They'd been waiting in there to be told to let air out of this tire or that.

It is letting air out of the stomach through the mouth.

I kept my windows down and let hot air in the car.

He or she then puts a tube into the opening to let air in.

They walked toward the great windows, cracked open to let air into the room.

It seems like common sense - open a window to let air in and get the smoke out.

In summer the roof slides open to let hot air out.

Some houses, however, are better than others at letting outside air in.

Up until then, we will have been letting air out all over the place.

If no, make sure the valve can open to let air through from the pump.