48 IFC space-solid plan unions; 16 voided opaque cladding faces clipped to the occupied 0–14 m envelope (floor-edge bands included, parapet excluded); 167 whole-window openings and one exterior door; ground-slab union; sky-visible roof planes. July Klassiqua documentation supplies whole-assembly U-values for 2026. Conditioning and operational inputs remain a T4_2026 screening scenario, not metered performance.
S-SOURCE-THERMAL · Source design inputs: full wall U 0.18, roof U 0.19, effective ground U 0.17, whole-window Uw 0.90 W/m²K and glazing g 0.52.
https://zenodo.org/api/records/21727160/files/2026-07_Klassiqua_Buero_Archetypen_Dokumentation.pdf/content — July documentation tables 3.1 and 3.4 (PDF pages 11–12 and 16). These are archetype design calculations, not measured in-use properties. Ground U already includes ISO 13370; no second ground solver is applied. The full-wall value includes masonry, plaster and cladding, not one IFC leaf alone.
A-SCENARIO-T4 · T4_2026: air-water heat pump with thermally activated slabs, reversible cooling, central ventilation with heat recovery named but unquantified, and 250 m² rooftop PV that this screening does not price.
The source documentation table 3.5 (PDF page 19) assigns T4 exclusively to 2026. Technical plant is not represented in the IFC. Heating and cooling COP 3.5 are BIMFIT screening values, not source ratings. Heat-recovery efficiency is set to zero because table 3.5 names an HRV without a fraction; that overstates ventilation loss. Omitting the 250 m² PV understates the source EG40 claim.
A-CLIMATE · Seoul climate for comparison, instead of the source's Aachen scenario.
The current engine supplies Korean regional weather. The archetype's location is a simulation input, not evidence of an existing office.
A-ENVELOPE-SCOPE · All 48 spaces are conditioned. Opaque façade follows the 2026 cladding between the measured room floor and ceiling limits, 0–14 m; parapet faces are excluded.
Floor-edge bands omitted by masonry solids are included. The source's published 30.13% façade window ratio has a different façade scope; the engine derives its own ratio from measured whole openings and this clipped envelope. Conditioning plant rooms and circulation is an explicit simplification.
A-UNIFORM-WALL-U · The source full-wall U 0.18 applies uniformly to the clipped cladding footprint, including floor-edge bands; no extra thermal-bridge loss.
The source supplies a combined wall construction U, not separate 2D floor-junction losses. Applying it across floor edges can understate heat loss where concrete bridges the insulation.
A-ROOF-SCOPE · Roof U 0.19 across 420.94 m² of sky-visible flat planes, including the exposed structural perimeter strip.
The structural slab and roofing assembly overlap; their 818.89 m² layer sum must not be priced twice. Parapet caps are omitted from roof planes. The uniform construction value can understate losses at the perimeter strip; roof reflectance 0.3 and emissivity 0.9 are assumptions.
A-WINDOWS · Whole-window Uw 0.90 is applied to the full 379.92 m² aperture, without multiplying area by the 0.71 glass fraction.
Source table 3.4 distinguishes Uw from glass-only Ug. Its 32 single-leaf and 135 double-leaf windows all have triple Low-E argon glazing; leaf count is not glazing count. Source g=0.52 is retained; the engine separately applies its default combined shading/frame factor 0.7. The IFC window types state VLT 0.74, argon fill, Low-E coating and shading coefficient 0.60. Leakage remains an assumption; no shading survey is claimed.
A-DOORS · The 2.78 m² exterior door is priced at wall U 0.18 because the shared engine has no separate door element.
Source table 3.4 (PDF page 17) states exterior-door Ud 1.03. This engine limitation understates its transmission coefficient by (1.03−0.18)×2.78 = 2.363 W/K. Door aperture is excluded from wall-insulation area.
A-NORTH-SLOTS · Actual diagonal sectors NE/SE/SW/NW occupy the engine's N/E/S/W slots, with the displayed labels corrected to the actual sectors.
The IFC states true north. The annual engine uses a whole-building mean WWR and does not model direction-specific solar gains. The full eight-sector measurements remain in the manifest; the four-slot representation must not be interpreted as a rotated building.
A-WWR-MEAN · A uniform ratio across four engine slots reproduces the measured whole-building glazing aperture exactly.
Sector glazing is preserved in the source manifest; the annual model uses the ratio's arithmetic mean. Independently rounded sector areas can differ from the whole-building total by 0.01 m².
A-AIRTIGHT · 0.6 ACH50 from the assumed 2020+ Korean era table; the engine divides by 20 to natural air changes.
The archetype's 2026 era is stated, but no blower-door result or numeric infiltration rate was found. This is not a measured German airtightness value.
A-USE-OPERATIONS · Korean office use code 14000, concrete-family recipe code 21; office table occupancy/gains/DHW, 10 W/m² LED lighting with daylight dimming, electric DHW, and an office schedule.
Use and source constructions support these classifications; code mapping, loads and schedules are modeling assumptions. Annual energy uses generic end-use shares rather than a room-by-room lighting simulation.
A-RENEWABLE-OTHER · No solar thermal or geothermal plant; no separate perimeter-insulation term or moisture-barrier benefit. T4's 250 m² PV is not priced.
Technical systems are not modeled as IFC occurrences. Omitting the documented PV understates the source EG40 primary-energy claim.