National Air Duct Cleaning Corp.
   Breathe Easier With Clean Air
We provide a broad range of products and services, all with a strong emphasis on superior quality, exceptional customer service and competitive pricing. We provide the services you need to maintain a comfortable living environment, day in and day out.


·        Residential and Commercial Air Duct Cleaning
·        Residential and Commercial Dryer Vent Cleaning
·        Furnace Cleaning
·        Air Exchanger Cleaning









·        A/C Clean and Check









·        Decontamination of Dust Mites on Bedding, Carpeting and Drapes









·        Sanitization of Air Passages









·        Refrigerator Coil Clean and Check









·        A-Coil Clean and Check









·        High Efficiency Filtration









·        Installation of Infrared (UV) Light for Continuous Sterilized Air









Residential Air Duct Cleaning







According to the American Lung Association, "Indoor Air Pollution is wide spread. You are more likely to get sick from pollution in your home and office than from pollution in the air outside." Your home's air is 5 to 100 times more polluted than outdoor air. Allergies and sinus conditions are commonly caused by mold in the ductwork, bacteria, viruses, fungi and dust mites in your home's air.

National Air Duct Cleaning uses the latest industry-recognized cleaning technology to rid your home of those bothersome pollutants and irritants. In the first stage we do a thorough inspection of your H.V.A.C. system prior to any cleaning. This allows us to educate our customers about the cleaning process and the benefits of the additional services that our company provides.

Then, our technicians thoroughly clean each individual opening (i.e. vents and returns) for all possible dust and debris. We use a rotating brush along with high-powered vacuum system to remove all irritants and pollutants. A high-efficiency particle air (HEPA) filter is used during the cleaning to control the removed debris from being re-introduced into your home. 

Our last and final stage involves a comprehensive re-inspection of your system during the re-assembly of the ductwork, to ensure the complete removal of all dust and any other particles. If any moisture is present, the potential for microbiological growth (i.e. mold and mildew) is significantly increased and the spores from such growth could be released directly into a home's living space. These microorganisms grow best at temperatures between 68 - 86 degrees Fahrenheit and prefer an environment that is damp and dark. That is why your system is obviously a perfect breeding ground for these harmful organisms! At that time we fog our decontamination treatment into your system to combat allergens and the other irritants commonly found in most heating and cooling systems.














Commercial Air Duct Cleaning














Having worked closely with Management Companies, Real Estate Developers, and Private Businesses, we recognize that commercial air duct cleaning needs are unique for each property owner. Commercial air duct cleaning often entails the use of special air duct cleaning equipment and diverse procedures. We possess the skills and knowledge necessary to approach each commercial air duct-cleaning job with an open mind and flexibility. Our attitude and professionalism are unparalleled. 

National Air Duct Cleaning Corp is eager to work closely with you to tailor our services to your commercial air duct cleaning needs. We understand how important it is to our clients to maintain their daily routines. We are therefore more than willing to schedule your commercial air duct-cleaning job at a convenient time, to minimize disruptions any to your business.














Our customers have included:














·        Condominium Associations














·        Apartment Complexes














·        Churches














·        Schools














·        Not-for profit Organizations














·        Correctional Institutions














·        Animal Care Facilities














                     And the list keeps growing……………..














See our testimonials page to see what our commercial customers are saying......

Why clean your commercial ducts?














·        Increased System Efficiency=Lower Energy Costs (For example, clogged coils run at least 20% less efficiently than clean ones and obstructions in supply branch lines will effect how long an air handler takes to heat or cool a space, which you pay for on the energy bill)    














·        Breathe Healthier Air














·        Reduce Dust Circulation   














·        Possibly Reduce Employee Sick Hours – Possible Reduction of Your Benefits Costs

·        Comfortable Employees are Productive Employees














·        Allow Your Customers to Feel More Comfortable When They Are In Your Building














·        Increase Airflow














·        In Very Extreme Cases, Avoid a Fire Hazard (In some commercial ventilation systems there is a fire damper or sprinkler system in the ventilation system by code)      














