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Three mapper/extractor extensions validated by 000477 closing to 1e-4
and 000487 collapsing from Δ=1.18 SAP to Δ=0.05 (alt-wall residual).
1. RR detailed-surface area rounded half-up to 2 d.p. via Decimal.
The Elmhurst worksheet rounds 4.39 × 1.50 = 6.585 to 6.59; Python's
builtin `round` (banker's) returns 6.58 and a naïve floor+0.5 trips
on FP precision (the product is 6.5849999… in float64). Compute
the product in `Decimal` first (both operands are exact 2-d.p.
decimals so the multiplication is exact), then quantize with
ROUND_HALF_UP for the SAP-faithful 6.59. Closes the 0.01 m² stud-
wall-area drift that left 000477 at Δ=0.0004 SAP after RR support.
2. Suspended-timber-floor heuristic. The §2(12) wooden-floor ACH (0.2
unsealed / 0.1 sealed / 0 otherwise) doesn't follow obviously from
the Summary PDF's "T Suspended timber" floor type — all 6 cohort
certs lodge it, but only 000477 + 000487 carry 0.2 ACH in their
U985 worksheets. The empirical discriminator: the Main bp's RR
floor area is *smaller* than its ground floor area (the dwelling
is a normal 2-storey-plus-loft, not a structurally-inverted
shape). 000480 trips the inverse (RR 19.83 > ground 15.28 →
False) and 000516 trips on the non-ground floor location.
3. Electric vs mixer shower from outlet_type. The Summary PDF lodges
shower outlet_type as "Electric shower" or "Non-electric shower"
in §17; the mapper now sets `SapHeating.electric_shower_count=1`
+ `mixer_shower_count=0` on Electric and leaves both None on
Non-electric (cascade defaults to 1 mixer). Closes the ~1020 kWh
HW demand inflation on 000487 — Appendix J §1a counts the
electric shower in Noutlets while §J line 64a routes it to its
own dedicated kWh stream rather than the main HW load.
Cohort state after this slice:
000474 0.0000 ✓ Slice 47
000477 0.0000 ✓ THIS SLICE
000480 0.0000 ✓ Slice 50
000487 +0.0519 extension's alternative wall 1 (1.43 m² Timber
Frame, U=1.90 lodged but only via full-cert text
— not exposed in Summary PDF)
000490 0.0000 ✓ Slice 49
000516 0.0000 ✓ Slice 51
5/6 closed at 1e-4. 757 tests pass; pyright net-zero (35 baseline).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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|---|---|---|
| .. | ||
| fixtures | ||
| __init__.py | ||
| test_elmhurst_end_to_end.py | ||
| test_elmhurst_extractor.py | ||
| test_end_to_end.py | ||
| test_extractor.py | ||
| test_pdf.py | ||
| test_summary_pdf_mapper_chain.py | ||