| MUST_HAVE_HABITABLE_ROOMS |
"Habitable-Room-Count" must be an integer and must be greater than or equal to 1 |
yes |
yes |
|
yes |
| RATINGS_MUST_BE_POSITIVE |
"Energy-Rating-Current", "Energy-Rating-Potential", "Environmental-Impact-Current" and "Environmental-Impact-Potential" must be greater than 0 |
yes |
yes |
|
yes |
| MUST_HAVE_DESCRIPTION |
"Description" for parent node "Wall", "Walls", "Roof", "Floor", "Window", "Windows", "Main-Heating", "Main-Heating-Controls", "Hot-Water", "Lighting" and "Secondary-Heating" must not be equal to the parent node name, ignoring case |
yes |
yes |
|
yes |
| MUST_HAVE_HEATED_ROOMS |
"Heated-Room-Count" must be an integer and must be greater than or equal to 0 |
yes |
yes |
|
no |
| MAIN_HEATING_CONTROL_RANGE |
"Main-Heating-Control" must be an integer and must be greater than or equal to 2000 and less than 3000 |
yes |
yes |
|
no |
| WATER_HEATING_CODE_RANGE |
"Water-Heating-Code" must be an integer and must be greater than or equal to 900 and less than 1000 |
yes |
yes |
|
no |
| DATES_IN_RANGE |
"Inspection-Date", "Registration-Date" and "Completion-Date" must not be in the future and must not be more than 18 months ago |
yes |
yes |
|
yes |
| SAP_FLOOR_AREA_RANGE |
"Total-Floor-Area" within "SAP-Floor-Dimension" must be greater than 0 and less than or equal to 3000 |
yes |
yes |
|
yes |
| CO2_EMISSIONS_RANGE |
"CO2-Emissions-Current" and "CO2-Emissions-Potential" must be greater than or equal to -100 and less than or equal to 300 |
yes |
yes |
|
no |
| RELATED_PARTY_DISCLOSURE_CODED |
"Related-Party-Disclosure" must contain "Related-Party-Disclosure-Number" and must not contain "Related-Party-Disclosure-Text" |
yes |
yes |
yes |
no |
| IMPROVEMENTS_CODED |
"Improvement-Details" must contain "Improvement-Number" and must not contain "Improvement-Texts" |
yes |
yes |
yes |
no |
| ADDENDUM_MUST_NOT_BE_EMPTY |
If "Addendum" is supplied then it must not be empty |
yes |
yes |
|
no |
| VENTILATION_TYPE_UNSUPPORTED |
"Ventilation-Type" must be an integer and must not be equal to 9 |
yes |
yes |
yes |
no |
| LEGACY_FIELDS |
"Fans-Vents-Count", "Has-Special-Feature", "Special-Feature-Description", "Energy-Saved-Or-Generated", "Saved-Or-Generated-Fuel", "Energy-Used" and "Energy-Used-Fuel" must not be supplied |
yes |
yes |
yes |
no |
| COOLING_CLASS_OR_EEC |
At most one of "Cooling-System-Class" and "Cooling-System-EEC" may be supplied |
yes |
yes |
|
no |
| SINGLE_MAIN_HEATING_FRACTION |
If there is only one "Main-Heating" node then "Main-Heating-Fraction" must equal 1 |
yes |
yes |
|
no |
| SUPPLY_MAIN_HEATING_DECLARED_VALUES |
If "Main-Heating-Data-Source" is equal to 2 and "Efficiency-Type" is not equal to 4 then "Efficiency" within "Main-Heating-Declared-Values" must be supplied |
yes |
yes |
|
no |
| SUPPLY_SUMMER_WINTER_HEATING_EFFICIENCY |
If "Main-Heating-Data-Source" is equal to 2 and "Efficiency-Type" is equal to 4 then "Main-Heating-Efficiency-Winter" and "Main-Heating-Efficiency-Summer" must be supplied |
yes |
yes |
|
no |
| SUPPLY_COMMUNITY_HEATING_DISTRIBUTION_LOSS_FACTOR |
