Ventilation when smoking: Open or closed?

Why does ventilation matter so much?

Not all smoke is created equal. When smoke lingers too long inside the cooking chamber, moisture condenses and creosotes form – those bitter, tar-like compounds that can make your meat taste absolutely awful. Smoke needs to flow, not sit still.

At the same time, you need enough smoke contact time for flavor to penetrate the meat. That balance is everything: fresh smoke in, spent smoke out.

Ventilation also directly controls your temperature. More air = more oxygen = more heat. Too little air and your fire will suffocate.

How to do it right

• At the start: Open vents to about 50% so temperature builds quickly and your wood or charcoal gets fully lit.
• During the smoke: Reduce to 20-30% – that's the sweet spot for most smoking sessions. Smoke moves slowly and evenly through the chamber.
• Temperature running too high (more than 10°C above target): Close the intake slightly, but keep the exhaust/chimney open.
• Temperature too low: Open the intake more – keep the exhaust open. Never close the exhaust to control temp, only use the intake for that.
• Exhaust (chimney) always stays open: At least 25-30% open so smoke can actually escape. Regulate temperature via intake, not exhaust.

Bottom Line

Ventilation while smoking means: exhaust always open, control temperature via the intake, and never close things down so much that smoke starts to stagnate.