{
  "scope": "Ten original synthetic equipment files. Existing documented date-code references are kept separate from manufacturer support and installation/warranty fields.",
  "evaluationDate": "2026-10-22",
  "cases": [
    {
      "id": "carrier-modern",
      "synthetic": true,
      "brand": "Carrier",
      "brandRoute": "/hvac/carrier/",
      "model": "Example model — not a part identifier",
      "serial": "5019X30312",
      "status": "matched",
      "dateCandidates": [
        {
          "date": "Week 50 of 2019",
          "ruleId": "week-year-prefix",
          "ruleLabel": "Week + year prefix",
          "explanation": "Characters 1–2 indicate production week 50; characters 3–4 indicate the two-digit year 19."
        }
      ],
      "ruleReference": {
        "label": "Inspector Handbook open reference data (CC BY 4.0)",
        "url": "https://inspectorhandbook.com/decoder-directory/manufacturers/carrier.json"
      },
      "manufacturerSupport": "https://www.carrier.com/residential/en/us/",
      "installationDate": null,
      "warrantyCoverage": null,
      "limitation": "Synthetic exercise for the documented rule family only. No field inspection, installation date, part fit or warranty decision follows from these examples."
    },
    {
      "id": "icp-family",
      "synthetic": true,
      "brand": "International Comfort Products",
      "brandRoute": "/hvac/icp/",
      "model": "Example model — not a part identifier",
      "serial": "E142320733",
      "status": "matched",
      "dateCandidates": [
        {
          "date": "Week 23 of 2014",
          "ruleId": "plant-year-week",
          "ruleLabel": "Plant + year + week",
          "explanation": "Character 1 is plant code E; characters 2–3 indicate year 14; characters 4–5 indicate week 23."
        }
      ],
      "ruleReference": {
        "label": "Inspector Handbook open reference data (CC BY 4.0)",
        "url": "https://inspectorhandbook.com/data"
      },
      "manufacturerSupport": "https://www.icpusa.com/",
      "installationDate": null,
      "warrantyCoverage": null,
      "limitation": "Synthetic exercise for the documented rule family only. No field inspection, installation date, part fit or warranty decision follows from these examples."
    },
    {
      "id": "heil-modern",
      "synthetic": true,
      "brand": "Heil",
      "brandRoute": "/hvac/heil/",
      "model": "Example model — not a part identifier",
      "serial": "E142320733",
      "status": "matched",
      "dateCandidates": [
        {
          "date": "Week 23 of 2014",
          "ruleId": "plant-year-week",
          "ruleLabel": "Plant + year + week",
          "explanation": "Character 1 is plant code E; characters 2–3 indicate year 14; characters 4–5 indicate week 23."
        }
      ],
      "ruleReference": {
        "label": "Inspector Handbook open reference data (CC BY 4.0)",
        "url": "https://inspectorhandbook.com/data"
      },
      "manufacturerSupport": "https://www.icpusa.com/",
      "installationDate": null,
      "warrantyCoverage": null,
      "limitation": "Synthetic exercise for the documented rule family only. No field inspection, installation date, part fit or warranty decision follows from these examples."
    },
    {
      "id": "goodman-month",
      "synthetic": true,
      "brand": "Goodman",
      "brandRoute": "/hvac/goodman/",
      "model": "Example model — not a part identifier",
      "serial": "0809123456",
      "status": "matched",
      "dateCandidates": [
        {
          "date": "September 2008",
          "ruleId": "year-month-prefix",
          "ruleLabel": "Year + month prefix",
          "explanation": "Characters 1–2 indicate year 08; characters 3–4 indicate month 09."
        }
      ],
      "ruleReference": {
        "label": "Inspector Handbook open reference data (CC BY 4.0)",
        "url": "https://inspectorhandbook.com/decoder-directory/manufacturers/goodman.json"
      },
      "manufacturerSupport": "https://www.goodmanmfg.com/",
      "installationDate": null,
      "warrantyCoverage": null,
      "limitation": "Synthetic exercise for the documented rule family only. No field inspection, installation date, part fit or warranty decision follows from these examples."
    },
    {
      "id": "lennox-july",
      "synthetic": true,
      "brand": "Lennox",
      "brandRoute": "/hvac/lennox/",
      "model": "Example model — not a part identifier",
      "serial": "5196G12345",
      "status": "matched",
      "dateCandidates": [
        {
          "date": "July 1996",
          "ruleId": "lennox-year-month-letter",
          "ruleLabel": "Lennox-family year + month letter",
          "explanation": "Characters 3–4 indicate year 96; character 5 (G) maps to July."
        }
      ],
      "ruleReference": {
        "label": "Inspector Handbook open reference data (CC BY 4.0)",
        "url": "https://inspectorhandbook.com/decoder-directory/manufacturers/lennox.json"
      },
      "manufacturerSupport": "https://www.lennox.com/residential/",
      "installationDate": null,
      "warrantyCoverage": null,
      "limitation": "Synthetic exercise for the documented rule family only. No field inspection, installation date, part fit or warranty decision follows from these examples."