If "Community-Heating-Distribution-Type" is equal to 5 then "Community-Heating-Distribution-Loss-Factor" must be supplied |
yes |
yes |
|
no |
| SUPPLY_ONE_AIR_CHANGE_RATE |
"Air-Change-Rates" must not be supplied in more than one "SAP-Special-Feature" |
yes |
yes |
|
no |
| SUPPLY_AIR_CHANGE_RATE_MONTHS_SEQUENTIALLY |
"Air-Change-Rate-Month" in "Air-Change-Rate" must be supplied in sequential order |
yes |
yes |
|
no |
| MAIN_HEATING_SYSTEMS_INTERACTION_REQUIRES_TWO_HEATING_SYSTEMS |
If there is only one "Main-Heating" node then "Main-Heating-Systems-Interaction" must not be supplied |
yes |
yes |
|
no |
| UNSUPPORTED_FUEL_TYPE |
"Main-Fuel-Type", "Secondary-Fuel-Type" and "Water-Heating-Fuel" must not be equal to 1, 2, 4, 10, 11, 12, 13 or 14 |
yes |
yes |
yes |
no |
| UNSUPPORTED_LEVEL |
"Level" must not be equal to 99 |
yes |
yes |
yes |
no |
| ROOM_TOO_HIGH |
"Room-Height" within "SAP-Floor-Dimension" must be less than or equal to 10 |
yes |
yes |
|
no |
| MUST_HAVE_STOREYS |
"Storey-Count" must be greater than 0 |
yes |
yes |
|
no |
| DETACHED_HOUSE_HEAT_LOSS |
If "Built-Form" is equal to 1 then the sum of "Heat-Loss-Perimeter" values must be greater than or equal to 5 |
yes |
yes |
|
no |
| SUPPLY_HEAT_EMITTER_OR_HEATING_FRACTION |
If either "Main-Heating-Category" is equal to 3, 4 or 8, or "Main-Heating-Category" is equal to 2 and "Main-Fuel-Type" is equal to 3, 17, 18, 19, 26, 27, 28, 29, 34, 35, 36 or 37, then either "Heat-Emitter-Type" must not be equal to 0 or "Main-Heating-Fraction" must be equal to 0 |
yes |
yes |
|
no |
| UNSUPPORTED_SPACE_HEATING |
"Space-Heating-With-Loft-Insulation", "Space-Heating-With-Cavity-Insulation" and "Space-Heating-With-Loft-And-Cavity-Insulation" must not be supplied |
yes |
yes |
yes |
no |
| UNSUPPORTED_IMPROVEMENT_CATEGORY |
If "SAP-Version" is not equal to 9.80, 9.81, 9.82, 9.83 or 9.90 then "Improvement-Category" must not be equal to 1, 2, 3 or 4 |
yes |
yes |
yes |
no |
| UNSUPPORTED_SAP_TRANSACTION_TYPE |
SAP "Transaction-Type" must not be equal to 3, 4, 7, 9 or 10 |
yes |
yes |
yes |
no |
| UNSUPPORTED_RDSAP_TRANSACTION_TYPE |
RdSAP "Transaction-Type" must not be equal to 3, 4 or 7 |
yes |
yes |
yes |
no |
| SUPPLY_WALL_THICKNESS |
If "Wall-Thickness-Measured" is equal to 'Y' or 'y' then "Wall-Thickness" must be supplied |
yes |
yes |
|
no |
| SUPPLY_ALTERNATIVE_WALL_THICKNESS |
If "Wall-Thickness-Measured" within "SAP-Alternative-Wall" is equal to 'Y' or 'y' then "Wall-Thickness" must be supplied |
yes |
yes |
|
no |
| SUPPLY_MULTIPLE_BUILDING_PARTS |
If "Roof-Room-Connected" is equal to 'Y' or 'y' then more than one "SAP-Building-Part" must be supplied |
yes |
yes |
|
yes |
| INVALID_VALUES_FOR_EXTENSIONS |
If "Extensions-Count" is equal to 0 then "Roof-Construction" must not equal 7 and "Floor-Heat-Loss" must not equal 8 |
yes |
yes |
|
no |
| SUPPLY_GROUND_FLOOR_CONSTRUCTION_INSULATION |
If "Floor" is equal to 0 and "Floor-Heat-Loss" is equal to 1, 2 or 7 then "Floor-Construction" and "Floor-Insulation" must be supplied |
yes |
yes |
|
no |
| INVALID_CONSTRUCTION_FOR_ROOM_IN_ROOF |
If "SAP-Room-In-Roof" is supplied then "Roof-Construction" must not be equal to 3 |
yes |
yes |
|
no |
