{ "kind": "bimfit_building_energy_dataset", "schemaVersion": "2.0.0", "changelogUrl": "/reference-buildings/CHANGELOG.md", "id": "smiley-west", "scope": "published_baseline", "isMetered": false, "meteredEnergy": null, "calibration": { "status": "not_calibrated", "observations": null }, "building": { "name": { "ko": "스마일리 웨스트", "en": "Smiley West" }, "summary": { "ko": "KIT IAI가 공개한 연립주택 검증 모델. 실제 부지의 건물이 아닌 IFC 검증용 설계입니다.", "en": "KIT IAI's fictional terraced-house example, released for IFC validation; not a surveyed building." }, "useType": "apartment_building", "modelContext": { "classification": "synthetic_example", "basis": "The publisher describes Smiley West as terraced houses for IFC validation; this is not an occupied building record.", "sourceUrl": "https://www.ifcwiki.org/index.php?title=KIT_IFC_Examples" }, "location": { "verifiedCoordinates": null, "ifcDeclaredLatitudeDeg": 49.0332445, "ifcDeclaredLongitudeDeg": 8.390979999999999, "locationIsAuthoringDefault": true, "note": "KIT publishes Smiley West as a terraced-house validation example. IfcSite coordinates are not treated as a surveyed energy climate; the page uses a separately named Seoul climate assumption." }, "modelCounts": { "storeys": 4, "spacesTotal": 140, "spacesFloor": 140, "assemblies": 10, "externalElements": 0, "exteriorWalls": 158, "windows": 80, "exteriorCurtainWalls": 0, "exteriorDoors": 66, "externalElementsNote": "554 external physical space boundaries exist and none resolved: swept curve is not a readable polyline. The classifier reads IfcSurfaceOfLinearExtrusion (Revit); this file's boundaries are another surface type. Envelope areas here come from stated wall NetSideArea or solid geometry. Exterior wall membership uses the boundary's element reference and PHYSICAL/EXTERNAL flags directly; it does not require a readable boundary surface or consume its area." } }, "source": { "sourceUrl": "https://www.ifcwiki.org/index.php?title=KIT_IFC_Examples", "licenceAsDeclared": "KIT/IAI unrestricted use (attribution required)", "attribution": "Institute for Automation and Applied Informatics (IAI), Karlsruhe Institute of Technology (KIT), \"AC-20-Smiley-West-10-Bldg\" — https://www.ifcwiki.org/index.php?title=KIT_IFC_Examples", "attributionStatus": "stated", "files": [ { "role": "architectural", "fileName": "AC-20-Smiley-West-10-Bldg.ifc", "sha256": "26734e67bdc0fd2ab30cb560bddc279a0a4f23eb4d28861509524e4bbe201c48", "byteLength": 6109213, "units": { "lengthToMetres": 1, "areaToSquareMetres": 1, "lengthUnitName": "METRE", "areaUnitName": "SQUARE_METRE", "lengthAssumed": false, "areaAssumed": false } } ], "extractedAt": "2026-09-17T00:00:00.000Z", "manifestUrl": "/reference-buildings/smiley-west/manifest.json", "statedPhysics": null, "transformations": "IFC quantities/solids extracted by build-reference-building; baseline inputs adapted by reference-buildings/energy-inputs; screening outputs computed at export." }, "modelGeometry": { "artifactBaseUrl": "/reference-buildings/smiley-west/", "architecturalDetails": { "id": "details", "ko": "건축 상세", "en": "Architectural details", "file": "architectural-details.glb", "byteLength": 122512, "sha256": "cd5025223b3c5999c25c06606e5545b5375e0ce061ab34330f723951b0b39ab2", "triangleCount": 140, "placedTriangleCount": 31160, "triangleCountBasis": "triangleCount stores each instanced shape once; placedTriangleCount includes every placement", "groups": [ "beam", "railing" ], "elements": 130, "distinctGeometries": 9, "instancedShapes": 9, "instancedPlacements": 2570, "drawCalls": 9, "materials": 2, "sourceFiles": [ { "role": "architectural", "fileName": "AC-20-Smiley-West-10-Bldg.ifc", "sha256": "26734e67bdc0fd2ab30cb560bddc279a0a4f23eb4d28861509524e4bbe201c48", "types": [ { "type": "IfcBeam", "candidates": 10, "rendered": 10, "withoutRenderedMesh": 0 }, { "type": "IfcRailing", "candidates": 120, "rendered": 120, "withoutRenderedMesh": 0 } ] } ], "indexFile": "architectural-details-index.json", "indexSha256": "afcb6f870647a881cfe7fd79bc435ba41e9cdb318c9d1154ae69c3d3aabb48f8", "appearance": "web-ifc