Healthy Homes investigates a structure’s ventilation. Increasing ventilation rates and air distribution often can be a cost effective means of reducing indoor pollutant levels.
When there are strong pollutant sources, local exhaust ventilation may be appropriate to exhaust contaminated air directly from the building. Local exhaust ventilation is particularly recommended to remove pollutants that accumulate in specific areas.
Attic soffits and ridge vents, when correct, work together to create airflow and exhaust the air in the house, avoiding air stacking.
Wind turbines use the power of the wind as a year round solution to draw air out of attic spaces.
HVAC systems should be designed, at a minimum, to meet ventilation standards. However, many systems are not operated or maintained to ensure that these design ventilation rates are provided. In many buildings, IAQ can be improved by operating the HVAC system to at least its design standard.