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Introducing new unit enumerators

· One min read
epenet

As of Home Assistant Core 2026.7, the following unit constants are deprecated and replaced by a corresponding enum:

  • UnitOfDensity enumerator replaces mass over volume CONCENTRATION_*** constants ("g/m³", "mg/m³", "μg/m³", "μg/ft³")
  • UnitOfRatio enumerator replaces unit-less ratio CONCENTRATION_*** constants ("ppm", "ppb")

CONCENTRATION_PARTS_PER_CUBIC_METER was only used by a single integration and is deprecated without a replacement unit.

Please note that the use of PERCENTAGE constant is also deprecated when used as a unit of measurement, even if the constant itself is not deprecated.