This is a question that 1DayWall often hears, and we have several good solutions: You can circulate warm or cool air from one room to another by using a Room Fan of 7-5/8″. Equipped with a 2-speed option, this fan allows you to adjust the air, transferring air to quickly change or maintain temperatures in adjoining rooms. The fan’s grille can be painted to match your interior style.
If you don’t think a fan is necessary, you can use ventilation grills, which will also work well for air circulation between adjoining rooms.