Spot ventilation controls the concentration of pollutants in the room they were emitted in and to minimize their spread into other parts of the house.
Natural ventilation, spot ventilation, and whole-house ventilation are the three primary types of ventilation. By eliminating indoor air pollution and/or moisture at its source, spot ventilation can increase the efficiency of natural and whole-house ventilation.
In a house that is built with energy efficiency, ventilation is crucial. Each home and each person have different needs for "proper" ventilation, both in terms of quantity and kind.
Varying families will have different occupant counts (people and animals), schedules, pastimes, health issues, and other preferences that will affect the selection and operation of ventilation systems.
Localized exhaust fans, like those used in restrooms and over cooking ranges, are a part of spot ventilation.
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