Running a car in a garage is dangerous and should never be done for any length of time.

Running a car in a garage, even with the door open, can be deadly within minutes due to carbon monoxide poisoning. Carbon monoxide is an odorless, colorless gas that builds up rapidly in enclosed spaces. Even brief exposure can cause severe health effects or death. Always operate vehicles outdoors in well-ventilated areas.

Carbon Monoxide Poisoning Risks

    Immediate Effects:
  • Dizziness
  • Headache
  • Nausea
  • Confusion
    Long-term Exposure:
  • Brain damage
  • Heart problems
  • Death

Comparison of Garage Ventilation Methods

Method Effectiveness Safety Level Recommended Use
Open garage door Low Very unsafe Never
Box fan in doorway Very low Very unsafe Never
Carbon monoxide detector Monitoring only Still unsafe Never

Safe Alternatives for Warming Up Your Vehicle

  • Start car outdoors in driveway
  • Use remote start from inside house
  • Install block heater for cold climates
  • Consider electric vehicle for zero emissions

Emergency Response to Carbon Monoxide Exposure

  1. Get to fresh air immediately
  2. Call emergency services
  3. Seek immediate medical attention
  4. Ventilate area before re-entry

Prevention Tips

  • Never run car in garage, even with door open
  • Install carbon monoxide detectors in home
  • Have heating systems inspected annually
  • Keep garage door closed when car is running