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Verified Reviews for Air Duct Cleaning pros in O Fallon, MO

*The Angi rating for Air Duct Cleaning companies in O Fallon, MO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Air Duct Cleaning needs.

*The HomeAdvisor rating for Air Duct Cleaning companies in O Fallon, MO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Air Duct Cleaning needs.

Last update on October 09, 2025

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Air Duct Cleaning questions, answered by experts

Yes, it is essential to seal all duct leaks. Even small leaks in your ductwork can lead to energy waste, reduced efficiency, and decreased comfort in your home. Sealing all leaks, whether minor or significant, ensures that your HVAC system operates at its best, delivering conditioned air where needed without losses. This comprehensive approach to duct sealing is crucial for maximizing energy efficiency and maintaining a comfortable indoor environment.

You do need dampers in your HVAC system, but they do help to regulate airflow and give you better control of the temperature in each room of your home. Most HVAC systems will have dampers installed, but this isn't always the case. If you don’t have designated zones in your home, you’ll likely still have valve control dampers on your supply vents for manual control.

We love our pets, but a dog's fur, gums, teeth, and butt can all be sources of lingering smells that affect your home. If your dog is wet or dirty from playing outside, they can easily bring these scents into your house as well.

If you have a fresh air intake as part of your HVAC system, the interior vents should be near your furnace or other gas appliances inside your home. From the outside of your property, your HVAC fresh air intake location is usually near the ground (although it may also be higher up, like on the roof or attic).

Professional air duct cleaning takes two to five hours, depending on the size of your home and the extent of the cleaning. The ductwork in standard homes with total square footage of 1,500 to 2,000 will take closer to two hours. Larger homes with extensive return and supply ductwork—often over 3,000 square feet—can push up to five hours. Keep in mind that related cleanings and repairs in your HVAC system will add to this total and may require two visits.

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The O Fallon, MO homeowners’ guide to air duct cleaning services

From average costs to expert advice, get all the answers you need to get your job done.

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