1. having no vent or opening for air, gas, or steam to escape
Usage: technical

Examples

• The ventless gas fireplace doesn’t require a chimney.
• We installed a ventless dryer in the small apartment.
• The ventless design makes installation much easier.
• Ventless heaters are popular in mobile homes.
• The ventless system recirculates air instead of exhausting it outside.
• Safety concerns exist with some ventless appliances.