> For the complete documentation index, see [llms.txt](https://docs.altum.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.altum.ai/english/sustainability/nta-8800-energylabel-api/output-interpretation.md).
# Output interpretation
An explanation and interpretation of every feature outputted in the API response.
| Feature | Example | Explanation |
| ----------------------------------------- | ---------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| post\_code | 1234AB | Zipcode |
| house\_number | 1 | House number |
| house\_addition | A | House number addition |
| build\_year | 2001 | Construction year |
| inner\_surface\_area | 151 | Square meters livable space |
| house\_type | vrijstaand | House type: '2 onder 1 kap', 'hoekwoning', 'tussenwoning', 'vrijstaand' or 'appartement' |
| installation | 4 | see [Measures](/english/sustainability/sustainability-api/measures.md) |
| wall\_insulation | 2 | see [Measures](/english/sustainability/sustainability-api/measures.md) |
| roof\_insulation | 2 | see [Measures](/english/sustainability/sustainability-api/measures.md) |
| floor\_insulation | 2 | see [Measures](/english/sustainability/sustainability-api/measures.md) |
| living\_room\_windows | 2 | see [Measures](/english/sustainability/sustainability-api/measures.md) |
| bedroom\_windows | 1 | see [Measures](/english/sustainability/sustainability-api/measures.md) |
| shower | 0 | see [Measures](/english/sustainability/sustainability-api/measures.md) |
| ventilation | 1 | see [Measures](/english/sustainability/sustainability-api/measures.md) |
| solar\_panels | 4 | see [Measures](/english/sustainability/sustainability-api/measures.md) |
| solarpanel\_watt\_peak | 212 | Solar panel watt peak performance per m2 |
| CO2 | 3084 | The total CO2 emissions (see [CO2](/english/sustainability/sustainability-api/co2.md)) |
| definitive\_energy\_label | A | Definitive energylabel from RVO's EP-online |
| definitive\_energy\_label\_type | NEN7120 | Norm on which the definitive energylabel is based |
| definitive\_energy\_label\_validity\_date | 2030-12 | Validity end date of the given definitive energylabel |
| definitive\_BENG2\_score | 125 | Definitive energylabel BENG2 score from RVO's EP-online |
| current\_estimated\_energy\_label | A | Current estimated NTA 8800 energylabel with respect to the input based on housetype, buildyear, inner surface area and estimated or given measures |
| current\_estimated\_BENG1\_score | 118 | Current estimated BENG1 numerical score |
| current\_estimated\_BENG2\_score | 128 | BENG2 numerical score of the current estimated NTA 8800 score |
| estimated\_gas\_usage | 2172 | Estimated gas usage (m3) per year |
| estimated\_energy\_usage | 2800 | Estimated electricity usage (kWh) per year |
| estimated\_city\_heating\_usage | 1300 | Estimated heat consumption (GJ) per year |
| measures\_method | 1 | statistical based on def. BENG2 or def. energy label = 1,
supplemented/determined with external sources = 2, based on building regulations = 3, based on user input = 4
|
#### Example output
```
{
"Output": {
"post_code": "2771DS",
"house_number": 87,
"house_addition": null,
"build_year": 1961,
"inner_surface_area": 131,
"house_type": "vrijstaand",
"installation": 4,
"wall_insulation": 0,
"roof_insulation": 2,
"floor_insulation": 2,
"living_room_windows": 1,
"bedroom_windows": 1,
"shower": 0,
"ventilation": 0,
"solar_panels": 0,
"solarpanel_watt_peak": 212,
"CO2": 5292,
"definitive_energy_label": "C",
"definitive_energy_label_type": "NEN7120",
"definitive_energy_label_validity_date": "2030-12",
"definitive_BENG2_score": null,
"current_estimated_energy_label": "C",
"current_estimated_BENG1_score": 146,
"current_estimated_BENG2_score": 211,
"estimated_gas_usage": 3147,
"estimated_energy_usage": 3686,
"estimated_city_heating_usage": 0,
"measures_method": 1
}
}
```
---
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