The General Rule: Every 3 to 5 Years
For a typical home with no pets, no smokers, and no recent construction, the duct cleaning industry generally recommends a cleaning every 3 to 5 years. That's the guideline commonly cited from the National Air Duct Cleaners Association (NADCA), and it's a reasonable starting point.
But "typical" doesn't describe a lot of households. Here's when you should think about cleaning sooner.
Clean Sooner If…
You have pets
Dogs and cats shed hair and dander that gets pulled into return vents every time the system runs. Homes with multiple pets often benefit from a cleaning every 2 to 3 years.
Someone has allergies or asthma
Ducts that hold dust, pollen, and dander keep recirculating it. Middle Tennessee's long pollen seasons don't help. Cleaning removes that reservoir.
You've remodeled
Any project that involved sanding drywall or floors should be followed by a cleaning. Read about post-construction duct cleaning.
You moved into a new or new-to-you home
New builds often have construction dust in the ducts. Older homes may have years of the previous owner's dust, pet hair, and smoke. Either way, it's smart to start fresh.
Someone smokes indoors
Smoke residue coats duct interiors and keeps the odor circulating.
You see or smell a problem
Dust puffing from registers, debris visible inside the vents, or a musty smell are reasons to act regardless of when the last cleaning was. See 8 signs your ducts need cleaning.
Why Murfreesboro Homes Can Need It More Often
In Rutherford County, the air conditioning runs from late spring well into fall, and the heat runs through winter. More runtime means more air, and more airborne dust, moving through the system each year. Humidity is also a factor: crawl-space and attic ducts can develop condensation in summer, which makes dust stick and can lead to musty odors.
What You Can Do Between Cleanings
- Change your filter on schedule, usually every 1 to 3 months depending on the filter and your household
- Make sure the filter fits snugly with no gaps around the edges
- Keep registers and returns uncovered by furniture and rugs
- Vacuum the vent covers when you clean the room
- Cover vents during home projects and turn the system off during heavy sanding
Frequently Asked
Can you clean air ducts too often?
Cleaning more often than you need to won't harm a properly cleaned system, but it isn't a good use of money. If you're unsure, ask for an inspection first.
How do I know when my ducts were last cleaned?
Often you don't, especially in a home you bought. Look for a service sticker near the air handler or filter rack, or ask us to inspect the ductwork and show you its condition.
Not sure if it's time? Call (615) 857-5923 for a no-pressure duct inspection.