How Long Does it Take to Clean Air Vents in a House?

Find out how long it takes to clean air vents in a house from our expert air duct cleaning technicians! Learn about factors affecting time needed for proper ventilation system maintenance.

How Long Does it Take to Clean Air Vents in a House?

According to our expert air duct cleaning technicians, it takes three to five hours to properly clean your air duct system. This includes the return side, the supply side, the fan compartment, the fan wheel, and the return tank. The exact amount of time it takes to clean the air ducts will depend on the size of your air conditioning system. Cleaning the air ducts of an HVAC system usually takes between three and seven hours, depending on their size.

Complete air duct cleaning for small properties measuring less than 3,000 square feet usually takes around three hours. By contrast, cleaning air ducts for larger properties that measure more than 3,000 square feet takes between three and five hours. Duct cleaning time varies depending on the size of your home. Most houses can be cleaned in about two hours. The technician can provide you with a more accurate estimate after visiting your home, but there are a few factors you can use to estimate the time.

If you or someone in your family has asthma or allergies, you may be considering cleaning your home's heating and cooling ducts. But even if you don't have special health problems, duct cleaning may appeal to you on an intuitive level. After all, if your ducts are clean, all the air coming out of the vents should also come out clean, right? While duct cleaning operations may insist that duct cleaning is essential to health, the evidence doesn't support their claims. Companies that perform duct cleaning often advertise health benefits or suggest that duct cleaning will reduce your energy bills by improving the efficiency of your system. Some ads even use language such as: “Studies have shown” but there is no data to support these claims.

Even if your ducts are dirty, cleaning them probably won't provide any measurable benefit. In fact, the little independent research done on duct cleaning indicates that the process removes so much dust that it creates a bigger problem than it solves. Although it intuitively makes sense to clean the ductwork, after all, the dust is removed and the rest of the house is cleaned, the fact is that the dust that settles in the ventilation system usually remains where it is and is unlikely to be carried through the air unless disturbed. Under most circumstances, dust is inert and harmless, and shaking it with cleaning equipment creates major problems. Little research has been done on the effects of duct cleaning. Government studies in the United States and Canada and health professionals who have researched duct cleaning fail to recommend it against it, but neither do they support it as a routine measure.

Researchers from the EPA and the CMHC used different methodologies. The CMHC study used several duct cleaning services. The companies were not informed that they were part of a study and the researchers did not control the time spent or the methods used. The EPA study prescribed and controlled the methods used in a smaller number of households. While the duct cleaning industry maintains that both studies are flawed, no other research has questioned the findings.

And while the equipment and methods used by duct cleaning companies have changed since these studies were conducted, household air ducts haven't.Changing air filters frequently is the best way to keep dust, allergens, and other particles out of your home. With a newly installed system or a system in a house you just moved to, check the filter once a month to determine how quickly it gets dirty at different times of the year. Most should be replaced every two to three months. Although not always part of their basic cleaning services, many duct cleaning companies often also clean heating and cooling equipment (heat exchangers, cooling coils, condensate drain containers, fan motors, fan blades, and fan housings). While much of the energy used to power heating and cooling equipment is wasted, that waste is due to inefficient equipment, poor insulation, leaks around doors and windows, and unsealed ducts. While cleaning and maintaining HVAC equipment has some benefits, those benefits are relatively small and energy waste can be attributed to dirty ducts or equipment.

The CMHC researchers found that when duct cleaners also cleaned the fan blades, there was a small reduction in airborne particles. Cleaning the fan could also slightly improve the system's energy efficiency. The same goes for the evaporator coils inside your home cooling system. Evaporator coils cause condensation which dehumidifies air before it circulates through your home. Condensed moisture can cause dust and other particles to adhere and collect on the coils.

In addition, cleaning the collection tray (and tray drain nozzle) located below the coils ensures that dirt does not accumulate and enter into your system. It also prevents water from accumulating on and under coils which can cause mold problems. Also consider inspecting your duct system for leaks as leaking ducts reduce efficiency and introduce air quality problems. If someone in your household has specific health problems such as allergies or asthma consult your doctor first. It is important to identify if there is a problem so that doctor can suggest alternatives to cleaning the ducts.

Start by identifying if your ducts are part of problem (probably aren't) and if cleaning them will help (probably isn't).If you suspect you have a mold problem either because of visible growth or because of musty smell that constantly comes from supply grilles cleaning the ducts won't do much good if you don't get rid of mold. Mold starts with moisture problem and the ducts themselves are unlikely to be source. The most likely culprits are cooling system's evaporator coils which your heating and air conditioning contractor and most duct cleaning companies can inspect and maintain. Leaky return ducts can also introduce moisture. Again if you suspect that there is mold problem consider having service company inspect the duct system for leaks. In conclusion changing air filters frequently is best way to keep dust allergens and other particles out of home while inspecting for leaks can help identify potential problems with mold growth or energy efficiency issues caused by dirty or unsealed ducts.

If someone in household has specific health problems such as allergies or asthma consult doctor first before considering cleaning. In most cases however evidence suggests that cleaning, while not harmful may not provide any measurable benefit.

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