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Slice 92: API mapper floor dimensions (SAP +0.25m + exposed-floor + NI→None)
Three coupled API-mapper fixes that close the cert 001479 floor-W/K
gap from +4.39 to EXACT 0.
(1) Upper-floor room_height_m += 0.25 m
SAP 10.2 convention: every storey above the lowest adds 0.25 m to the
lodged room_height for the joist/floor-void contribution (cohort
Elmhurst mapper already applies this via `_UPPER_FLOOR_HEIGHT_ADD_M`
at line 2338). The API schema lodges the raw internal height; the
cascade volume computation needs the +0.25 m before computing party-
wall area and ventilation ACH. For cert 001479 Main floor=1, raw
lodge 2.28 m vs worksheet 2.53 m — without the fix, party W/K was
short by 0.87 (party_wall_length × delta_height × U).
(2) `is_exposed_floor=True` when `bp.floor_heat_loss == 1`
API integer code 1 on `floor_heat_loss` signals an exposed floor (a
bp's lowest storey hanging over an unheated space or external air).
Mirrors the cohort Elmhurst mapper's `_is_floor_exposed_to_unheated_
space` for the API path. Applied only to the lowest storey (floor==0)
per the cohort 000490/000487 fixture convention. For cert 001479
Ext2 (cantilevered upper-storey extension over external air), this
routes the cascade through Table 20's `u_exposed_floor` (U=1.20)
rather than the BS EN ISO 13370 ground-floor formula.
(3) `floor_insulation_thickness="NI" → None` for cascade default
API certs commonly lodge "NI" (no measured thickness) on floors that
aren't actually uninsulated — for newer age bands (I-M with non-zero
Table 19 defaults: 25/75/100/100/140 mm) the cascade should use the
age-band default insulation rather than treating "NI" as explicit
zero. Translate "NI" → None at the mapper boundary so `u_floor`
reaches the Table 19 fallback. For cert 001479 Ext1 (age M, suspended
timber, NI lodged) the cascade now returns U=0.20 via the age-M
140 mm default — previously gave U=1.05 from treating thickness as 0.
**Floor W/K is now EXACT for cert 001479** (23.1705 ✓).
Impact on cert 001479 API path:
Before Slice 87: +3.0752 SAP delta
After Slice 90: +1.5298
After Slice 91: +1.0970
After Slice 92: +1.0022 (floor W/K exact; remaining gap is in
windows / gains — Slice 93)
Golden cert residual updates: 7 of 10 expectations shifted from the
floor cascade improvements (NI→None changed many certs with age I-M
extensions). Spec-compliance shifts; new residuals committed.
Pyright: mapper.py 33 → 33.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit is contained in:
Khalim Conn-Kowlessar
parent
2cebba28dc
commit
8e752e5720
2 changed files with 151 additions and 93 deletions
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@ -626,18 +626,9 @@ class EpcPropertyDataMapper:
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party_wall_construction=_api_party_wall_construction_int(
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bp.party_wall_construction
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),
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sap_floor_dimensions=[
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SapFloorDimension(
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room_height_m=_measurement_value(fd.room_height),
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total_floor_area_m2=_measurement_value(fd.total_floor_area),
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party_wall_length_m=_measurement_value(fd.party_wall_length),
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heat_loss_perimeter_m=_measurement_value(fd.heat_loss_perimeter),
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floor=fd.floor,
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floor_insulation=fd.floor_insulation,
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floor_construction=fd.floor_construction,
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)
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for fd in (bp.sap_floor_dimensions or [])
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],
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sap_floor_dimensions=_api_build_sap_floor_dimensions(
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bp.sap_floor_dimensions or [], bp.floor_heat_loss,
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),
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building_part_number=bp.building_part_number,
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wall_dry_lined=bp.wall_dry_lined == "Y",
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wall_thickness_mm=bp.wall_thickness,
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@ -765,24 +756,28 @@ class EpcPropertyDataMapper:
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party_wall_construction=_api_party_wall_construction_int(
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bp.party_wall_construction
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),
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sap_floor_dimensions=[
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SapFloorDimension(
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room_height_m=_measurement_value(fd.room_height),
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total_floor_area_m2=_measurement_value(fd.total_floor_area),
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party_wall_length_m=_measurement_value(fd.party_wall_length),
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heat_loss_perimeter_m=_measurement_value(fd.heat_loss_perimeter),
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floor=fd.floor,
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floor_insulation=fd.floor_insulation,
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floor_construction=fd.floor_construction,
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)
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for fd in (bp.sap_floor_dimensions or [])
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],
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sap_floor_dimensions=_api_build_sap_floor_dimensions(
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bp.sap_floor_dimensions or [], bp.floor_heat_loss,
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),
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building_part_number=bp.building_part_number,
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wall_dry_lined=bp.wall_dry_lined == "Y",
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wall_thickness_mm=bp.wall_thickness,
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wall_insulation_thickness=bp.wall_insulation_thickness,
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floor_heat_loss=bp.floor_heat_loss,
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floor_insulation_thickness=bp.floor_insulation_thickness,
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# API certs commonly lodge "NI" (no measured
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# thickness) on floors that aren't actually
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# uninsulated — for newer age bands (I-M) the
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# cascade should fall back to the Table 19 age-band
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# default insulation. Translate "NI" → None at the
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# mapper boundary so `u_floor` reaches its age-band
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# default branch instead of the "explicit zero"
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# path. Cert 001479 Ext1 (age M, suspended timber,
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# NI lodged) gets U=0.20 via the age-M 140 mm
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# default; previously cascade returned U=1.05.
