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4c10405071
recommend_floor_insulation(epc, products) detects an uninsulated ground floor (SapBuildingPart.floor_insulation_thickness blank/zero) and its construction from floor_construction_type — 'Suspended timber' -> suspended_floor_insulation, 'Solid' -> solid_floor_insulation — emitting the matching single Option (a floor is one construction, like a cavity wall) with the overlay (floor_insulation_thickness = 100 mm) and a priced Cost (ground-floor area x the Product's fully-loaded unit cost + contingency). - building_geometry.ground_floor_area(epc, identifier): the lowest floor's (floor == 0) area. Pinned 14.85 m^2 on 000490 MAIN. - BuildingPartOverlay gains floor_insulation_thickness (generic Applicator writes it unchanged). suspended (0.20) / solid (0.26) floor contingencies. Progress on #1159 (generator + geometry); end-to-end + Elmhurst pin pending the orchestrator (#1157) and parser. Four behaviour tests (suspended / solid / none / cost) + geometry pin. pyright strict clean. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
62 lines
2.2 KiB
Python
62 lines
2.2 KiB
Python
"""Building geometry derived purely from an EpcPropertyData.
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Reusable outside the SAP calculator (e.g. for Modelling cost quantities).
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Today this re-derives the heat-loss wall area; the calculator computes the
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same quantity inline (`heat_transmission._part_geometry`). A later, calculator-
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branch-coordinated refactor should DRY the two onto this module so there is a
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single source of truth. See the project memory on calculator geometry.
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"""
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from datatypes.epc.domain.epc_property_data import (
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BuildingPartIdentifier,
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EpcPropertyData,
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)
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def gross_heat_loss_wall_area(
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epc: EpcPropertyData, identifier: BuildingPartIdentifier
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) -> float:
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"""Gross external wall area of one building part, in m^2: the sum over its
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storeys of heat-loss perimeter x room height. This is the heat-loss area
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(party walls are excluded — they are not on the heat-loss perimeter); it is
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not netted of window/door openings.
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"""
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part = next(
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candidate
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for candidate in epc.sap_building_parts
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if candidate.identifier is identifier
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)
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area = sum(
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fd.heat_loss_perimeter_m * fd.room_height_m
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for fd in part.sap_floor_dimensions
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)
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return round(area, 2)
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def roof_area(epc: EpcPropertyData, identifier: BuildingPartIdentifier) -> float:
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"""Roof area of one building part, in m^2. Per RdSAP10 §3.8 the roof area is
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the greatest of the part's per-storey floor areas (not the top-floor area,
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which can be smaller)."""
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part = next(
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candidate
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for candidate in epc.sap_building_parts
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if candidate.identifier is identifier
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)
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return round(
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max(fd.total_floor_area_m2 for fd in part.sap_floor_dimensions), 2
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)
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def ground_floor_area(
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epc: EpcPropertyData, identifier: BuildingPartIdentifier
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) -> float:
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"""Ground-floor area of one building part, in m^2 — the area of its lowest
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floor (``floor == 0``), the surface a ground-floor insulation measure
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treats."""
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part = next(
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candidate
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for candidate in epc.sap_building_parts
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if candidate.identifier is identifier
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)
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ground = next(fd for fd in part.sap_floor_dimensions if fd.floor == 0)
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return round(ground.total_floor_area_m2, 2)
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