tessellator RGBA, including possible default styles; no inferred finish textures. Metalness 0 and roughness 0.85 are renderer assumptions, not measured material properties.", "note": "Selected source IFC entity classes omitted from the core fabric layer. Original tessellated geometry and placements; repeated shapes use GPU instancing. Not a claim of complete architectural or fabrication detail. Existing services remain separate." }, "materialFabric": null, "mepCoverage": { "schemaVersion": 1, "status": "no_typed_mep_occurrences", "publishedLayerIds": [], "typedElementCount": 0, "distributionPortCount": 0, "sources": [ { "role": "architectural", "fileName": "AC-20-Smiley-West-10-Bldg.ifc", "sha256": "26734e67bdc0fd2ab30cb560bddc279a0a4f23eb4d28861509524e4bbe201c48", "schema": "IFC4", "typedElementCount": 0, "entitiesByType": {}, "distributionPorts": 0, "systems": 0 } ], "summary": { "ko": "제공된 IFC에는 분류된 MEP 요소와 배관·덕트 포트가 없습니다. 일반 가구·프록시는 설비로 추정하지 않습니다.", "en": "The supplied IFC contains no typed MEP elements or distribution ports. Generic furniture and proxies are not interpreted as services." }, "limitations": [ { "ko": "해시로 고정된 IFC 파일에서 해당 스키마의 설비 분류 상속을 확인한 요소 목록이며, 실제 설치 설비의 완전성 조사가 아닙니다.", "en": "Inventory of distribution occurrence classes using each pinned IFC file's schema inheritance, not a completeness survey of installed services." }, { "ko": "분야별·수정본 모델 간 요소가 중복될 수 있으며 파일 간 설비 중복 제거는 하지 않았습니다.", "en": "Counts include overlapping discipline and revision models; there is no cross-file equipment deduplication." }, { "ko": "일반 IfcBuildingElementProxy·IfcFurnishingElement는 원본 근거 없이 MEP로 분류하지 않습니다.", "en": "Generic IfcBuildingElementProxy and IfcFurnishingElement occurrences are not classified as MEP without source evidence." } ] }, "serviceLayers": [], "scope": "Source geometry and occurrence inventory only. Geometry does not establish installed thermal performance, system connectivity or operating efficiency; energy inputs are recorded separately." }, "measuredEnvelope": { "status": "extracted_with_scope_limits", "basis": "Measurements of model geometry and quantities; not on-site measurements.", "floorArea": { "value": 1877.51, "unit": "m2", "status": "measured_from_model", "sourceField": "areas.totalFloorAreaSqm", "scope": "Extracted model elements; completeness and physical as-built accuracy are not certified." }, "opaqueWallNetArea": { "value": 2387.18, "unit": "m2", "status": "measured_from_model", "sourceField": "areas.exteriorWallNetSqm", "scope": "Extracted model elements; completeness and physical as-built accuracy are not certified." }, "glazingApertureArea": { "value": 95.93, "unit": "m2", "status": "measured_from_model", "sourceField": "areas.glazingApertureSqm", "scope": "Counted openings selected by the extractor's host-wall and envelope rules; excluded and unresolved openings are not in this sum.", "coverage": "selected_opening_scope_not_certified_complete" }, "exteriorDoorArea": { "value": 263.53, "unit": "m2", "status": "measured_from_model", "sourceField": "areas.exteriorDoorSqm", "scope": "Counted exterior door leaves selected by the extractor; not every IfcDoor or IsExternal flag.", "coverage": "selected_opening_scope_not_certified_complete" }, "roofElementSurfaceSum": { "value": 618.06, "unit": "m2", "status": "measured_from_model", "sourceField": "areas.roofSurfaceSqm", "scope": "Sum of each roof element's one-sheet surface; different roof layers/elements may overlap. Not the selected outer-envelope roof area used by the energy model." }, "roofFamilyProjectedSum": { "value": 613.01, "unit": "m2", "status": "measured_from_model", "sourceField": "areas.roofProjectedSqm", "scope": "Sum of plan unions by roof family; different families may overlap. Not a single union across the building." }, "roofPlanUnion": { "value": 613.01, "unit": "m2", "status": "measured_from_model", "sourceField": "areas.roofUnionSqm", "scope": "One plan union across all counted roof elements, irrespective of family." }, "groundContactArea": { "value": 