Question 1

How much should air duct cleaning actually cost?

Accepted Answer

For a single-system home of roughly two thousand square feet, honest source-removal pricing in these markets generally lands between three hundred and seven hundred dollars, with additional systems and additional vents priced separately. Anything advertised under one hundred and fifty dollars is a lead price that will be revised upward on site. Use the flat-price filter above, and read each company's standard-home definition before you compare numbers.

Question 2

How often do air ducts need cleaning?

Accepted Answer

There is no evidence-based fixed interval, and the EPA explicitly declines to recommend one. Clean when there is a reason: visible mould on duct surfaces or the coil, rodent or insect infestation, a completed renovation that put drywall dust or sawdust into the system, a newly purchased home with unknown history, or measurable debris blowing from registers. In practice most homes land somewhere in a three to seven year window.

Question 3

What is NADCA, and does membership matter?

Accepted Answer

NADCA is the National Air Duct Cleaners Association, the trade body that publishes the ACR standard the industry is measured against. Membership requires at least one certified Air Systems Cleaning Specialist on staff and a commitment to that standard. It is a meaningful filter but not a guarantee, because a firm can hold membership through a single certified owner who never appears on a job. That is exactly why this directory tracks the number of certified technicians separately from membership itself.

Question 4

Should the evaporator coil be cleaned at the same time?

Accepted Answer

Usually yes, and in humid markets almost always. The coil is the coldest and wettest surface in the system and the place biological growth starts. Cleaning the ductwork while leaving a fouled coil in place means re-contaminating the runs you just paid to have cleaned. Ask whether coil cleaning sits inside or outside the quoted flat price, because it is one of the most common upsells in the trade.

Question 5

Can duct cleaning damage my system?

Accepted Answer

It can, and the risk is real rather than theoretical. Rotary brushing inside flexible duct can tear the inner liner, turning a cleaning job into a replacement job. Aggressive work around an evaporator coil bends fins and restricts airflow. Access openings that are cut and then poorly sealed create permanent leakage into an attic or crawlspace. Matching method to duct type is the mark of a competent contractor, which is why the source-removal filter on this page lists individual methods rather than treating them as interchangeable.

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