Definition of ventless in US English:

ventless

adjective

  • See vent

    • ‘A ventless, propane heater offers ambience and all the heat we need, even at 20 below zero.’
    • ‘The pyroprocessing system featured a two-support rotary kiln with the ventless CFG Hybrid cooler.’
    • ‘I pace around the ventless room, trying to figure out where the gas is entering from, and what it could be.’
    • ‘A ventless sport coat, that hugs the body, is called a ‘Continental’ jacket.’