·        Protect Valuable Electronic Equipment from Damaging Dust        














·        Avoid Liabilities Created By Sick Building Illness

·        Comply with OSHA Guidelines








































Commercial Cleaning---Health Benefits

• One out of every six people who suffer from allergies does so because of the direct relationship to the fungi and bacteria in the air duct systems. (Total Health & Better Health Magazine)

• Children are more likely than adults to be affected by polluted air; they breathe faster, inhale more air per unit of body weight and are closer to the ground where concentrations are higher. (Department of Consumer Affairs)  

• 90% of heating and cooling system failures are caused by dust and dirt. ( Louisiana Cooperative Extension Service)

• The elderly, asthmatics and people with respiratory problems, such as allergies and lung diseases, are more sensitive to pollutants. (Department of Consumer Affairs)

• One millimeter of dirt on a heating or cooling coil can decrease its efficiency up to 21%. (Environmental Protection Agency)  

                              A DIME IS
                            LESS THAN
                      ONE MILLIMETER

• Most fiberglass furnace filters are only 7% effective in stopping dirt, dust, pollen, etc.
(American Society of Heat, Ref., Ac. Engineers)

• Most people spend 60 to 90% of their time indoors. (American Lung Association)

• 50% of all illnesses are either caused or aggravated by polluted indoor air.
( American College of Allergists)

• The average six-room house collects 40 pounds of dust each year.
(Discover Magazine)

• Air pollution contributes to lung disease, which claims close to 361,000 lives in America every year and is the third-leading cause of death in the United States. (American Lung Association)

• The U.S. Environmental Protection Agency ranks poor indoor air quality among the top five environmental risks to public health. (E.P.A.)         

Dryer Vent Cleaning – Residential and Commercial

National Air Duct Cleaning Corp. provides dryer vent cleaning services in St Louis and the surrounding areas. Do you have a clogged dryer vent duct? We have provided dryer vent cleaning services for hundreds of St Louis residences and many apartment and condominium complexes working with property managers and condominium associations, organizing services at the convenience of the residents. 

Dryer vent cleaning is important for both safety and economic reasons. Few people realize that dryer vent duct cleaning significantly reduces the risk of a dryer vent fire and improves the efficiency of the dryer, thereby lowering utility costs. According to the U.S. Consumer Product Safety Commission, there are an estimated annual 15,500 fires, 10 deaths, 10 injuries, and cases of carbon monoxide poisoning associated with improper maintenance of dryer vents. The financial costs come to nearly $100,000,000 per year. In many cases, injuries and death can be prevented with proper dryer vent cleaning. Not cleaning your dryer vent a risk you should not be willing to take.

Why Dryer Vent Fires Occur  

In today's homes, apartments, and condos, dryer vents tend to be vented longer distances, creating more places for lint to gather. Although dryers are equipped with lint traps, a significant amount of lint is not caught by the trap, and instead, builds up inside the dryer. In addition to creating a fire hazard, if your dryer vent duct is too long or has too many bends, it will cause your dryer to take much longer than necessary to dry loads, using more energy and electricity.

inadequate clearance space between the dryer and the wall can cause the dryer to work inefficiently. Many people create problems by putting their dryer against the wall crushing the venting material in the process. The cumulative effect of reduced airflow and the resulting lint buildup prevent the dryer from drying at a normal rate and risk causing a fire. 

Why Dryer Vent Cleaning is Important  

According to the Fire Department, your dryer vent exhaust duct should be professionally cleaned once to twice a year. Not only does dryer vent cleaning help ensure the safety of your family and your home, but economically; dryer vent cleaning can result in improved efficiency of the washer/dryer. This improved efficiency helps cut down on the cost and energy spent operating the dryer, perhaps extending the dryer's useful life.

How we Perform Dryer Vent Cleaning

National Air Duct Cleaning Corp. efficiently cleans your dryer vent eliminating even the most compact debris, including layers of bird's nests.  In fact, if you have had problems with birds entering the dryer vent duct and creating nests, inquire about a bird guard. Depending on the severity of the clog, the length of the dryer duct and the height of the outlet, the average cleaning lasts approximately 15 minutes to an hour.  


