# Primary heating system

Primary heating equipment type for the building (e.g., furnace, heat pump, boiler).

- API name: `primary_heating_system`
- Category: Property
- Type · unit: Text
- Addresses with a value: 41.5M (34.6%)
- Latest collection: Jun 1, 2026, refreshed every two months
- How values combine: Read from a single source field.
- Derivations:
  - Observed — the attribute is directly observed.

## Links

- [Catalog page](/catalog/v2/primary_heating_system)
- [Published statistics (JSON)](https://static.faraday.ai/figv2/primary_heating_system.json)
- [API reference](/docs/reference/getattribute)