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floor_insulation_thickness=(
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None if bp.floor_insulation_thickness == "NI"
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else bp.floor_insulation_thickness
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),
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flat_roof_insulation_thickness=bp.flat_roof_insulation_thickness,
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roof_construction=bp.roof_construction,
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roof_insulation_location=bp.roof_insulation_location,
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@ -917,24 +912,28 @@ class EpcPropertyDataMapper:
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party_wall_construction=_api_party_wall_construction_int(
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bp.party_wall_construction
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),
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sap_floor_dimensions=[
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SapFloorDimension(
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room_height_m=_measurement_value(fd.room_height),
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total_floor_area_m2=_measurement_value(fd.total_floor_area),
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party_wall_length_m=_measurement_value(fd.party_wall_length),
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heat_loss_perimeter_m=_measurement_value(fd.heat_loss_perimeter),
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floor=fd.floor,
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floor_insulation=fd.floor_insulation,
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floor_construction=fd.floor_construction,
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)
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for fd in (bp.sap_floor_dimensions or [])
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],
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sap_floor_dimensions=_api_build_sap_floor_dimensions(
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bp.sap_floor_dimensions or [], bp.floor_heat_loss,
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),
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building_part_number=bp.building_part_number,
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wall_dry_lined=bp.wall_dry_lined == "Y",
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wall_thickness_mm=bp.wall_thickness,
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wall_insulation_thickness=bp.wall_insulation_thickness,
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floor_heat_loss=bp.floor_heat_loss,
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floor_insulation_thickness=bp.floor_insulation_thickness,
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# API certs commonly lodge "NI" (no measured
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# thickness) on floors that aren't actually
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# uninsulated — for newer age bands (I-M) the
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# cascade should fall back to the Table 19 age-band
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# default insulation. Translate "NI" → None at the
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# mapper boundary so `u_floor` reaches its age-band
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# default branch instead of the "explicit zero"
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# path. Cert 001479 Ext1 (age M, suspended timber,
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# NI lodged) gets U=0.20 via the age-M 140 mm
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# default; previously cascade returned U=1.05.
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floor_insulation_thickness=(
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None if bp.floor_insulation_thickness == "NI"
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else bp.floor_insulation_thickness
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),
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flat_roof_insulation_thickness=bp.flat_roof_insulation_thickness,
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roof_construction=bp.roof_construction,
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roof_insulation_location=bp.roof_insulation_location,
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@ -1086,24 +1085,28 @@ class EpcPropertyDataMapper:
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party_wall_construction=_api_party_wall_construction_int(
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bp.party_wall_construction
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),
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sap_floor_dimensions=[
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SapFloorDimension(
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room_height_m=_measurement_value(fd.room_height),
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total_floor_area_m2=_measurement_value(fd.total_floor_area),
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party_wall_length_m=_measurement_value(fd.party_wall_length),
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heat_loss_perimeter_m=_measurement_value(fd.heat_loss_perimeter),
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floor=fd.floor,
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floor_insulation=fd.floor_insulation,
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floor_construction=fd.floor_construction,
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)
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for fd in (bp.sap_floor_dimensions or [])
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],
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sap_floor_dimensions=_api_build_sap_floor_dimensions(
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bp.sap_floor_dimensions or [], bp.floor_heat_loss,
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),
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building_part_number=bp.building_part_number,
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wall_dry_lined=bp.wall_dry_lined == "Y",
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wall_thickness_mm=bp.wall_thickness,
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wall_insulation_thickness=bp.wall_insulation_thickness,
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floor_heat_loss=bp.floor_heat_loss,
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floor_insulation_thickness=bp.floor_insulation_thickness,
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# API certs commonly lodge "NI" (no measured
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# thickness) on floors that aren't actually
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# uninsulated — for newer age bands (I-M) the
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# cascade should fall back to the Table 19 age-band
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# default insulation. Translate "NI" → None at the
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# mapper boundary so `u_floor` reaches its age-band
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# default branch instead of the "explicit zero"
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# path. Cert 001479 Ext1 (age M, suspended timber,
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# NI lodged) gets U=0.20 via the age-M 140 mm
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# default; previously cascade returned U=1.05.
