ventilated
Germs can spread easily when people are sitting close together in warm and unventilated rooms.
Most of the people in the village still prepare their meals in small, unventilated huts.
They were kept waiting for over half an hour in an unventilated room.
They had assumed that it was better to be on deck in the open air than in the dark and unventilated cargo holds.

SMART Vocabulary: related words and phrases

Parts of buildings: vents & ventilation
air con
air conditioner
air conditioning
air-conditioned
air-cooler
chiller
chimney
chimney pot
chimney stack
circulator
cooler
dehumidify
duct
ducting
extractor
flue
vent
ventilated
ventilation
ventilator