516.52, "unit": "m2", "status": "measured_from_model", "sourceField": "areas.groundSlabSqm", "scope": "Extracted model elements; completeness and physical as-built accuracy are not certified." }, "groundExposedPerimeter": { "value": 287.7, "unit": "m", "status": "measured_from_model", "sourceField": "areas.groundPerimeterM", "scope": "Outer ring length of the selected slab union. Slab gaps/fragmentation can increase it; this is not independently verified thermal exposure. Read the ground-coupling assumption." }, "conditionedGrossVolume": { "value": 5042.91, "unit": "m3", "status": "measured_from_model", "sourceField": "areas.conditionedVolumeGrossM3", "scope": "Extracted model elements; completeness and physical as-built accuracy are not certified." }, "netRoomVolume": { "value": 4704.88, "unit": "m3", "status": "measured_from_model", "sourceField": "areas.roomVolumeNetM3", "scope": "Extracted model elements; completeness and physical as-built accuracy are not certified." }, "wallByOrientationSqm": { "N": 0, "NE": 601.3, "E": 0, "SE": 447.75, "S": 0, "SW": 734.29, "W": 0, "NW": 603.85 }, "glazingByOrientationSqm": { "N": 0, "NE": 0, "E": 0, "SE": 6.25, "S": 0, "SW": 0, "W": 0, "NW": 89.68 }, "doorsByOrientationSqm": { "N": 0, "NE": 0, "E": 0, "SE": 234.02, "S": 0, "SW": 0, "W": 0, "NW": 29.51 }, "orientation": { "trueNorthDeg": -147.5, "northAssumed": false, "weakOutwardCount": 8, "offCardinalCount": 158, "offCardinalSqm": 2387.18, "wallCount": 158, "note": "Azimuths are clockwise from north, where north is the model's -Z after web-ifc's Z-up to Y-up conversion. Outward face inferred by comparing each face's centroid with the building centre, which is correct for a convex plan and can be wrong at a re-entrant corner." }, "openingRecordsUrl": "/reference-buildings/smiley-west/openings.json", "extractionNotes": { "floor": null, "openings": "Glazing aperture 95.93 m² = 80 IfcWindow at OverallWidth × OverallHeight (95.93 m²). Exterior doors are separate — a door is aperture, not glazing: 66 IfcDoor, 263.53 m², OverallWidth × OverallHeight. Host wall by IfcRelFillsElement → IfcOpeningElement → IfcRelVoidsElement (146 openings). Sector is the host wall's, from the same orientation pass as the wall split. Envelope by a both-sides probe against the conditioned IfcSpace solids (140 of 140 have geometry); this file has no IfcCurtainWall; 104 openings hosted in walls outside the exterior set; nothing unresolved. IsExternal is reported per row and never used as a filter — it means \"not an interior partition\" to an authoring tool, never \"bounds conditioned space against outdoor air\". It marks 70 door(s) here; 66 confirm against an exterior wall, 4 do not: #113831 1OG-Balkon-4-1 4.18 m², #113896 1OG-Balkon-4-2 4.18 m², #114310 1OG-Balkon-3-1 4.18 m², #114375 1OG-Balkon-3-2 4.18 m². Rows in openings.json.", "roof": "Plan shadow per element (union of its projected triangles, ifc-plan-shadow.mjs): 20 elements — 20 IfcSlab.PredefinedType=ROOF. roofProjectedSqm sums 15 roof type(s), each as the union of its elements; the elements themselves sum to 613.01 m² (elements of one type overlapping in plan) and all types together cover 613.01 m² (one type above another). surfaceSqm is each element's true one-sheet surface (Σ area of its upward faces; ÷ 2 where a surface model has no downward face and both sheets are wound upward; ÷ the coverage where its parts cover its shadow more than once, as stacked layer solids do — surfaceBasis says which), summing to 618.06 m²; a flat deck's surface equals its shadow, a pitched roof's exceeds it. Roof geometry is read from the architectural IFC. Classification follows measured planes; no typology is invented.", "ground": "IfcSlab (not ROOF or LANDING) on storeys at or below KG (-2.81 m): 10 candidate(s). A slab counts as ground envelope when a conditioned space stands on it — its shadow overlaps a conditioned ground-storey space footprint (30 of 30 such spaces have one: 30 solid) or an IfcRelSpaceBoundary names it as bounding one. IsExternal is not consulted. 