How to Control Grill Temperature with Your Vents
Quick answer: Use the bottom vent to set the temperature and keep the top vent at least partly open. Make small changes, then wait 10–15 minutes for the grill to settle before changing anything again.
Vent Settings by Temperature
- High heat, 450°F and up (searing steaks, burgers): bottom fully open, top fully open.
- Medium heat, 350–450°F (chicken, chops, fish, vegetables): bottom about ½ open, top open.
- Low heat, 225–275°F (ribs, brisket, smoking): bottom about ¼ open, top about ½ open.
Getting to Your Target Temperature
- Light the coals with both vents fully open. (See How to Start a Charcoal Grill.)
- Close the lid and let the grill heat up.
- When you're about 25°F below your target, start closing the bottom vent toward the setting above. It's much easier to stop a grill from climbing than to bring it back down.
- Wait 10–15 minutes, then check the thermometer.
- Fine-tune with the bottom vent in small moves, about a quarter of the way at a time.
Fixing Problems
- Too hot: close the bottom vent a little. Don't open the lid to cool it down; the extra air feeds the fire.
- Too cold: open the bottom vent a little. If the coals are mostly gray ash, add more charcoal.
- Temperature keeps swinging: you're probably adjusting too often. Make one small change and wait.
- Windy day: wind pushes extra air into the vents and makes the grill run hot. Turn the grill so the bottom vent isn't facing the wind, and close it a little more than usual.
Check the Right Temperature
The thermometer in the lid measures the air near the top of the grill, which can read differently from the cooking grate. A probe thermometer near the food is more accurate, and a meat thermometer tells you when the food itself is done.