economiser

/ɪˈkɑnəmaɪzər/
noun
  1. A device or system that reduces the amount of fuel, energy, or money used.
    • We bought an economiser for our home heating system to lower our gas bill.
    • An economiser in the boiler captures waste heat to improve efficiency.
    • The factory installed an economiser to cut down on electricity costs.
  2. A person who avoids waste and spends money carefully.
    • He's such an economiser that he reuses tea bags to save money.
    • As an economiser, she always looked for the best deals at the grocery store.
    • My grandmother was a true economiser, never throwing away anything useful.
Synonyms