The window had been raised to let the room air out, but it hadn't helped much.

It must be used carefully to avoid contamination with room air when injected.

They work by removing nitrogen from room air to make 94-98 percent oxygen.

That will heat them up more efficiently than room air will.

He slept six hours with the room air on low and was back on the road early.

Then he turned the room air to high and lay down on the bed to wait for Alice.

The room air was stale with the sweat of their effort.

Not literally, I mean, like a blanket, but to insulate the room air from the cold wall.

A sample is also collected from room air, for purposes of comparison.

After exercising, the athletes were provided with either room air or 100 percent oxygen.