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1928e5a2d6
Adds `SapRoomInRoofSurface` dataclass (kind + area + insulation thickness
+ insulation type) and an optional `detailed_surfaces` list on
`SapRoomInRoof`. When `detailed_surfaces` is present, the Simplified
A_RR formula is bypassed and the calculator iterates each surface,
applying the appropriate Table 17 / Table 4 U-value:
slope → roof_w_per_k via u_rr_slope (Table 17 col 1)
flat_ceiling → roof_w_per_k via u_rr_flat_ceiling (Table 17 col 2)
stud_wall → roof_w_per_k via u_rr_stud_wall (Table 17 col 3)
gable_wall → party_walls_w_per_k at U=0.25 (Table 4 "as
common wall")
This mapping mirrors the U985 worksheet for 000477 where RR stud walls
+ slope + flat-ceiling lines sit under (30) and RR gable walls sit
under (32). The §3.9 deduction of `A_RR_floor` from the storey-below
roof area still applies.
Synthetic test pins a 1-storey + RR dwelling with 4 detailed surfaces
(slope/stud_wall/flat_ceiling/gable_wall) at hand-computed U-values
from Table 17 and Table 4, abs=0.001 tolerance.
Reference: RdSAP 10 (10-06-2025) §3.10 page 24-25; Figure 4; Table 17
page 44; Table 4 page 22.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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|---|---|---|
| .. | ||
| tests | ||
| __init__.py | ||
| epc.py | ||
| epc_codes.csv | ||
| epc_property_data.py | ||
| field_mappings.py | ||
| historic_epc.py | ||
| historic_epc_matching.py | ||
| mapper.py | ||