10 counted, 0 excluded. groundSlabSqm is the union of the counted shadows (they sum to 516.52 m²; stacked build-up layers count once); groundPerimeterM is the outline's outer rings (10 polygons).", "volume": "Gross from 140 spaces (floor area × storey height; voids, and rooms taller than their storey with no void above, as their own solids); net from 140 spaces (140 from stated volume quantity). A closed tessellation's signed volume is exact." }, "opaqueFacadeScope": null }, "modelInputs": { "provenance": "mixed_model_measurements_and_named_assumptions", "measurementState": "complete", "scopeNotice": { "ko": "KIT IAI의 연립주택 검증용 예제입니다. 실제 부지가 아닙니다. 외피 면적은 측정값이고 U값·기후·운영은 한국 2000–2009 공동주택 표입니다. 추정 MEP로 채우지 않았습니다.", "en": "KIT IAI fictional terraced-house validation example. Envelope areas are measured; U-values, climate and operation are Korean 2000–2009 apartment tables. No inferred MEP is added." }, "pendingMeasurements": [], "pendingMeasurementReconciliation": [], "recipe": { "facade": { "windowWidth": 1.4, "windowHeight": 1.6, "sillHeight": 0.8, "windowSpacing": 2.2, "windowRatio": 0.3, "mullionDepth": 0.06, "mullionWidth": 0.05, "glassInset": 0.03, "solidPanelChance": 0.15, "parapetHeight": 0.9, "cornerInset": 0.05 }, "slab": { "thickness": 0.2, "overhang": 0 }, "column": { "spacing": 6, "size": 0.4, "inset": 0 }, "roof": { "type": "flat", "flatThickness": 0.3, "gableHeight": 3, "hipInset": 0.4 }, "materials": { "wall": { "color": "#B8C0C8", "roughness": 0.9, "metalness": 0, "visualId": "paint-stucco" }, "glass": { "color": "#88BBDD", "roughness": 0.1, "metalness": 0.3, "transparent": true, "opacity": 0.4, "emissive": "#334455", "emissiveIntensity": 0.15, "visualId": "glass-tinted" }, "mullion": { "color": "#808890", "roughness": 0.4, "metalness": 0.6, "visualId": "metal-aluminum" }, "slab": { "color": "#A05030", "roughness": 0.9, "metalness": 0, "visualId": "concrete-polished" }, "column": { "color": "#A05030", "roughness": 0.9, "metalness": 0, "visualId": "concrete-precast" }, "roof": { "color": "#808080", "roughness": 0.8, "metalness": 0.1, "visualId": "roof-membrane" }, "groundFloor": { "color": "#A0A098", "roughness": 0.8, "metalness": 0.05, "visualId": "paint-stucco" } }, "buildingName": "Smiley West — fictional terraced-house example", "address": "No surveyed site (KIT validation example)", "mainPurpsCd": "02000", "strctCd": "21", "era": "2000-2009", "floors": [ { "floorNo": -1, "label": "KG", "type": "below", "y": -2.81, "height": 2.56, "isGroundFloor": false, "useCode": "02000" }, { "floorNo": 1, "label": "EG", "type": "above", "y": -0.25, "height": 2.78, "isGroundFloor": true, "useCode": "02000" }, { "floorNo": 2, "label": "1.OG", "type": "above", "y": 2.53, "height": 2.7, "isGroundFloor": false, "useCode": "02000" }, { "floorNo": 3, "label": "2.OG", "type": "above", "y": 5.23, "height": 2.7, "isGroundFloor": false, "useCode": "02000" } ], "totalHeight": 7.93, "wallThickness": 0.2, "footprintWidth": 22.727076362788065, "footprintDepth": 22.727076362788065, "siteWidth": 22.727076362788065, "siteDepth": 22.727076362788065, "officialFloorAreaSqm": 1877.51, "measuredEnvelope": { "planAreaSqm": 516.52, "wallLengthM": 287.7, "grossWallAreaSqm": 2746.65, "roofAreaSqm": 613.01, "volumeM3": 5042.91, "derivedFloorAreaSqm": 1877.51, "basis": "IFC: 140 stated IfcSpace floor quantities; 158 walls selected by IfcRelSpaceBoundary PHYSICAL/EXTERNAL, area from stated NetSideArea; 95.93 m² windows and 263.53 m² exterior doors at OverallWidth × OverallHeight; 516.52 m² ground-slab union; 613.01 m² roof plan (flat Dach-1…5 plus 12° entrance canopies). All 140 rooms are assumed conditioned. Thermal properties, climate and operation are assumptions." } }, "materials": { "source": "ifc-model", "confidence": "estimated", "codeYear": 2001, "envelope": { "walls": [ { "orientation": "N", "surfaceArea": 601.3, "uValue": 0.47, "rValue": 2.127659574468085, "thermalBridge": 0, "layers": [] }, { "orientation": "E", "surfaceArea": 447.75, "uValue": 0.47, "rValue": 2.127659574468085, "thermalBridge": 0, "layers": [] }, { "orientation": "S", "surfaceArea": 734.29, "uValue": 