# Apartments The endpoint described in this section applies to **apartment units within multi-unit residential buildings**. These include: * Galerijflat * Portiekflat * Maisonnette * Benedenwoning * Bovenwoning * Portiekwoning The model assumes a **dwelling within a multi-unit residential building**, where roofs, walls, and installations may be shared with other units. The **position of the apartment within the building and the number of floors** are important factors, allowing the API to estimate insulation levels, heating systems, and other measures based on building characteristics and machine learning predictions. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.altum.ai/english/sustainability/nta-8800-energylabel-v2-api/apartments.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.