Lint buildup in dryer vents is a leading cause of dryer fires. Regular cleaning and proper maintenance of the vent system greatly reduce this risk. Ensure the vent hose is made of a metal material (preferably rigid or semi-rigid aluminum). Plastic or foil hoses are more prone to kinking and lint buildup.
Optimal
Dryer vent is clean, clear of lint, and made of compliant metal materials. Regularly inspected and maintained.
Cautionary
Some lint buildup. Vent material may not be ideal (e.g., foil). Needs cleaning and potential material upgrade.
Hazardous / Out of Range
Significant lint buildup causing ventilation blockage. Vent material made of plastic, which is more prone to fire issues. Hose is meaningfully kinked or crushed, causing ventilation issues.