0.47, "rValue": 2.127659574468085, "thermalBridge": 0, "layers": [] }, { "orientation": "W", "surfaceArea": 603.85, "uValue": 0.47, "rValue": 2.127659574468085, "thermalBridge": 0, "layers": [] } ], "roof": { "uValue": 0.29, "layers": [], "solarReflectance": 0.3, "emissivity": 0.9, "greenRoofCoverage": 0 }, "groundFloor": { "uValue": 0.9016999398032483, "layers": [ { "name": "Stahlbeton 0.2 m (conductivity assumed)", "thickness": 0.2, "thermalConductivity": 2.3, "density": 2400, "specificHeat": 880 } ], "groundContactResistance": 0 }, "windows": { "uValue": 2.1, "shgc": 0.45, "vlt": 0.6, "glassType": "double", "coating": "low-e", "gasFill": "air", "frameMaterial": "thermal-break-aluminum", "airLeakageRate": 2, "shadingCoefficient": 0.5172413793103449, "windowToWallRatio": { "N": 0.03492618280450731, "E": 0.03492618280450731, "S": 0.03492618280450731, "W": 0.03492618280450731 } }, "foundation": { "perimeterInsulationUValue": 0, "groundTemperature": 13.5, "moistureBarrier": "none" }, "airtightness": { "ach50": 3.5, "equivalentLeakageArea": 0, "testMethod": "estimated" } }, "hvac": { "heating": { "systemType": "central", "fuelType": "gas", "efficiency": 0.85, "capacity": 0 }, "cooling": { "systemType": "split", "efficiency": 3.2, "capacity": 0 }, "ventilation": { "type": "natural", "heatRecoveryEfficiency": 0, "airflowRate": 0.5 }, "dhw": { "systemType": "gas-boiler", "efficiency": 0.85, "storageVolume": 0 } }, "lighting": { "lightingPowerDensity": 6, "lampType": "led", "controlType": "manual" }, "renewable": { "solarPV": { "installed": false, "capacity": 0, "panelType": "monocrystalline", "tiltAngle": 30, "orientation": 180, "area": 0 }, "solarThermal": { "installed": false, "collectorArea": 0, "efficiency": 0 }, "geothermal": { "installed": false, "systemType": "closed-loop", "cop": 0 } }, "occupancy": { "occupancyDensity": 0.04, "internalHeatGain": 3, "hotWaterDemand": 40, "weekdaySchedule": [ 0, 0, 0, 0, 0, 0, 0.2, 0.5, 0.7, 0.5, 0.4, 0.4, 0.5, 0.4, 0.4, 0.5, 0.7, 0.9, 1, 0.9, 0.7, 0.4, 0.2, 0 ], "weekendSchedule": [ 0, 0, 0, 0, 0, 0, 0.1, 0.3, 0.5, 0.6, 0.6, 0.6, 0.6, 0.6, 0.6, 0.6, 0.7, 0.8, 0.8, 0.6, 0.4, 0.2, 0.1, 0 ] } }, "metadataScope": "Legacy source/confidence fields describe the adapter as a whole. They do not mean that every thermal, system, occupancy or geometry input is measured. Read the assumption and pending-measurement records.", "engineEnvelope": { "source": "measured", "planAreaSqm": 516.52, "wallLengthM": 287.7, "grossWallAreaSqm": 2746.65, "roofAreaSqm": 613.01, "volumeM3": 5042.91, "derivedFloorAreaSqm": 1877.51, "intensityFloorAreaSqm": 1877.51 }, "engineEnvelopeProvenance": "derived_from_model_with_scope_assumptions", "energyInputRoofCategory": { "type": "flat", "read": "Dach-1…5 at 0° plus ten 12° entrance canopies → 613.01 m² plan union, priced as a flat roof" }, "exteriorDoorAreaSqm": 263.53 }, "assumptions": [ { "id": "A-CLIMATE", "assumes": "Seoul climate, not a Karlsruhe weather series.", "why": "KIT publishes Smiley West as a terraced-house validation example. IfcSite coordinates are an authoring default and are not treated as a surveyed energy climate. The engine currently has Korean regional climates only." }, { "id": "A-ERA-UNDATED", "assumes": "2000–2009 Korean apartment tables and 2001 code year; use code 02000; concrete-family structure 21.", "why": "The IFC header dates the 2017-01-23 ArchiCAD 20 export, not construction. No construction year is established. 