The active windows help with ventilation and air circulation, and with cooling or heating between the rooms. They can be closed when necessary to block sounds from going through. The fan does a better job at this, but requires electricity, and the noise goes through it.
- Equipped with two fans in one unit, this fan can be used to draw in fresh, cool air from outside or to exhaust stale, hot air from inside out. It can even do both simultaneously thanks to its electrically reversible fans with independent controls.
- Each fan has three speed settings–low, medium, and high.
- Remote control.