1.      EXCESSIVE DRYING TIME. When your vents are clean, your dryer operates more efficiently, and the clothes dry faster. You save wear and tear on your dryer.  

2.      BREAKDOWNS. The cleaner the vent, the less strain there is on your dryer, so the motors and electrical circuits last longer. And you don't have to spend as much on repairs or replacements.  

3.      HIGH UTILITY BILLS. When your dryer is running at peak efficiency, it costs you less to operate.  

4.      FIRE. Overloaded vents and overworked dryers can be a dangerous combination. With a clean dryer vent, you eliminate the overloading and overwork, and lower the risk of fire. 

In addition, to our duct cleaning services, we provide:

Furnace Cleaning
We clean and lubricate the blower assembly, and also the pilot light assembly and the burners. In addition we check the bearings and the belt, and most importantly, we check for gas leaks and a cracked heat exchanger. This is done by HVAC certified personnel. (Manufacturers recommend a yearly cleaning)

Air Exchanger
We clean filter, heat exchanger, blower components, draft compartment, cleaning all airflow passages. This is done by HVAC certified personnel. (Manufacturers recommend a yearly inspection)

 A/C Clean & Check
The housing unit will be removed and will be cleaned with a condensing cleaning solution from the inside out, then all components will be cleaned and checked and inspected, and Freeon levels checked. This is done by HVAC certified personnel. (Manufacturers recommend a yearly inspection)

Decontamination of Dust Mites on Bedding, Drapes, and Carpeting

Dust mites are microscopic organisms closely related to spiders and ticks. Dust mites thrive in the warm, humid, dark conditions inside of the fibrous materials that fill our homes: bedding, upholstered furniture, carpet, stuffed toys and old clothing. Dust mites are scavengers that feed primarily on the dead skin that falls off the bodies of humans and animals. So, it's no wonder that they crowd around the places where we spend most of our time. It's not actually the dust mites that cause the sneezing, coughing, runny noses, stuffy noses, and the congestion that plagues 20 million Americans. It's their even smaller waste particles. While the dust mites are feasting on dead skin cells deep inside our pillows, mattresses, and carpet, the things we do everyday like walking across the room, turning over in bed, and vacuuming stir up dust mites' tiny waste particles for us to breathe.

Are Dust Mites Causing My Allergy Symptoms?
The short answer is quite possibly, yes. Remember that dust mites are microscopic organisms that love warm, humid and fibrous environments where there is plenty of food (they primarily eat our shed, dead skin and other organic matter like mold spore). Although they avoid human contact, dust mites rapidly produce a waste product that is easily inhaled. And regardless of how well you clean, dust mites are simply a part of the environment and therefore extremely prevalent in almost all homes.

"The most important factor in an environmental control program is avoidance of dust mite allergen. Sensitivity to dust mite antigen is a strong predictor of asthma and asthma severity, and reducing dust mite allergen exposure in the home can reduce the
severity of asthma, eczema, and allergic rhinitis... Household areas with the highest levels of dust mite infestation include the following: carpets, pillows, mattresses, drapes, stuffed animals, clothing, and upholstered furniture."

Jeffrey A. German, Michael B. Harper. “Environmental control of allergic diseases." American Family Physician. August 1, 2002.

We discussed the importance of controlling dust mite allergen in mattresses, pillows and other bedding since your bed and bedding meets all the criteria they love. Their other favorite places include carpeting, sofas and even that favorite overstuffed TV chair in the family room.


A gram of house dust (approximately half of a teaspoon) contains as many as 1,000 dust mites. That same gram of dust can hold 250,000 of their fecal pellets. 