2000–2009 is the same mapping used for FZK Haus, the sibling KIT example, rather than a 2020+ table that would flatter an undated validation house." }, { "id": "A-CONDITIONED-SPACES", "assumes": "All 140 IfcSpace are conditioned, including 30 cellar rooms (444.39 m²).", "why": "Room quantities do not establish operating schedules or conditioned status. Including unconditioned cellars would understate energy intensity." }, { "id": "A-ENVELOPE-BOUNDARY", "assumes": "Exterior walls are the 158 IfcRelSpaceBoundary PHYSICAL/EXTERNAL element references; area is each wall's stated NetSideArea.", "why": "554 external physical space-boundary surfaces did not resolve as readable polylines. Membership does not require those unread surfaces and does not consume their area. IsExternal is reported and never used as a filter." }, { "id": "A-WALL-U", "assumes": "Whole-building opaque wall U = 0.47 W/m²K on every sector, the 2000–2009 Korean residential table.", "why": "Assemblies name thicknesses (Kalksandstein 0.175/0.2, Stahlbeton, Beton-Wärmeschutz with 100 mm insulation) but state no conductivity or U-value. A whole-building table mean is not a weighted construction from those names." }, { "id": "A-ROOF", "assumes": "Roof U = 0.29 W/m²K (2000–2009 residential table) on the 613.01 m² plan union. Priced as a flat roof (Dach-1…5 at 0°); ten 12° entrance canopies are included in the plan area and do not change the PV roof type.", "why": "The five main roof decks are IfcSlab PredefinedType=ROOF at 0°. The 12° canopies are 62.5 m² of the 613.01 m². Calling the whole roof a gable would understate the PV utilisation factor." }, { "id": "A-GROUND-BASEMENT", "assumes": "ISO 13370 slab-on-ground on the measured 516.52 m² union / 287.7 m perimeter with 0.20 m reinforced concrete (generic RC conductivity assumed); generic soil; no perimeter insulation. Cellar walls priced as outdoor air.", "why": "The engine lacks a basement-specific model. Pricing cellar walls against outdoor air tends to overstate heating loss. Ten separate ground polygons are the ten terrace footprints, not one building pad." }, { "id": "A-WINDOWS", "assumes": "2000–2009 Korean table: U 2.1, SHGC 0.45; VLT 0.6.", "why": "80 window apertures are measured at OverallWidth × OverallHeight. Thermal and optical properties are not stated." }, { "id": "A-WWR-ENGINE-MEAN", "assumes": "One whole-building glazing/gross-wall ratio on four orientations; measured sector splits retained in the legend. Engine slots N/E/S/W hold the NE/SE/SW/NW sectors.", "why": "True north is −147.5°. Every wall falls in a diagonal sector. This reproduces 95.93 m² of glazing exactly in the shared engine." }, { "id": "A-DOORS", "assumes": "263.53 m² exterior door is priced at the wall U-value.", "why": "66 IfcDoor confirm against an exterior wall at OverallWidth × OverallHeight — unit and balcony doors, not a handful of street doors. The engine has no separate door heat-loss element. Door area is excluded from the wall-insulation measure." }, { "id": "A-HVAC", "assumes": "Apartment-table central gas heating and split cooling; natural ventilation at assumed 0.5 ACH; DHW gas boiler 0.85.", "why": "The file states no typed MEP. Korean table fuel and COP are comparison assumptions, not installed equipment ratings. No inferred network is added." }, { "id": "A-LPD", "assumes": "Apartment code-table lighting: 6 W/m² LED, manual control.", "why": "No lighting power or control property is stated." }, { "id": "A-OCCUPANCY", "assumes": "Apartment table: 0.04 persons/m², 3 W/m² gains, 40 L/person/day DHW, residential weekday/weekend occupancy.", "why": "Room names classify spaces; they do not supply an occupancy schedule." }, { "id": "A-AIRTIGHT", "assumes": "The 2000–2009 table ACH50; the engine divides by 20 to natural ACH.", "why": "No blower-door measurement or infiltration property exists." }, { "id": "A-NORTH-FOOTPRINT", "assumes": "True north −147.5° from the model; square fallback recipe footprint of area 516.52 m²; no baseline PV, solar thermal or geothermal.", "why": "The rendered IFC supplies the actual terrace plan; the square is never treated as a measured outline. Absence of PV in the architectural file does not establish that none exists on a real site." } ], "modeledEnergy": { "status": "modeled_not_metered", "method": { "id": "bimfit-annual-degree-day-screening", "codePath": "src/lib/energy/annual-demand.ts", "scope": "Annual HVAC demand, lighting from power density and operating hours, ratio-estimated domestic hot water and plug loads, and capped annual PV electricity netting for primary energy." }, "endUses": { "hvac": { "heating": { "kwh": 