Fresh Air System (FAS)
Your fresh air ventilation system improves indoor air quality by bringing in outdoor air and reducing indoor air pollutants. To keep your home's air quality, keep your ventilation system running unless outdoor air quality is very poor.
Frequently Asked Questions
What does the Fresh Air System label mean? It means that you have a whole-house ventilation system installed to provide you with fresh air throughout the year.
Why do I need this system? Tight, durable, and energy-efficient homes need mechanical ventilation to provide enough fresh air to maintain acceptable indoor air quality; such systems are now required by code; the associated energy costs of operating are minimal compared to the overall health benefits.
How should I operate this system?In most cases, whole-house ventilation systems are designed to operate continuously and should only be turned off in the case of severe outdoor air contamination, such as a wildfire. This guidance is from American Society of Heating Refrigerating & Air Conditioning Engineers (ASHRAE) Guideline 24.
How should I maintain my whole-house ventilation system?Check with the manufacturer for recommended maintenance of your ventilation system, which, depending on the system, may include cleaning air inlets and outlets and replacing filters.
Does the U.S. DOE Weatherization Assistance Project provide whole-house mechanical ventilation systems? How can I apply?To apply for weatherization assistance, contact your state weatherization agency. DOE's Weatherization Assistance Program reduces energy costs for low-income households by increasing the energy efficiency of their homes, while ensuring their health and safety. The program provides weatherization services to approximately 35,000 homes every year.
Who can I contact with additional questions?Please contact the manufacturer of your individual ventilation system for additional information. For questions on HVI or the Fresh Air System label program please contact us.