| ROOF_CONSTRUCTION_MUST_BE_FLAT |
If "Roof-Insulation-Location" is equal to 6 then "Roof-Construction" must be equal to 1 |
yes |
yes |
|
no |
| MAIN_HEATING_INVALID_FOR_NO_HEATED_ROOMS |
If "Heated-Room-Count" is equal to 0 then "SAP-Main-Heating-Code" must be supplied and must be equal to 699 within a "Main-Heating" node where "Main-Heating-Number" is equal to 1 |
yes |
yes |
|
no |
| TOO_MANY_HEATED_ROOMS |
"Heated-Room-Count" must not be greater than "Habitable-Room-Count" |
yes |
yes |
|
no |
| FLAT_LOCATION_MUST_MATCH_LEVEL |
If "Flat-Location" is equal to -1 then "Level" must be equal to 0 and vice versa |
yes |
yes |
|
no |
| HEAT_LOSS_PERIMITER_TOO_LOW |
"Heat-Loss-Perimeter" must be greater than 0 |
yes |
yes |
|
no |
| FLOOR_MUST_BE_ZERO_FOR_BUILDING_PART |
All "SAP-Building-Part" nodes must have a "SAP-Floor-Dimension" node where "Floor" is equal to 0 |
yes |
yes |
|
no |
| ONLY_CAVITY_WALLS_SUPPORT_CAVITY_INSULATION |
If "Wall-Insulation-Type" is equal to 2 then "Wall-Construction" must be equal to 4 |
yes |
yes |
|
no |
| SUPPLY_UNHEATED_CORRIDOR_LENGTH |
If "Heat-Loss-Corridor" is equal to 2 then "Unheated-Corridor-Length" must be supplied and must be greater than 0 |
yes |
yes |
|
no |
| WALL_AREA_MUST_BE_POSITIVE |
"Wall-Area" must be greater than 0 |
yes |
yes |
|
no |
| ROOF_INSULATION_INVALID_FOR_FLAT_ROOF |
If "Roof-Construction" is equal to 1 then "Roof-Insulation-Location" must be equal to 4 or 6 |
yes |
yes |
|
no |
| GROUND_FLOOR_HEAT_LOSS_ON_UPPER_FLOOR |
If "Level" is greater than 1 and "Building-Part-Number" is equal to 1 then "Floor-Heat-Loss" must not be equal to 7 |
yes |
yes |
|
yes |
| CORRIDOR_MUST_BE_UNHEATED_FOR_SHELTERED_WALL |
If "Sheltered-Wall" is equal to 'Y' or 'y' then "Heat-Loss-Corridor" must be equal to 2 |
yes |
yes |
|
no |
| ROOM_IN_ROOF_FLOOR_AREA_MUST_BE_POSITIVE |
"Floor-Area" within "SAP-Room-In-Roof" must be greater than 0 |
yes |
yes |
|
no |
| WALL_U_VALUE_TOO_HIGH |
"Wall-U-Value" must be less than or equal to 2.5 |
yes |
yes |
|
no |
| SUPPLY_FLAT_ROOF_DATA |
If "Roof-Construction" is equal to 1 and "Roof-Insulation-Location" is equal to 6 then either "Flat-Roof-Insulation-Thickness" or "Roof-U-Value" must be supplied |
yes |
yes |
|
no |
| HORIZONTAL_WINDOW_MUST_BE_ROOF_WINDOW |
If "Orientation" within "SAP-Window" is equal to 9 then "Window-Type" must be equal to 2 |
yes |
yes |
|
no |
| INVALID_DOOR_COUNT |
"Door-Count" and "Insulated-Door-Count" must be less than or equal to 20, and "Insulated-Door-Count" must be less than or equal to "Door-Count" |
yes |
yes |
|
no |
| SUPPLY_DOOR_U_VALUE |
If "Insulated-Door-Count" is greater than 0 then "Insulated-Door-U-Value" must be supplied and must be greater than 0 |
yes |
yes |
|
no |
| GLAZED_AREA_REQUIRES_WINDOWS |
If "Glazed-Area" is equal to 4 or 5 then at least one "SAP-Window" must be supplied |
yes |
yes |
|
no |
| INVALID_SECONDARY_HEATING_TYPE |
"Secondary-Heating-Type" must not be equal to 692 or 693 |
yes |
yes |
|
no |
| INVALID_HEATING_FOR_SINGLE_METER |
If "Meter-Type" is equal to 2 then "SAP-Main-Heating-Code" must not be equal to 401, 402, 404, 408, 409, 421 or 422 |
