By Mr. B · Published 2026-07-29 · Updated 2026-08-04
Fire Management Lesson
Airflow & Venting
The intake and exhaust vents on your smoker or grill are your two biggest temperature control tools. Learn how to use them together to manage fire and smoke quality.
LevelBeginner
Learning PathFire Management
Lesson8 of 18
Key Concepts
- Intake vent (bottom): controls how much oxygen feeds the fire
- Exhaust vent (top or chimney): controls how quickly air and smoke exits the pit
- Both vents must stay partially open for a clean, stable fire
- Closing the exhaust traps smoke and creates dirty, bitter flavor on the meat
- Fully closing the intake starves the fire and causes white smoke
Put It Into Practice
- Always keep the exhaust vent fully open or close to fully open during the cook. It is a smoke quality tool, not a temperature tool.
- Use the intake vent to control temperature. More open equals higher temp. More closed equals lower temp.
- Start both vents at 50% open. Let the pit stabilize, then adjust only the intake to hit your target.
- If you are getting thick white smoke: both vents need more airflow. Open them up and let the fire clean up.
- To lower a running-hot pit: close the intake by 25% at a time. Wait 10 minutes before adjusting again.
- In cold or windy conditions: position the smoker so wind does not blow directly into the intake or exhaust.
Mr. B's Pitmaster Note
Many beginners close the exhaust to slow a fast-running pit — this traps smoke and produces a creosote flavor that gets worse as the cook goes on. Always control temperature through the intake. The exhaust stays open.
Use your equipment manufacturer's instructions, keep the cooker outdoors on a stable noncombustible surface, and verify food temperatures with a calibrated thermometer.