21.   High pressure over the western Atlantic will circulate air from the South toward the Atlantic Seaboard.

22.   Hot and very humid weather is expected along the Atlantic Seaboard as tropical air is circulated into the region ahead of a cold front.

23.   High pressure, centered over the northwest Plains will circulate chilly air from central Canada into the eastern half of the country.

24.   I believe that with the advanced state of this technology there is built into the system a provision to bring and circulate fresh air.

25.   In cold weather the ceiling fan can operate in reverse to circulate warm air downward from the ceiling.

26.   In the cold season, powerful winter storms transport frigid air equatorward while circulating warmer air toward the poles, helping to erase the natural global energy imbalance.

27.   In turn, these systems circulate warm air northward and cold air southward in a never-ending process aimed at smoothing out polar-tropical differences.

28.   It also has a heat exchanger to circulate warm air into the living room.

29.   It would simply circulate the air in the bathroom, which would do no good at all, even with the bathroom door open.

30.   Low pressure in New Brunswick will circulate chillier air into the Northeast on brisk northwesterly breezes.