{
  "tables": {
    "surface_thermal_transmittance": {
      "data_type": "table",
      "notes": "Requires hdd to be defined to be evaluated in code. Never have ground windows or doors.",
      "refs": [
        "NECB2011_S_3.2.2.2",
        "NECB2011_S_3.2.2.3",
        "NECB2011_S_3.2.2.4",
        "NECB2011_S_3.2.3.1"
      ],
      "units": "W_per_m2_K",
      "table": [
        {
          "boundary_condition": "Outdoors",
          "surface": "Wall",
          "formula": "( hdd < 3000) ? 0.315 : ( hdd < 4000) ? 0.278 : ( hdd < 5000 ) ? 0.247 : ( hdd < 6000) ? 0.210 :( hdd < 7000) ? 0.210 : 0.183"
        },
        {
          "boundary_condition": "Outdoors",
          "surface": "RoofCeiling",
          "formula": "( hdd < 3000) ? 0.227 : ( hdd < 4000) ? 0.183 : ( hdd < 5000 ) ? 0.183 : ( hdd < 6000) ? 0.162 :( hdd < 7000) ? 0.162 : 0.142"
        },
        {
          "boundary_condition": "Outdoors",
          "surface": "Floor",
          "formula": "( hdd < 3000) ? 0.227 : ( hdd < 4000) ? 0.183 : ( hdd < 5000 ) ? 0.183 : ( hdd < 6000) ? 0.162 :( hdd < 7000) ? 0.162 : 0.142"
        },
        {
          "boundary_condition": "Outdoors",
          "surface": "Window",
          "formula": "( hdd < 3000) ? 2.400 : ( hdd < 7000) ? 2.200 : 1.600"
        },
        {
          "boundary_condition": "Outdoors",
          "surface": "Door",
          "formula": "( hdd < 3000) ? 2.400 : ( hdd < 7000) ? 2.200 : 1.600"
        },
        {
          "boundary_condition": "Ground",
          "surface": "Wall",
          "formula": "( hdd < 3000) ? 0.568 : ( hdd < 4000) ? 0.379 : ( hdd < 7000) ? 0.284 : 0.210"
        },
        {
          "boundary_condition": "Ground",
          "surface": "RoofCeiling",
          "formula": "( hdd < 3000) ? 0.568 : ( hdd < 4000) ? 0.379 : ( hdd < 7000) ? 0.284 : 0.210"
        },
        {
          "boundary_condition": "Ground",
          "surface": "Floor",
          "formula": "( hdd < 7000) ? 0.757 : 0.379"
        }
      ]
    }
  }
}