Input lever
Brewer & Filter Setup
Wheel face
Upright / inverted orientation
Whether the AeroPress is brewed upright or inverted.
AeroPress Wheel Variable
Air expulsion
Brewer & Filter Setup · Input lever
Deliberately pushing out excess air before pressing.
Input lever
Brewer & Filter Setup
Detail panel
AeroPress-specific
Competition-relevant
Competition practice
Definition
Air expulsion is the deliberate removal of trapped air before flipping or pressing to reduce variability.
Why It Matters
It changes pressure onset and makes some inverted workflows more repeatable.
Used In Recipe Language Like
Gently push to expel air.
Synonyms
squeeze out extra air
Page Context
Air expulsion is part of the Brew Supply AeroPress Wheel and helps brewers describe deliberately pushing out excess air before pressing.
Related variables
Input lever
Brewer & Filter Setup
Detail panel
Chamber fill level
How full the chamber is during brewing.
Input lever
Brewer & Filter Setup
Detail panel
Plunger insertion depth
How far the plunger is inserted before brewing.
Input lever
Brewer & Filter Setup
Wheel face
Air gap
The volume of trapped air in the brewer.
Input lever
Brewer & Filter Setup
Wheel face
Seal quality
How well the plunger and chamber seal together.
Input lever
Brewer & Filter Setup
Wheel face
Cap type
The cap used on the AeroPress.
Affected outcomes
Measured metric
Cup Outcome
Wheel face
Beverage TDS
Measured total dissolved solids in the served beverage.
Calculated metric
Cup Outcome
Wheel face
Extraction Yield
Calculated percentage of coffee mass extracted.
Measured metric
Cup Outcome
Wheel face
Beverage Yield
The liquid beverage mass collected or served.
Cup outcome
Cup Outcome
Wheel face
Aroma
The smell of the brewed coffee.