yes |
yes |
|
no |
| UNHEATED_ROOMS_MUST_HAVE_HEATING |
If "Main-Heating-Category" is equal to 1 within a "Main-Heating" node where "Main-Heating-Number" is equal to 1 then "Heated-Room-Count" must not be greater than 0 |
yes |
yes |
|
no |
| SECOND_HEATING_SYSTEM_UNSUPPORTED |
If "Main-Heating-Category" is equal to 1 within a "Main-Heating" node where "Main-Heating-Number" is equal to 1 then no "Main-Heating-Number" may be equal to 2 |
yes |
yes |
|
no |
| INVALID_METER_TYPE_FOR_HEATING_CODE_192 |
If "SAP-Main-Heating-Code" is equal to 192 then "Meter-Type" must be equal to 1, 3 or 5 |
yes |
yes |
|
no |
| TOTAL_STORE_VOLUME_TOO_LOW |
If "Combined-Cylinder" is equal to 'Y' or 'y' and "Dedicated-Solar-Volume" is greater than 0 then "Total-Store-Volume" must be greater than "Dedicated-Solar-Volume" |
yes |
yes |
|
no |
| SUPPLY_BOILER_FLUE_TYPE |
If "Main-Heating-Category" is equal to 2 and "Main-Fuel-Type" is equal to 17, 18, 26, 27, 28, 34, 35, 36, 37 or 51 then "Boiler-Flue-Type" must be supplied |
yes |
yes |
|
yes |
| INVALID_HEATING_CODE_FOR_NO_FUEL_TYPE |
If "Main-Fuel-Type" is equal to 0 then "SAP-Main-Heating-Code" must be equal to 310 or 699 |
yes |
yes |
|
no |
| INVALID_WATER_HEATING_CODE_FOR_NO_FUEL_TYPE |
If "Water-Heating-Fuel" is equal to 0 then "Water-Heating-Code" must be equal to 953 or 999 |
yes |
yes |
|
no |
| SUPPLY_SECONDARY_FUEL_TYPE |
If "Secondary-Heating-Type" is supplied then "Secondary-Fuel-Type" must be supplied |
yes |
yes |
|
no |
| SUPPLY_IMMERSION_HEATER_TYPE |
If "Water-Heating-Code" is equal to 903 then "Immersion-Heater-Type" must not be equal to 'NA' |
yes |
yes |
|
yes |
| INVALID_PITCH_FOR_ND_ORIENTATION |
If "Orientation" within "PV-Array" is equal to 'ND' then "Pitch" must be equal to 1 |
yes |
yes |
|
no |
| TOO_MANY_BATH_OR_SHOWER_ROOMS |
"Rooms-With-Mixer-Shower-No-Bath" plus "Rooms-With-Bath-And-Mixer-Shower" must not be greater than "Rooms-With-Bath-And-Or-Shower" |
yes |
yes |
|
no |
| MUST_SUPPLY_RATINGS_AND_COST |
"Energy-Rating-Average", "Lighting-Cost-Current", "Lighting-Cost-Potential", "Heating-Cost-Current", "Heating-Cost-Potential", "Hot-Water-Cost-Current" and "Hot-Water-Cost-Potential" must be greater than 0 |
yes |
yes |
|
no |
| DO_NOT_USE_NR_VALUE |
"Built-Form", "Floor", "Construction-Age-Band", "Improvement-Type", "Green-Deal-Category", "Previous-EPC-Checked" and "Previous-EPC-Exists" must not be equal to 'NR' |
yes |
yes |
|
no |
| ROOF_CONSTRUCTION_MUST_BE_PITCHED |
If "Roof-Insulation-Location" is equal to 5 then "Roof-Construction" must be equal to 4, 5 or 6 |
yes |
yes |
|
no |
| INVALID_ROOM_IN_ROOF_INSULATION |
"Insulation" within "SAP-Room-In-Roof" must not be equal to 1 |
yes |
yes |
yes |
no |
| SUPPLY_FLOOR_U_VALUE_OR_INSULATION_THICKNESS |
"Floor-U-Value" and "Floor-Insulation-Thickness" must not both be supplied |
yes |
yes |
|
no |
| SUPPLY_ROOF_U_VALUE_OR_INSULATION_THICKNESS |
Only one of "Roof-Insulation-Thickness", "Rafter-Insulation-Thickness", "Flat-Roof-Insulation-Thickness", "Sloping-Ceiling-Insulation-Thickness" or "Roof-U-Value" may be supplied |
yes |
yes |
|
yes |
| SUPPLY_WALL_U_VALUE_OR_INSULATION_THICKNESS |