    },
    {
      "id": "lennox-march",
      "synthetic": true,
      "brand": "Lennox",
      "brandRoute": "/hvac/lennox/",
      "model": "Example model — not a part identifier",
      "serial": "5196C12345",
      "status": "matched",
      "dateCandidates": [
        {
          "date": "March 1996",
          "ruleId": "lennox-year-month-letter",
          "ruleLabel": "Lennox-family year + month letter",
          "explanation": "Characters 3–4 indicate year 96; character 5 (C) maps to March."
        }
      ],
      "ruleReference": {
        "label": "Inspector Handbook open reference data (CC BY 4.0)",
        "url": "https://inspectorhandbook.com/decoder-directory/manufacturers/lennox.json"
      },
      "manufacturerSupport": "https://www.lennox.com/residential/",
      "installationDate": null,
      "warrantyCoverage": null,
      "limitation": "Synthetic exercise for the documented rule family only. No field inspection, installation date, part fit or warranty decision follows from these examples."
    },
    {
      "id": "ao-smith-week",
      "synthetic": true,
      "brand": "A. O. Smith",
      "brandRoute": "/water-heaters/ao-smith/",
      "model": "Example model — not a part identifier",
      "serial": "0950A12345",
      "status": "matched",
      "dateCandidates": [
        {
          "date": "Week 50 of 2009",
          "ruleId": "year-week-prefix",
          "ruleLabel": "Year + week prefix",
          "explanation": "Characters 1–2 indicate year 09; characters 3–4 indicate production week 50."
        }
      ],
      "ruleReference": {
        "label": "Inspector Handbook open reference data (CC BY 4.0)",
        "url": "https://inspectorhandbook.com/decoder-directory/manufacturers/aosmith.json"
      },
      "manufacturerSupport": "https://www.hotwater.com/",
      "installationDate": null,
      "warrantyCoverage": null,
      "limitation": "Synthetic exercise for the documented rule family only. No field inspection, installation date, part fit or warranty decision follows from these examples."
    },
    {
      "id": "bradford-cycle",
      "synthetic": true,
      "brand": "Bradford White",
      "brandRoute": "/water-heaters/bradford-white/",
      "model": "Example model — not a part identifier",
      "serial": "PB47429651",
      "status": "ambiguous",
      "dateCandidates": [
        {
          "date": "February 2017",
          "ruleId": "bradford-white-letters",
          "ruleLabel": "Bradford White repeating letter code",
          "explanation": "Character 1 (P) is a year code that repeats every 20 years; character 2 (B) maps to February."
        },
        {
          "date": "February 1997",
          "ruleId": "bradford-white-letters",
          "ruleLabel": "Bradford White repeating letter code",
          "explanation": "Character 1 (P) is a year code that repeats every 20 years; character 2 (B) maps to February."
        }
      ],
      "ruleReference": {
        "label": "Inspector Handbook open reference data (CC BY 4.0)",
        "url": "https://inspectorhandbook.com/decoder-directory/manufacturers/bradford-white.json"
      },
      "manufacturerSupport": "https://www.bradfordwhite.com/",
      "installationDate": null,
      "warrantyCoverage": null,
      "limitation": "Synthetic exercise for the documented rule family only. No field inspection, installation date, part fit or warranty decision follows from these examples."
    },
    {
      "id": "rheem-alternatives",
      "synthetic": true,
      "brand": "Rheem HVAC",
      "brandRoute": "/hvac/rheem/",
      "model": "Example model — not a part identifier",
      "serial": "1204D01234",
      "status": "ambiguous",
      "dateCandidates": [
        {
          "date": "December 2004",
          "ruleId": "rheem-month-or-week-year",
          "ruleLabel": "Rheem-family month + year",
          "explanation": "Characters 1–2 indicate month 12; the next two indicate year 04."
        },
        {
          "date": "Week 12 of 2004",
          "ruleId": "rheem-month-or-week-year",
          "ruleLabel": "Possible Rheem-family week + year",
          "explanation": "Some product families use the same digits as production week 12 and year 04. Confirm the equipment family on the rating plate."
        }
      ],
      "ruleReference": {
        "label": "Inspector Handbook open reference data (CC BY 4.0)",
        "url": "https://inspectorhandbook.com/decoder-directory/manufacturers/rheem.json"
      },
      "manufacturerSupport": "https://www.rheem.com/",
      "installationDate": null,
      "warrantyCoverage": null,
      "limitation": "Synthetic exercise for the documented rule family only. No field inspection, installation date, part fit or warranty decision follows from these examples."
    },
    {
      "id": "york-year-letter",
      "synthetic": true,
      "brand": "York",
      "brandRoute": "/hvac/york/",
      "model": "Example model — not a part identifier",
      "serial": "W0K5896070",
      "status": "matched",
      "dateCandidates": [
        {
          "date": "October 2005",
          "ruleId": "york-split-year-month",
          "ruleLabel": "Split year + month letter",
          "explanation": "Characters 2 and 4 combine to year 05; character 3 (K) maps to October."
        }
      ],
      "ruleReference": {
        "label": "Inspector Handbook open reference data (CC BY 4.0)",
        "url": "https://inspectorhandbook.com/decoder-directory/manufacturers/york.json"
      },
      "manufacturerSupport": "https://www.york.com/residential-equipment/",
      "installationDate": null,
      "warrantyCoverage": null,
      "limitation": "Synthetic exercise for the documented rule family only. No field inspection, installation date, part fit or warranty decision follows from these examples."
    }
  ]
}