
      "label": "Failure visible to owner",
      "type": "boolean",
      "description": "Whether an owner would notice without testing or inspection."
    },
    {
      "key": "detection",
      "label": "How to detect",
      "type": "string",
      "description": "What actually reveals the failure."
    }
  ],
  "methodology": {
    "question": "What is an active radon system made of, how does each part fail, and would an owner notice?",
    "construction": [
      "Components were enumerated from the scope a competent mitigation contract specifies.",
      "Classification uses three service-life classes rather than year ranges. Manufacturer warranty terms differ by model and we do not restate them as though they were a general service life.",
      "The visibility column exists because silent failure is the defining maintenance problem in this field."
    ],
    "inclusion": [
      "Components present in a standard active sub-slab or sub-membrane system.",
      "Optional monitoring hardware is described in the guides rather than treated as a standard component."
    ],
    "limitations": [
      "No expected lifespans in years are published. Those depend on model, duty, and environment, and a general figure would be an invented number.",
      "Failure modes are the common ones, not an exhaustive engineering list.",
      "Nothing here is a maintenance instruction. Fan, roof, and electrical work belong to a qualified professional."
    ]
  },
  "rowCount": 10,
  "rows": [
    {
      "component": "Fan",
      "function": "Develops the pressure difference that draws soil gas from beneath the slab.",
      "classification": "wear-item",
      "failureMode": "Bearing wear then motor stop. Warranted for a term of years, budgeted as a replaceable part after.",
      "failureVisible": false,
      "detection": "Manometer columns level; fan no longer audible. A fan-failure alarm shortens the window considerably."
    },
    {
      "component": "Manometer",
      "function": "Indicates that the system is developing suction.",
      "classification": "semi-permanent",
      "failureMode": "Fluid loss, or the gauge knocked out of level so it reads incorrectly.",
      "failureVisible": true,
      "detection": "Visual check against the mark made at commissioning."
    },
    {
      "component": "Suction pit and sub-slab connection",
      "function": "Couples the pipe to the aggregate layer beneath the slab.",
      "classification": "permanent",
      "failureMode": "Silt or debris intrusion reducing the draw area; rare.",
      "failureVisible": false,
      "detection": "Falling manometer reading with a confirmed working fan; diagnostics."
    },
    {
      "component": "Riser pipe",
      "function": "Carries soil gas from the suction point to above the roofline.",
      "classification": "permanent",
      "failureMode": "Joint separation or damage, most often during a basement renovation.",
      "failureVisible": true,
      "detection": "Visual inspection; loss of suction after building work."
    },
    {
      "component": "Roofline discharge",
      "function": "Releases exhausted soil gas where it disperses rather than re-entering.",
      "classification": "permanent",
      "failureMode": "Blockage by debris, nesting, or ice.",
      "failureVisible": false,
      "detection": "Manometer change without a fan fault; seasonal noise change."
    },
    {
      "component": "Sump lid seal",
      "function": "Closes what is often the largest single opening in a basement floor.",
      "classification": "semi-permanent",
      "failureMode": "Gasket degradation, or the lid left unsealed after pump service.",
      "failureVisible": true,
      "detection": "Visual check after any sump or drainage work."
    },
    {
      "component": "Floor-wall joint and crack sealing",
      "function": "Stops the fan pulling conditioned room air instead of soil gas.",
      "classification": "semi-permanent",
      "failureMode": "Sealant cracking with slab movement; sections covered by later finishing.",
      "failureVisible": true,
      "detection": "Visual inspection where accessible; a rising indoor result with the fan running."
    },
    {
      "component": "Crawl-space membrane",
      "function": "Takes the place of a slab so suction can be drawn beneath it.",
      "classification": "semi-permanent",
      "failureMode": "Tears from storage or trades access; seams or wall seals opening.",
      "failureVisible": true,
      "detection": "Inspection after anyone works in the crawl space."
    },
    {
      "component": "Dedicated electrical circuit",
      "function": "Powers continuous fan operation with a disconnect.",
      "classification": "permanent",
      "failureMode": "Tripped breaker, which stops the system silently.",
      "failureVisible": false,
      "detection": "Check the breaker first when the manometer reads level — it costs nothing."
    },
    {
      "component": "System label and documentation",
      "function": "Tells the next owner, inspector, or contractor what was installed.",
      "classification": "permanent",
      "failureMode": "Lost during ownership transfer.",
      "failureVisible": true,
      "detection": "Absent at resale, which turns a documented repair into an open question."
    }
  ]
}