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floor_insulation_thickness=(
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None if bp.floor_insulation_thickness == "NI"
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else bp.floor_insulation_thickness
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),
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flat_roof_insulation_thickness=bp.flat_roof_insulation_thickness,
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roof_construction=bp.roof_construction,
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# Surface human-readable strings derived from the
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@ -1295,24 +1298,28 @@ class EpcPropertyDataMapper:
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party_wall_construction=_api_party_wall_construction_int(
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bp.party_wall_construction
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),
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sap_floor_dimensions=[
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SapFloorDimension(
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room_height_m=_measurement_value(fd.room_height),
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total_floor_area_m2=_measurement_value(fd.total_floor_area),
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party_wall_length_m=_measurement_value(fd.party_wall_length),
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heat_loss_perimeter_m=_measurement_value(fd.heat_loss_perimeter),
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floor=fd.floor,
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floor_insulation=fd.floor_insulation,
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floor_construction=fd.floor_construction,
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)
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for fd in (bp.sap_floor_dimensions or [])
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],
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sap_floor_dimensions=_api_build_sap_floor_dimensions(
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bp.sap_floor_dimensions or [], bp.floor_heat_loss,
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),
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building_part_number=bp.building_part_number,
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wall_dry_lined=bp.wall_dry_lined == "Y",
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wall_thickness_mm=bp.wall_thickness,
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wall_insulation_thickness=bp.wall_insulation_thickness,
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floor_heat_loss=bp.floor_heat_loss,
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floor_insulation_thickness=bp.floor_insulation_thickness,
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# API certs commonly lodge "NI" (no measured
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# thickness) on floors that aren't actually
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# uninsulated — for newer age bands (I-M) the
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# cascade should fall back to the Table 19 age-band
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# default insulation. Translate "NI" → None at the
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# mapper boundary so `u_floor` reaches its age-band
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# default branch instead of the "explicit zero"
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# path. Cert 001479 Ext1 (age M, suspended timber,
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# NI lodged) gets U=0.20 via the age-M 140 mm
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# default; previously cascade returned U=1.05.
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floor_insulation_thickness=(
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None if bp.floor_insulation_thickness == "NI"
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else bp.floor_insulation_thickness
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),
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flat_roof_insulation_thickness=bp.flat_roof_insulation_thickness,
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roof_construction=bp.roof_construction,
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# Surface human-readable strings derived from the
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@ -1573,24 +1580,28 @@ class EpcPropertyDataMapper:
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party_wall_construction=_api_party_wall_construction_int(
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bp.party_wall_construction
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),
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sap_floor_dimensions=[
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SapFloorDimension(
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room_height_m=_measurement_value(fd.room_height),
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total_floor_area_m2=_measurement_value(fd.total_floor_area),
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party_wall_length_m=_measurement_value(fd.party_wall_length),
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heat_loss_perimeter_m=_measurement_value(fd.heat_loss_perimeter),
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floor=fd.floor,
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floor_insulation=fd.floor_insulation,
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floor_construction=fd.floor_construction,
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)
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for fd in (bp.sap_floor_dimensions or [])
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],
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sap_floor_dimensions=_api_build_sap_floor_dimensions(
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bp.sap_floor_dimensions or [], bp.floor_heat_loss,
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),
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building_part_number=bp.building_part_number,
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wall_dry_lined=bp.wall_dry_lined == "Y",
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wall_thickness_mm=bp.wall_thickness,
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wall_insulation_thickness=bp.wall_insulation_thickness,
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floor_heat_loss=bp.floor_heat_loss,
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floor_insulation_thickness=bp.floor_insulation_thickness,
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# API certs commonly lodge "NI" (no measured
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# thickness) on floors that aren't actually
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# uninsulated — for newer age bands (I-M) the
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# cascade should fall back to the Table 19 age-band
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# default insulation. Translate "NI" → None at the
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# mapper boundary so `u_floor` reaches its age-band
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# default branch instead of the "explicit zero"
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# path. Cert 001479 Ext1 (age M, suspended timber,
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# NI lodged) gets U=0.20 via the age-M 140 mm
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# default; previously cascade returned U=1.05.
