Push down on the bag to squeeze out excess air and seal with string.

The valve automatically releases excess air when pressure is too high.

Also, the evaluation of the dew point depends on the excess air.

Natural gas has different combustion efficiency curves linked to the temperature of the gases and the excess air.

For example, if the gases are chilled to 38 C and there is 15% excess air, then the efficiency will be 94%.

The lower the excess air, the "richer" the flame.

After bread has been left to rise, it needs to have the excess air knocked out of it before proving.

Seal as airtight as possible, pushing out any excess air.

Use of excess air will reduce the torque available for a given engine size.

Press hard enough to force the compound into surface pores and to squeeze out excess air.