Every home requires some sort of ventilation for proper air quality.
A ventilator can save more energy than by simply opening a window. Instead of opening a direct line to the outdoors it makes sense to try and recover some of the energy used to heat or cool your home. A ventilator also provides piece of mind as well. Instead of opeing a window to introduce fresh air in the home which may pose some security risks, a ventilator will be operating out of sight to constantly provide the fresh air your home needs. Experts recommend one complete fresh air exchange in your home every three hours.