Kitchen, bathroom, and laundry exhaust fans are part of the home’s spot ventilation system. “Spot ventilation” refers to local, room specific ventilation requirements. Fans in these areas are designed to remove the bulk of humidity in the room where it is being generated. This is an effective solution for moisture generated by cooking, washing, and bathing, but does nothing to address the normal accumulation of moisture due to breathing, mopping etc. Additionally, these fans are often noisy and inconvenient to be run as often as would be necessary to promote good ventilation. Although bathroom exhaust fans may be incorporated into a home’s general ventilation plan, special models that are quiet, energy efficient, and designed for long-term operation must be chosen.