{
  "category": "Duct & Fittings",
  "vertical": "hvacr",
  "source": "https://getclaro.ai/resources/attribute-library/hvacr/duct-fittings/",
  "status": "editorial-draft",
  "note": "Editorial reference template. Example values show format only and do not describe a real SKU. Not an official ETIM or ECLASS class.",
  "groups": [
    {
      "key": "identity",
      "name": "Identity",
      "check": "Preserve leading zeros and punctuation, validate against the manufacturer record, and check the GTIN check digit and packaging level before linking."
    },
    {
      "key": "technical",
      "name": "Technical specifications",
      "check": "Store the number and unit separately. Convert only when the source unit and test conditions are known."
    },
    {
      "key": "selection",
      "name": "Selection attributes",
      "check": "Map supplier wording to a governed vocabulary only after checking the source text and which variant it applies to."
    },
    {
      "key": "fit",
      "name": "Fit & compatibility",
      "check": "Keep model and series qualifiers. A similar-looking part is not a verified fit until a source says so."
    },
    {
      "key": "evidence",
      "name": "Evidence & compliance",
      "check": "Link the manufacturer document or label with its edition or date. Never copy a certification from a neighboring SKU."
    }
  ],
  "fields": [
    {
      "key": "manufacturer_part_number",
      "label": "Manufacturer Part Number",
      "group": "identity",
      "priority": "core",
      "value_type": "identifier",
      "unit": null,
      "example_format": "SWR-0826-60"
    },
    {
      "key": "gtin_upc",
      "label": "GTIN / UPC",
      "group": "identity",
      "priority": "core",
      "value_type": "identifier",
      "unit": null,
      "example_format": "012345082665"
    },
    {
      "key": "fitting_type",
      "label": "Fitting Type",
      "group": "selection",
      "priority": "core",
      "value_type": "controlled",
      "unit": null,
      "example_format": "90° elbow, 5-gore adjustable"
    },
    {
      "key": "duct_shape",
      "label": "Duct Shape",
      "group": "selection",
      "priority": "core",
      "value_type": "controlled",
      "unit": null,
      "example_format": "Round"
    },
    {
      "key": "nominal_diameter",
      "label": "Nominal Diameter",
      "group": "technical",
      "priority": "core",
      "value_type": "number",
      "unit": "in",
      "example_format": "8"
    },
    {
      "key": "material",
      "label": "Material",
      "group": "selection",
      "priority": "core",
      "value_type": "controlled",
      "unit": null,
      "example_format": "Galvanized steel"
    },
    {
      "key": "metal_thickness_gauge",
      "label": "Metal Thickness (Gauge)",
      "group": "technical",
      "priority": "core",
      "value_type": "controlled",
      "unit": "ga",
      "example_format": "26 ga (0.0217 in nominal)"
    },
    {
      "key": "wall_construction",
      "label": "Wall Construction",
      "group": "selection",
      "priority": "core",
      "value_type": "controlled",
      "unit": null,
      "example_format": "Single-wall"
    },
    {
      "key": "end_connection_type",
      "label": "End Connection Type",
      "group": "fit",
      "priority": "core",
      "value_type": "controlled",
      "unit": null,
      "example_format": "Crimped one end / plain one end"
    },
    {
      "key": "nominal_length",
      "label": "Nominal Length",
      "group": "technical",
      "priority": "core",
      "value_type": "number",
      "unit": "in",
      "example_format": "60 (straight pipe)"
    },
    {
      "key": "branch_outlet_diameter",
      "label": "Branch / Outlet Diameter",
      "group": "fit",
      "priority": "differentiating",
      "value_type": "number",
      "unit": "in",
      "example_format": "6"
    },
    {
      "key": "elbow_angle",
      "label": "Elbow Angle",
      "group": "selection",
      "priority": "differentiating",
      "value_type": "number",
      "unit": "°",
      "example_format": "90"
    },
    {
      "key": "zinc_coating_designation",
      "label": "Zinc Coating Designation",
      "group": "selection",
      "priority": "differentiating",
      "value_type": "controlled",
      "unit": null,
      "example_format": "G90"
    },
    {
      "key": "pressure_class",
      "label": "Pressure Class",
      "group": "technical",
      "priority": "differentiating",
      "value_type": "text",
      "unit": "in w.g.",
      "example_format": "±2 in w.g."
    },
    {
      "key": "insulation_r_value",
      "label": "Insulation R-Value",
      "group": "technical",
      "priority": "differentiating",
      "value_type": "number",
      "unit": "h·ft²·°F/Btu",
      "example_format": "6.0"
    },
    {
      "key": "seam_construction",
      "label": "Seam Construction",
      "group": "selection",
      "priority": "differentiating",
      "value_type": "controlled",
      "unit": null,
      "example_format": "Spiral lockseam"
    },
    {
      "key": "ul_181_listing",
      "label": "UL 181 Listing (Flexible Duct / Duct Board)",
      "group": "evidence",
      "priority": "channel",
      "value_type": "controlled",
      "unit": null,
      "example_format": "UL 181 Class 1 air duct"
    },
    {
      "key": "country_of_origin",
      "label": "Country of Origin",
      "group": "evidence",
      "priority": "channel",
      "value_type": "controlled",
      "unit": null,
      "example_format": "United States"
    }
  ],
  "evidence_columns": [
    "raw_value",
    "normalized_value",
    "source_uri",
    "source_page_or_row",
    "confidence",
    "review_state",
    "last_verified"
  ],
  "normalization_examples": [
    {
      "attribute": "Metal Thickness (Gauge)",
      "variants": [
        "26 GA",
        "26ga",
        "26 Gauge",
        "#26",
        "0.0217\"",
        "0.55 mm"
      ],
      "normalized": "26 ga galvanized (0.0217 in nominal)"
    },
    {
      "attribute": "Material",
      "variants": [
        "GALV",
        "Galv. Steel",
        "Galvanized",
        "Hot Dipped Galv",
        "Zinc Coated Steel",
        "GI"
      ],
      "normalized": "Galvanized steel"
    },
    {
      "attribute": "Pressure Class",
      "variants": [
        "2\" WG",
        "2 in. w.g.",
        "+2/-2 SP",
        "2\" W.C.",
        "500 Pa",
        "±2 in wc"
      ],
      "normalized": "±2 in w.g."
    }
  ]
}