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floor_insulation_thickness=(
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None if bp.floor_insulation_thickness == "NI"
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else bp.floor_insulation_thickness
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),
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flat_roof_insulation_thickness=bp.flat_roof_insulation_thickness,
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roof_construction=bp.roof_construction,
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# Surface human-readable strings derived from the
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@ -2050,6 +2061,53 @@ def _api_roof_construction_str(value: Optional[int]) -> Optional[str]:
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return _API_ROOF_CONSTRUCTION_TO_STR.get(value) if value is not None else None
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# API `floor_heat_loss` integer that signals an exposed floor (lowest
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# storey of a bp that hangs over an unheated space or external air).
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# Cohort cert 001479 Ext2 lodges floor_heat_loss=1 on its cantilevered
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# upper-storey extension; the Summary mapper sets is_exposed_floor=True
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# on the lowest floor for this case (routes through Table 20's u_exposed
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# _floor cascade at U=1.20 instead of BS EN ISO 13370 ground-floor).
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_API_FLOOR_HEAT_LOSS_EXPOSED: Final[int] = 1
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def _api_build_sap_floor_dimensions(
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fds: List[Any],
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floor_heat_loss: Optional[int],
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) -> List[SapFloorDimension]:
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"""Build per-bp `SapFloorDimension` list with the SAP10.2 conventions
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the API schema doesn't lodge directly:
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1. **Upper-floor room height +0.25 m** (SAP convention for the
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joist/floor-void contribution; the ground floor uses the lodged
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value directly). Cohort cert 001479 Main floor=1 lodges
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room_height=2.28 m — the worksheet uses 2.53 m. Without the
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+0.25 m the cascade volume is short → ventilation low →
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SAP overshoot.
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2. **`is_exposed_floor=True`** when `bp.floor_heat_loss` == 1 (the
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lowest floor of a cantilevered or over-unheated-space bp routes
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through Table 20's `u_exposed_floor` cascade at U=1.20 rather
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than the BS EN ISO 13370 ground-floor formula). Applied only to
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the lowest storey (floor==0) per the cohort 000490/000487
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fixture convention.
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"""
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is_exposed = floor_heat_loss == _API_FLOOR_HEAT_LOSS_EXPOSED
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out: List[SapFloorDimension] = []
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for fd in fds or []:
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raw_height = _measurement_value(fd.room_height)
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height = raw_height if fd.floor == 0 else raw_height + _UPPER_FLOOR_HEIGHT_ADD_M
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out.append(SapFloorDimension(
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room_height_m=height,
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total_floor_area_m2=_measurement_value(fd.total_floor_area),
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party_wall_length_m=_measurement_value(fd.party_wall_length),
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heat_loss_perimeter_m=_measurement_value(fd.heat_loss_perimeter),
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floor=fd.floor,
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floor_insulation=fd.floor_insulation,
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floor_construction=fd.floor_construction,
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is_exposed_floor=is_exposed and fd.floor == 0,
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))
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return out
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def _api_resolve_sloping_ceiling_thickness(
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roof_construction: Optional[int],
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roof_insulation_thickness: Union[str, int, None],
