Simple categories matching unventilated:

• environment,
• area,
• space,

Members with property unventilated:

• transport,
• cold_room,
• office_area,
• wall,
• attic,
• attic_wall,
• maintenance_pit,
• airtight_home,
• small_room,
• car_interior,
• cabinet,
• cupboard,
• garage,
• closet,
• trial_pit,
• storage_closet,
• basement,
• warm_room,
• tool_box,
• pit,
• car,
• house,
• rack,
• underground_enclosure,
• under_bed,