"remove any debris blocking the vents"

• the opening of a volcano, through which lava and other materials are emitted

  "pumice fragments pile up to form a conical heap round the vent"

• a flue of a chimney
• the touch hole of a gun
• the anus, especially one in a lower animal such as a fish that serves for both excretion and reproduction

"children give vent to their anger in various ways"

"he's been venting his frustration on social media"

"tumble-dryers must be vented to the outside"

• discharge or expel (air, gas, or liquid) through an outlet

  "the plant was isolated and the gas vented"

• permit air to enter (a beer cask)

  "once the beer has been vented, the cask must be sold within three or four days"