162361.6477203144, "fuel": "gas", "provenance": { "source": "modeled", "basis": "materials.hvac.heating.fuelType is gas" } }, "cooling": { "kwh": 6481.5320655000005, "fuel": "electric", "provenance": { "source": "modeled", "basis": "materials.hvac.cooling.systemType is split" } } }, "lighting": { "kwh": 32893.9752, "fuel": "electric", "provenance": { "source": "modeled", "basis": "LPD 6 W/m² × 1877.5 m² × 2920 h/yr" } }, "dhw": { "kwh": 84421.5898929072, "fuel": "electric", "provenance": { "source": "named_assumption", "assumptionId": "A-DHW-RATIO", "assumption": "주용도코드 \"02\" 프로파일의 급탕(DHW) 비율(25%)을 적용한 추정치이며, 실측값이 아닙니다." } }, "plug": { "kwh": 60783.54472289318, "fuel": "electric", "provenance": { "source": "named_assumption", "assumptionId": "A-PLUG-RATIO", "assumption": "주용도코드 \"02\" 프로파일의 콘센트(plug) 비율(18%)을 적용한 추정치이며, 실측값이 아닙니다." } }, "onSiteGeneration": { "kwh": 0, "capacityKWp": 0, "status": "no_generation_assumed", "provenance": { "source": "named_assumption", "assumptionId": "A-NO-ONSITE-PV", "assumption": "태양광 용량 0 kWp로 발전량 0 kWh/yr를 가정합니다. 실제 발전이 있다면 발전량을 과소평가하고 순에너지와 등급을 더 나쁘게 평가합니다." } } }, "climate": { "sigunguCd": "11", "labelKo": "서울 기후 (가정)", "labelEn": "Seoul climate (assumed)", "assumptionId": "A-CLIMATE", "resolvedRegion": { "sidoCode": "11", "token": "Seoul", "ko": "서울특별시", "via": "sigunguCd", "hdd": 2700, "cdd": 220, "winterDesignTemp": -11.3, "summerDesignTemp": 31.2, "summerDesignTempSource": "regional", "summerDesignTempCitation": "https://greentogether.go.kr/ebook/eais_cust_2017/files/basic-html/page170.html", "peakSunHours": 3.5, "coolingSeasonSolar": 350, "coolingSeasonSolarBasis": "derived_from_regional_psh" }, "status": "assumed", "hddBase18KDay": 2700, "cddBase24KDay": 220, "winterDesignTemperatureC": -11.3, "summerDesignTemperatureC": 31.2, "indoorHeatingSetpointC": 20, "indoorCoolingSetpointC": 26, "coolingSeasonSolarKWhPerM2": 350 }, "hvac": { "heatingDeliveredKWhPerYear": 162361.6477203144, "coolingDeliveredKWhPerYear": 6481.5320655000005, "totalDeliveredKWhPerYear": 168843.1797858144, "deliveredKWhPerM2Year": 89.92931051542436, "fuelDemandKWhPerYear": { "electricKwh": 6481.5320655000005, "fossilKwh": 162361.6477203144, "fossilFuel": "gas" } }, "comparisonRating": { "grade": "6", "table": "residential", "tableSelection": "adapted_use_code", "officialCertificate": false, "primaryKWhPerM2Year": 365.48118394358585, "deliveredFuelInputsKWhPerYear": { "electric": 184580.6418813004, "gas": 162361.6477203144, "districtHeating": 0, "districtCooling": 0, "renewable": 0 }, "primaryEnergyKWhPerYear": { "electric": 507596.7651735761, "gas": 178597.81249234584, "districtHeating": 0, "districtCooling": 0, "renewable": 0, "clippedGenerationKWh": 0, "total": 686194.5776659219 }, "conversionFactorsPrimaryPerDeliveredKWh": { "electricity": 2.75, "gas": 1.1, "districtHeating": 0.728, "districtCooling": 0.937, "renewable": 2.75 }, "limitationIds": [ "L-GRADE-SHARES", "L-SCREENING" ] }, "estimatedWholeBuilding": { "hvacKWhPerYear": 168843.1797858144, "lightingKWhPerYear": 32893.9752, "dhwKWhPerYear": 84421.5898929072, "plugLoadsKWhPerYear": 60783.54472289318, "totalKWhPerYear": 346942.28960161476, "ratioProvenance": { "source": "use_code", "useCodePrefix": "02" }, "limitationIds": [ "L-SITE-TOTAL" ] }, "hvacEmissions": { "totalTonnesCO2PerYear": 35.74219634085014, "kgCO2PerM2Year": 19.037020490356984, "electricTonnesCO2PerYear": 2.9776158308907, "nonElectricTonnesCO2PerYear": 32.764580509959444 }, "wholeBuildingEmissions": { "totalTonnesCO2PerYear": 117.56092739022884, "kgCO2PerM2Year": 62.615340206032904, "electricTonnesCO2PerYear": 84.7963468802694, "nonElectricTonnesCO2PerYear": 32.764580509959444, "basis": "Named end-use fuels with PV offset capped at annual electricity demand. Annual netting is an assumption, not hourly grid matching or measured emissions.", "assumption": null }, "designHeatLoss": { "totalW": 63283.52537239663, "elements": [ { "name": "Walls", "quantity": 2650.7200000000003, "quantityUnit": "m2", "coefficient": 0.47, "coefficientUnit": "W/(m2.K)", "heatLossCoefficientWPerK": 1245.8384, "temperatureDifferenceK": 