1.   Ceiling fans circulated warm air around the room.

2.   In the winter, reversible ceiling fans can help circulate warm air and make furnace use more efficient.

3.   Draughts help to circulate air.

4.   The air was circulated mechanically.

5.   As mentioned earlier, commercial refrigeration relies on fans to circulate the air within the cabinet.

6.   Always leave a window open a few inches to circulate fresh air.

7.   As the storm circulates warm air into the region, snow levels will rise.

8.   A Bermuda high pressure system will circulate tropical air into the southeastern states, including Florida.

9.   A fan to circulate air will help, but as for those awkward areas, just stick out your neck and go to work with brush, or spray.

10.   A fan heater uses a bladed fan to circulate air through electrically heated metal or ceramic heating elements and into a room.