ERU most commonly signifies Emission Reduction Unit , a carbon-credit term used in emissions trading, where one ERU represents one metric ton of carbon dioxide reduced. It can also mean different things depending on context, such as Emergency Response Unit or Equivalent Residential Unit.

Quick meaning

  • In climate/carbon markets: ERU = Emission Reduction Unit.
  • In emergency services: ERU can mean Emergency Response Unit.
  • In utilities/engineering: ERU may mean Equivalent Residential Unit.

Context matters

If you saw ERU in a forum, article, or workplace document, the surrounding topic usually tells you which meaning is intended. In carbon-policy discussions, it almost always points to Emission Reduction Unit.

Short answer

If you mean the most common formal usage, ERU signifies Emission Reduction Unit.