{
  "category": "Air Filters",
  "vertical": "hvacr",
  "source": "https://getclaro.ai/resources/attribute-library/hvacr/air-filters/",
  "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": "PF-20251-M10"
    },
    {
      "key": "gtin_upc",
      "label": "GTIN / UPC",
      "group": "identity",
      "priority": "core",
      "value_type": "identifier",
      "unit": null,
      "example_format": "012345202513"
    },
    {
      "key": "pack_quantity_filters_per_case",
      "label": "Pack Quantity (Filters per Case)",
      "group": "identity",
      "priority": "core",
      "value_type": "number",
      "unit": null,
      "example_format": "12"
    },
    {
      "key": "filter_type",
      "label": "Filter Type",
      "group": "selection",
      "priority": "core",
      "value_type": "controlled",
      "unit": null,
      "example_format": "Pleated panel"
    },
    {
      "key": "nominal_filter_size_w_x_h_x_d",
      "label": "Nominal Filter Size (W x H x D)",
      "group": "fit",
      "priority": "core",
      "value_type": "text",
      "unit": "in",
      "example_format": "20 x 25 x 1"
    },
    {
      "key": "actual_filter_size_w_x_h_x_d",
      "label": "Actual Filter Size (W x H x D)",
      "group": "technical",
      "priority": "core",
      "value_type": "text",
      "unit": "in",
      "example_format": "19-1/2 x 24-1/2 x 7/8"
    },
    {
      "key": "merv_rating",
      "label": "MERV Rating",
      "group": "technical",
      "priority": "core",
      "value_type": "number",
      "unit": null,
      "example_format": "10"
    },
    {
      "key": "media_type",
      "label": "Media Type",
      "group": "selection",
      "priority": "core",
      "value_type": "controlled",
      "unit": null,
      "example_format": "Synthetic electret"
    },
    {
      "key": "frame_material",
      "label": "Frame Material",
      "group": "selection",
      "priority": "core",
      "value_type": "controlled",
      "unit": null,
      "example_format": "Coated beverage board"
    },
    {
      "key": "country_of_origin",
      "label": "Country of Origin",
      "group": "evidence",
      "priority": "core",
      "value_type": "controlled",
      "unit": null,
      "example_format": "United States"
    },
    {
      "key": "rated_airflow",
      "label": "Rated Airflow",
      "group": "technical",
      "priority": "differentiating",
      "value_type": "number",
      "unit": "CFM",
      "example_format": "1,040 CFM at 300 fpm"
    },
    {
      "key": "initial_resistance",
      "label": "Initial Resistance",
      "group": "technical",
      "priority": "differentiating",
      "value_type": "number",
      "unit": "in w.g.",
      "example_format": "0.21 in w.g. at 300 fpm"
    },
    {
      "key": "recommended_final_resistance",
      "label": "Recommended Final Resistance",
      "group": "technical",
      "priority": "differentiating",
      "value_type": "number",
      "unit": "in w.g.",
      "example_format": "1.0 in w.g."
    },
    {
      "key": "dust_holding_capacity",
      "label": "Dust Holding Capacity",
      "group": "technical",
      "priority": "differentiating",
      "value_type": "number",
      "unit": "g",
      "example_format": "45 g at 300 fpm (ASHRAE 52.2 loading dust)"
    },
    {
      "key": "effective_media_area",
      "label": "Effective Media Area",
      "group": "technical",
      "priority": "differentiating",
      "value_type": "number",
      "unit": "ft²",
      "example_format": "5.2 ft²"
    },
    {
      "key": "equipment_cross_reference",
      "label": "Equipment Cross-Reference",
      "group": "fit",
      "priority": "differentiating",
      "value_type": "text",
      "unit": null,
      "example_format": "Replaces OEM filter FLT-2025-OEM in listed furnace models"
    },
    {
      "key": "ul_900_classification",
      "label": "UL 900 Classification",
      "group": "evidence",
      "priority": "channel",
      "value_type": "controlled",
      "unit": null,
      "example_format": "UL 900 Classified"
    },
    {
      "key": "iso_16890_class",
      "label": "ISO 16890 Class",
      "group": "evidence",
      "priority": "channel",
      "value_type": "controlled",
      "unit": null,
      "example_format": "ISO ePM10 50%"
    }
  ],
  "evidence_columns": [
    "raw_value",
    "normalized_value",
    "source_uri",
    "source_page_or_row",
    "confidence",
    "review_state",
    "last_verified"
  ],
  "normalization_examples": [
    {
      "attribute": "Nominal Filter Size",
      "variants": [
        "20x25x1",
        "20 x 25 x 1",
        "20\" x 25\" x 1\"",
        "25x20x1",
        "20X25X1 in.",
        "20 by 25 by 1"
      ],
      "normalized": "20 x 25 x 1 in"
    },
    {
      "attribute": "MERV Rating",
      "variants": [
        "MERV 13",
        "MERV-13",
        "Merv13",
        "M13",
        "13 MERV",
        "MERV13 (ASHRAE 52.2)"
      ],
      "normalized": "MERV 13"
    },
    {
      "attribute": "Frame Material",
      "variants": [
        "beverage board",
        "bev board",
        "Bev. Board",
        "coated beverage board",
        "moisture-resistant beverage board"
      ],
      "normalized": "Coated beverage board"
    }
  ]
}