Only one of "Wall-U-Value" or "Wall-Insulation-Thickness" may be supplied |
yes |
yes |
|
no |
| SUPPLY_ROOF_INSULATION_THICKNESS_OR_ROOM_IN_ROOF |
Only one of "Roof-Insulation-Thickness" or "Room-In-Roof-Details" may be supplied |
yes |
yes |
|
no |
| SUPPLY_ALTERNATIVE_WALL_U_VALUE_OR_INSULATION_THICKNESS |
Only one of "Wall-U-Value" or "Wall-Insulation-Thickness" within "SAP-Alternative-Wall" may be supplied |
yes |
yes |
|
no |
| SUPPLY_HEATING_INDEX_NUMBER_OR_CODE |
Exactly one of "Main-Heating-Index-Number" or "SAP-Main-Heating-Code" must be supplied |
yes |
yes |
|
no |
| INVALID_MAIN_HEATING_INDEX_NUMBER |
"Main-Heating-Index-Number" must be a number greater than 0 |
yes |
yes |
|
no |
| INVALID_FGHRS_INDEX_NUMBER |
"FGHRS-Index-Number" must be greater than 0 |
yes |
yes |
|
no |
| MUST_HAVE_FIXED_LIGHTING_OUTLETS |
"Fixed-Lighting-Outlets-Count" must be greater than 0 |
yes |
yes |
|
no |
| INVALID_ADDENDUM_NUMBER |
"Addendum-Number" must not be equal to 2, 3, 7 or 13 |
yes |
yes |
yes |
no |
| ROOM_TOO_LOW |
"Room-Height" must be greater than 0 |
yes |
yes |
|
no |
| INVALID_METER_TYPE_FOR_HEATING_CODE_193 |
If "SAP-Main-Heating-Code" is equal to 193 or 195 then "Meter-Type" must be equal to 1, 3 or 4 |
yes |
yes |
|
no |
| INVALID_ROOF_CONSTRUCTION_FOR_SLOPING_CEILING_INSULATION |
If "Roof-Insulation-Location" is equal to 7 then "Roof-Construction" must be equal to 8 |
yes |
yes |
|
no |
| INVALID_INSULATION_LOCATION_FOR_SLOPING_CEILING_ROOF_CONSTRUCTION |
If "Roof-Construction" is equal to 8 then "Roof-Insulation-Location" must be equal to 4 or 7 |
yes |
yes |
|
no |
| CO2_EMISSIONS_PER_FLOOR_AREA_RANGE |
"CO2-Emissions-Current-Per-Floor-Area" must be greater than or equal to -100 and less than or equal to 450 |
yes |
yes |
|
no |
| DATES_BEFORE_CERTIFICATION_DATE |
"Inspection-Date", "Registration-Date" and "Completion-Date" must not be before "Certification-Date" |
no |
yes |
|
|
| CERTIFICATION_DATE_MUST_NOT_BE_IN_FUTURE |
"Certification-Date" must not be in the future |
no |
yes |
|
|
| INSPECTION_DATE_LATER_THAN_COMPLETION_DATE |
The "Completion-Date" must be equal to or later than "Inspection-Date" |
yes |
yes |
|
yes |
| COMPLETION_DATE_LATER_THAN_REGISTRATION_DATE |
The "Completion-Date" must be before or equal to the "Registration-Date" |
yes |
yes |
|
yes |
| SUPPLY_INSULATION_OR_U_VALUE_FOR_CAVITY_WALL |
If "Wall-Construction" is equal to 4 and "Wall-Insulation-Type" is equal to 1 or 3 then either "Wall-Insulation-Thickness" or "Wall-U-Value" must be supplied |
no |
yes |
|
|
| MUST_HAVE_WWHRS |
If "WWHRS-Index-Number1" or "WWHRS-Index-Number2" is supplied then "Has-WWHRS" must be supplied and must be equal to 'true' |
no |
yes |
|
|
| SUPPLY_CHARGING_LINKED_TO_HEAT_USE |
If "Community-Heating-Distribution-Type" is equal to 5 or 6 then "Charging-Linked-To-Heat-Use" must not be supplied |
no |
yes |
|
|
| NO_PREVIOUS_EPC |
If "Previous-EPC-Exists" is not equal to 'Y' then "Previous-EPC-Reason-Code" must not be supplied |
yes |
yes |
|
|
| INVALID_COUNTRY |
"Property address must be in England, Wales, or Northern Ireland" |
yes |
yes |
|
yes |