Frequently Asked Questions About Air Duct Cleaning

How are air ducts cleaned?

We use a powerful vacuum system that connects directly to your ductwork to create continuous suction throughout the cleaning process. At the same time, compressed air tools with specialized nozzles are inserted through vents and access openings to loosen dust, dirt, and debris from inside the ducts.

As contaminants are dislodged, they are immediately pulled into the vacuum system rather than released into your home or business. Every section of the ductwork is cleaned, including the supply and return ducts. We also thoroughly clean the blower (fan) and the cabinet that houses it to ensure the entire HVAC system is free of accumulated debris.

Will duct cleaning make my home or office dusty?

No. The cleaning equipment is designed to keep dust contained throughout the process. As debris is loosened inside the ductwork, it is continuously drawn into the vacuum system. When possible, the vacuum unit is positioned outside the building. If a portable unit is required indoors, it is equipped with HEPA filtration, which captures fine particles and exhausts only clean air.

Occasionally, a small amount of dust may fall when heavily soiled wall or ceiling registers are removed, but this is vacuumed immediately. In unfinished basements or crawl spaces, dust resting on the exterior of the ductwork may also be disturbed by vibrations during cleaning. If needed, we can protect nearby furniture and belongings with tarps before work begins.

Will you need to cut holes in my ductwork?

Yes. Creating access openings is a standard and necessary part of professional duct cleaning.

A larger opening—typically about 10 inches in diameter—is made to connect the vacuum hose to the system. Once cleaning is complete, this opening is sealed with a sheet metal access panel. A bead of silicone sealant is applied before the panel is secured with sheet metal screws, creating an airtight closure that can be reopened for future inspections or cleanings.

Additional access holes may also be required to reach all sections of the duct system. These are generally small (about 1 to 2½ inches) and allow cleaning tools and air nozzles to reach otherwise inaccessible areas. Afterward, they are sealed with airtight cap plugs. These openings also provide a way to visually inspect the interior of the ducts, which is the best way to verify the system has been thoroughly cleaned.

How much dust and debris will be removed?

The amount varies depending on the age of the building, the condition of the HVAC system, and the environment in which it has operated.

Over time, dust naturally settles inside ductwork, especially along the bottom of the ducts. Return ducts—which carry air back to the furnace or air handler—typically accumulate the most debris because they collect air from throughout the home before it passes through the filter.

The effectiveness of your air filter also plays a major role. Standard disposable filters capture only a small percentage of airborne dust, allowing much of it to circulate through the system. Higher-efficiency filters do a much better job of keeping ducts clean, but they cannot remove debris that has already accumulated. For this reason, many homeowners choose to upgrade their filter after having their ducts professionally cleaned.

Construction and remodeling projects can also introduce large amounts of dust and debris into the duct system. Activities such as drywall sanding, floor refinishing, or cutting wood can quickly contaminate ductwork if the HVAC system is operating. Even newly built homes often contain construction debris—including sawdust, drywall dust, paper cups, bottles, and other materials—left behind during the building process. A new HVAC system is not always a clean one.

How often should air ducts be cleaned?

For most homes and businesses, we recommend having the system inspected and cleaned every five to seven years, particularly if you’re using a high-efficiency air filter.

If your property has recently undergone remodeling, new construction, or any project that creates excessive dust, it’s a good idea to have the ductwork inspected afterward. Cleaning may be recommended depending on the amount of contamination found.

How long does duct cleaning take?

The length of the job depends on the size and complexity of the HVAC system.

As a general guideline:

• Systems with up to 10 registers can often be completed in about half a day.
• Systems with 15 to 25 registers typically require eight hours or more.

When estimating the size of a system, both supply and return registers should be included in the count. Larger homes may have multiple HVAC systems that require additional time. Factors such as tight crawl spaces, difficult access, or ducts lined with interior insulation can also increase the time needed to complete the cleaning safely and thoroughly.

What experience do you have?

I have more than 28 years of experience in duct cleaning, beginning in 1997 with Air Duct Cleaning Co., Inc. Over the years, my work ethic has helped grow this company through word-of-mouth referrals and trusted relationships with heating and air conditioning companies that know the quality of our services and rely on me to care for their customers. I have become the new owner of the business, continuing the same commitment to reliable, professional service under a new company name after the previous owner graciously entrusted the business to me.If you have a question that I haven’t answered here please feel free to call and get it answered.  (914) 763-6175