31.3, "designHeatLossW": 38994.74192 }, { "name": "Windows", "quantity": 95.93, "quantityUnit": "m2", "coefficient": 2.1, "coefficientUnit": "W/(m2.K)", "heatLossCoefficientWPerK": 201.45300000000003, "temperatureDifferenceK": 31.3, "designHeatLossW": 6305.478900000001 }, { "name": "Roof", "quantity": 613.01, "quantityUnit": "m2", "coefficient": 0.29, "coefficientUnit": "W/(m2.K)", "heatLossCoefficientWPerK": 177.7729, "temperatureDifferenceK": 31.3, "designHeatLossW": 5564.29177 }, { "name": "Ground Floor", "quantity": 516.52, "quantityUnit": "m2", "coefficient": 0.9016999398032483, "coefficientUnit": "W/(m2.K)", "heatLossCoefficientWPerK": 465.74605290717375, "temperatureDifferenceK": 6.5, "designHeatLossW": 3027.3493438966293 }, { "name": "Infiltration/Ventilation", "quantity": 5042.91, "quantityUnit": "m3", "coefficient": 0.175, "coefficientUnit": "1/h", "heatLossCoefficientWPerK": 300.053145, "temperatureDifferenceK": 31.3, "designHeatLossW": 9391.6634385 } ] } }, "limitations": [ { "id": "L-MODEL-NOT-SURVEY", "text": "Geometric measurements come from IFC quantities and solids. They are not a field survey, and omitted or misclassified model elements can bias the envelope." }, { "id": "L-NO-METER", "text": "No metered energy series or calibration is included in this export. Linked source archives may contain separate measurements; every energy output here is modeled, not observed consumption." }, { "id": "L-BASELINE", "text": "This export uses the published baseline recipe and material inputs. It excludes browser edits, proposed retrofits, and financing selections." }, { "id": "L-CLIMATE", "text": "The declared comparison region resolves HDD, CDD, design temperatures and peak sun hours. Supported city summer temperatures cite a historical design table; unsupported regions explicitly use a Seoul fallback. Cooling-season solar is assumed as Seoul 350 times regional peak sun hours divided by Seoul peak sun hours. Indoor heating/cooling setpoints remain national assumptions (20/26 C). These are not a weather series or measurements at the IFC site." }, { "id": "L-SCREENING", "text": "The annual degree-day engine is a screening model, not the unwired ISO 13790 monthly kernel, a dynamic hourly simulation, or a certified assessment." }, { "id": "L-GRADE-SHARES", "text": "Named HVAC, lighting, domestic hot water and plug loads declare their fuel before primary-energy conversion. Lighting uses power density times conditioned floor area times annual operating hours; domestic hot water and plug loads remain ratio-estimated. Declared PV capacity and regional assumed yield offset annual electricity, capped at annual electric demand; clipped surplus earns no additional grade credit. Unknown capacity and unresolved regions carry explicit assumptions or refusals. The grade compares Korean thresholds and is not an official certificate." }, { "id": "L-SITE-TOTAL", "text": "Gross whole-building site energy sums modeled HVAC and lighting (power density times conditioned floor area times annual operating hours), plus ratio-estimated domestic hot water and plug loads. PV does not reduce this gross load total. The grade applies fuel-specific primary factors and capped annual PV netting, so gross site energy and primary energy must not be interchanged." } ], "links": { "model": "/models/smiley-west", "dataset": "/api/reference-buildings/smiley-west/dataset", "catalogueJson": "/api/reference-buildings/datasets", "catalogueCsv": "/api/reference-buildings/datasets?format=csv" }, "integrity": { "algorithm": "SHA-256", "manifestSha256": "bbdd486c7a3f48bf6c8d98e2c56672d9b561f2f52c5a3075b3226e6f9b32221f", "modelInputsSha256": "9f087ac52c8b37ef951d62f62c3bb7004573659dafcb7b2ee83c2d79862c722d", "datasetPayloadSha256": "440b33f4a415d33d0966eb9fd0fde9bb8a269e026ee54863b4617e576590acff", "payloadHashScope": "UTF-8 JSON.stringify of this object without the integrity property; property order is preserved.", "codeRevision": "e0986dd0a46512df90a8c5e2277084ef316952c2", "codeRevisionStatus": "deployment_metadata" } }