Definition
Ventilation brings fresh outside air in while removing stale, contaminated air out. Proper ventilation improves indoor air quality and reduces moisture problems. Modern airtight construction needs mechanical ventilation to ensure adequate air exchange—you can't rely on leaky windows anymore.
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Proper ventilation removes contaminants and maintains indoor air quality. Ventilation rates are specified by building codes. Modern airtight homes require mechanical ventilation for adequate air exchange. Ventilation improves occupant health and comfort. Poor ventilation causes moisture and air quality problems.
Pro Tip
Ensure your home has adequate ventilation; stuffy modern homes with moisture problems usually need mechanical ventilation.
Example
A home with balanced ventilation system providing fresh air exchange throughout the house.