Clean air ducts keep the air in your home healthier and help your heating and cooling system run efficiently. If your furnace filter is already dirty after a month, that is a good sign the ductwork needs attention. How often you should clean the ducts depends on several things:
Allergies
If someone in the household has allergies, you may want to have the ducts cleaned more frequently.
Pets
Homes with pets may need to have the ducts cleaned more often due to pet hair and dander.
Smoking
A household where smoking occurs will likely require more frequent cleanings.
Home Renovations
Construction generates a lot of dust from drywall, wood and other materials. If your home has recently been renovated—especially if there was asbestos abatement, lead paint removal, or significant dust—your air ducts should be cleaned.
Humidity
Homes with high humidity may need more frequent duct cleaning to prevent mold growth.
HVAC System Usage
Heavy usage of the heating and cooling system could necessitate more regular cleaning.
Dry Climate
Homes in a dry climate like ours may need more frequent duct cleaning, because airborne particles stay in circulation rather than settling.
New Home or New HVAC System
If you’ve just moved into a new home or installed a new HVAC system, it’s advisable to check and possibly clean the ductwork.
As a general guideline, the National Air Duct Cleaners Association (NADCA) suggests having your air ducts inspected every two years to assess the need for cleaning. Some experts recommend cleaning every 3-5 years, but this can vary based on the factors listed above.
If you notice signs like a musty or moldy smell when the HVAC system is running, visible mold inside the ducts, or an excessive amount of dust and debris, it may be time for a cleaning regardless of the last scheduled service.
A Note on What We Do
Grand Lake Plumbing & Heating does not offer duct cleaning, which is a separate specialist trade. NADCA’s directory is the place to find a certified cleaner.
What we do handle is the ductwork itself: inspecting it, sealing leaks and insulating runs through crawl spaces and attics. That work is often the better answer anyway, because leaking ducts pull dust into the system in the first place and add hundreds of dollars a year to heating bills. Our post on sealing air ducts covers what is involved. If the air quality itself is the worry, our indoor air quality page sets out the options.
