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update air permebility

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Jun-te Kim 2026-06-23 13:21:31 +00:00
parent 60ec922430
commit 2b0cb180bf
1 changed files with 7 additions and 3 deletions
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10
datatypes/epc/domain/tests/test_from_sap_schema.py
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@ -324,7 +324,7 @@ class TestFromSapSchema17_1CodeBasedHeating:
class TestFromSapSchema17_1Ventilation:
"""Slice D5-vent: full-SAP sap_ventilation → measured air permeability (AP4),
"""Slice D5-vent: full-SAP sap_ventilation → measured air permeability (AP50),
ventilation_type → MechanicalVentilationKind, sheltered sides, wet rooms and
the MEV PCDB index."""
@ -333,9 +333,13 @@ class TestFromSapSchema17_1Ventilation:
schema = from_dict(SapSchema17_1, load("sap_17_1.json"))
return EpcPropertyDataMapper.from_sap_schema_17_1(schema)
def test_measured_air_permeability_fed_as_ap4(self, sample: EpcPropertyData) -> None:
def test_measured_air_permeability_fed_as_ap50(self, sample: EpcPropertyData) -> None:
# The lodged `air_permeability` is a q50 Blower-Door result, so it feeds the
# engine's AP50 path `(18) = AP50/20 + (8)` — NOT the AP4/Pulse formula
# `0.263 × AP4^0.924` (the air-permeability AP50 fix, uprn_10093116528).
assert sample.sap_ventilation is not None
assert sample.sap_ventilation.air_permeability_ap4_m3_h_m2 == 2.6
assert sample.sap_ventilation.air_permeability_ap50_m3_h_m2 == 2.6
assert sample.sap_ventilation.air_permeability_ap4_m3_h_m2 is None
def test_ventilation_type_6_is_extract(self, sample: EpcPropertyData) -> None:
# ventilation_type 6 = MEV decentralised → EXTRACT_OR_PIV_OUTSIDE.