Another crook had opened a front window, to let in fresh air.

He opened a window to let in air and the smell of rain, then looked around.

The screen could easily be folded aside to let in more light and air.

There are so few hotels nowadays where a person can let in fresh air.

Relieved of the baby's weight, I had put back the covers a bit to let in air.

The red ones are doors, which open to let in fresh air.

They have holes in the top of them so your feet can let in air.

The hatch had stayed open, to let in fresh air.

Some types have clerestories which let in light and air.

I had left the door ajar, to let in light and air.