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@ -95,8 +95,8 @@ _EXPECTATIONS: tuple[_GoldenExpectation, ...] = (
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cert_number="0300-2747-7640-2526-2135",
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actual_sap=78,
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expected_sap_resid=+2,
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expected_pe_resid_kwh_per_m2=-1.9082,
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expected_co2_resid_tonnes_per_yr=-1.0829,
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expected_pe_resid_kwh_per_m2=-0.9139,
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expected_co2_resid_tonnes_per_yr=-0.9974,
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notes=(
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"Large semi-detached, TFA 526, age D, gas boiler PCDB-listed "
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"(no Table 4b code). Cert lodges open_flues_count=1 + "
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@ -110,17 +110,17 @@ _EXPECTATIONS: tuple[_GoldenExpectation, ...] = (
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_GoldenExpectation(
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cert_number="0390-2954-3640-2196-4175",
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actual_sap=60,
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expected_sap_resid=-4,
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expected_pe_resid_kwh_per_m2=-31.5482,
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expected_co2_resid_tonnes_per_yr=-3.0251,
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expected_sap_resid=-5,
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expected_pe_resid_kwh_per_m2=-28.4884,
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expected_co2_resid_tonnes_per_yr=-2.7466,
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notes="Large detached, TFA 360, age F, oil PCDB-listed. Cert lodges has_draught_lobby=true.",
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),
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_GoldenExpectation(
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cert_number="6035-7729-2309-0879-2296",
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actual_sap=70,
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expected_sap_resid=-5,
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expected_pe_resid_kwh_per_m2=+34.4963,
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expected_co2_resid_tonnes_per_yr=+0.7742,
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expected_pe_resid_kwh_per_m2=+37.7305,
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expected_co2_resid_tonnes_per_yr=+0.8510,
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notes=(
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"Mid-terrace, TFA 128, age A, gas combi Table 4b code 104. "
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"Slice 59 per-bp window apportionment tightens all 3 "
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@ -133,8 +133,8 @@ _EXPECTATIONS: tuple[_GoldenExpectation, ...] = (
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cert_number="7536-3827-0600-0600-0276",
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actual_sap=68,
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expected_sap_resid=+2,
|
||||
expected_pe_resid_kwh_per_m2=-15.8298,
|
||||
expected_co2_resid_tonnes_per_yr=-0.4207,
|
||||
expected_pe_resid_kwh_per_m2=-11.7633,
|
||||
expected_co2_resid_tonnes_per_yr=-0.3124,
|
||||
notes=(
|
||||
"Detached + 2 extensions, TFA 152. Multi-age bps (Main=D, "
|
||||
"Ext1=L, Ext2=F). Slice 59 (per-bp window apportionment) and "
|
||||
|
|
@ -147,8 +147,8 @@ _EXPECTATIONS: tuple[_GoldenExpectation, ...] = (
|
|||
cert_number="8135-1728-8500-0511-3296",
|
||||
actual_sap=72,
|
||||
expected_sap_resid=+1,
|
||||
expected_pe_resid_kwh_per_m2=-16.3714,
|
||||
expected_co2_resid_tonnes_per_yr=-0.2836,
|
||||
expected_pe_resid_kwh_per_m2=-13.0069,
|
||||
expected_co2_resid_tonnes_per_yr=-0.2200,
|
||||
notes=(
|
||||
"Semi-detached, TFA 102, age C, gas PCDB-listed. Cert lodges "
|
||||
"blocked_chimneys_count=1. Slice 59 per-bp window apportionment "
|
||||
|
|
@ -159,9 +159,9 @@ _EXPECTATIONS: tuple[_GoldenExpectation, ...] = (
|
|||
_GoldenExpectation(
|
||||
cert_number="2130-1033-4050-5007-8395",
|
||||
actual_sap=82,
|
||||
expected_sap_resid=+3,
|
||||
expected_pe_resid_kwh_per_m2=-51.0953,
|
||||
expected_co2_resid_tonnes_per_yr=+0.1517,
|
||||
expected_sap_resid=+2,
|
||||
expected_pe_resid_kwh_per_m2=-44.8941,
|
||||
expected_co2_resid_tonnes_per_yr=+0.2250,
|
||||
notes=(
|
||||
"End-terrace + 1 extension, TFA 64, gas combi PCDB index 17505, "
|
||||
"postcode DE22 (PCDB Table 172 match), PV: 2× 2.04 kWp arrays "
|
||||
|
|
@ -180,8 +180,8 @@ _EXPECTATIONS: tuple[_GoldenExpectation, ...] = (
|
|||
cert_number="0390-2254-6420-2126-5561",
|
||||
actual_sap=65,
|
||||
expected_sap_resid=+1,
|
||||
expected_pe_resid_kwh_per_m2=-8.9202,
|
||||
expected_co2_resid_tonnes_per_yr=-0.0942,
|
||||
expected_pe_resid_kwh_per_m2=-3.5091,
|
||||
expected_co2_resid_tonnes_per_yr=-0.0136,
|
||||
notes=(
|
||||
"End-terrace + 1 extension, TFA 80, gas combi PCDB index 18119, "
|
||||
"no PV, no secondary, postcode LN12 (PCDB Table 172 match). "
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue