ventless

/ˈvɛntləs/
adjective
  1. Having no opening for air, gas, or liquid to escape or enter; not ventilated.
    • The ventless fireplace is safer for apartments because it doesn't need a chimney.
    • A ventless gas heater can be dangerous if not used properly.
    • They installed a ventless dryer in the small laundry room.
Antonyms
What does "ventless" mean? | whatsthatwordmean | whatsthatwordmean