There was generally a ventilator shaft through the wall that followed the north-south orientation of the house.

At last he ceased speaking and returned him to the ventilator shaft.

They were high up, in some kind of vertical ventilator shaft.

Among the fifty ventilator shafts, where would they choose to begin?

He fired again, darted behind a ventilator shaft and waited.

But I put three sacks of that money in a ventilator shaft.

Just an empty space between the ventilator shaft and the bulkhead.

Old building like this, Cardinal thought, you'd expect the ventilator shaft to be pretty grungy.

Being small, I got out through an old ventilator shaft.

For the berth connected with the ventilator shaft, and thus received air.