They did not close the hole in the roof but left it open to admit air.

A window, cracked open to admit smoky air, faced south.

The driver can control the amount of braking effort by admitting more or less air to the train pipe.

It was an open ventilator, designed to admit air to the men in the car below.

The one on the left was open to admit air.

These doors stood open to admit both light and air.

One tiny, barred window admitted pale daylight and barely enough air.

Windows of the best cracked horn, admitting both sunshine and fresh air.

Along the east wall large openings had been excavated during the long years of peace to admit air and light.

The windows were opened slightly to admit fresh air into the room.