Sanitization of Air Passages
Once your air ducts have been cleaned, we will apply a sanitizing fog to assure that we have any remaining destroys all bacteria, dust mites, fungi, mold mildew, allergens in ductwork. Recommended for those with allergies and/or asthma and other chronic illnesses. (recommended every time your air duct work is cleaned)

To further protect your family and pets, National Air Duct     cleaning Corp uses ONLY all natural, environmentally responsible (green), hospital grade products to sanitize your HVAC system. 

We use a Tea Tree Oil based product that actually boosts your immune system.  It will combat any virus, bacteria or fungus including Methicillan-resistant Staphylcoccus-aureus (M.R.S.A. –the so-called, hospital killer bug), and dust mites, whose presence is known to cause “asthma” and other respiratory irritations in people.

Additionally, this odor-neutralizing product will leave your ventilation system free of musty odors from mold, mildew, smoke, pet urine, and other typical household odors. 

Refrigerator Coil Clean & Check
A cleaning of coil elements in back of the refrigerator removing dirt, dust and debris. A dirty coil causes the refrigerator to work harder and increase energy cost while decreasing efficiency. (Manufacturers recommend cleaning every 6 months)

A-Coil Clean & Check
The A-Coil is a separate component inside the furnace. Also known as the evaporator coil, the "A" coil resembles two car radiators, which have been leaned together to form a capital letter "A". All year long air blows through these coils, with dust dirt and debris accumulating on the bottom side. In the summer this part is cold and is used to create cold air. In the winter months, warm air blows through it to heat your house. Our technicians unscrew and pull it partially out to access and clean. The dirty A-coil will be cleaned by applying a solution that dissolves, breaks down and released the dirt and debris. The residue is then vacuumed with a high-pressure hose. This is a no rinse process.  (Clean yearly)


High Efficiency Filtration
Whether you have allergies or just want to extend the cleanliness and efficiency of your system.  This premium quality filter will keep your system clean and free of irritants for years to come. This high performance lifetime furnace filter replaces a standard low efficiency 'throw away' filter with no modification to the system.

    Benefits You Can Live With!!

  • Cleaner air to breathe

  • No harmful ozone emissions

  • Reduces pollen, dust and airborne pollutants

  • Reasonably priced

  • Less housecleaning

  • Never needs replacing

  • Anti-microbial filter media

  • Lifetime warranty

  • High dust & particle holding capacity

CLEANING IS QUICK & EASY - When cleaned as directed, your filter will give you many years of trouble free use. Failure to properly clean the filter may lessen filter effectiveness, and as with any air filter, it is possible for an excessive dirt buildup to cause airflow resistance sufficient to damage other ventilation components. Depending on your specific situation the filter should be cleaned every 4-6 weeks.

    • Simply remove the air filter

    • Flush with water in opposite direction of air flow arrows then rinse other side.

    • Rinse thoroughly to remove remaining dirt.

    • Drain excess water and reinstall.

The air you breathe contains many irritants such as pollen, dust, bacteria, mold
spores, pet dander and smoke. Most of these particles are smaller than one
micron. Your filter is an effective and efficient way to  reduce the number of these particles in your air.

Installation of Infrared Light for Continuous Sterilized Air

For many years, ultraviolet light has proven effective in sterilizing medical equipment, purifying water and processing food. Currently, the use of UV lights is gaining industry acceptance in HVAC applications.  Microbe Management, Inc., a testing agency in Greenville, NC, has conducted three separate tests to examine UV’s effect on indoor air quality. The test results reviewed in this article conclude that UV is an integral part of a whole house approach to improving Indoor Air Quality. While experts disagree on the root causes of many IAQ problems, there is consensus that stopping problems at the source is crucial to long-term air quality improvement. First, the homeowner must eliminate any unwanted sources of moisture in the home such as roof leaks and drainage problems. Likewise, the air conditioning coil must be addressed since it is a natural breeding ground for molds, which thrive in a dark, moist environment. Familiar with the rank smell generated when switching from air conditioning to heat mode? That is the smell of mold and bio-film burning off the coil. Whenever the blower is engaged, mold spores from contaminated A-coils are released into
the ductwork and distributed throughout the building. These spores then seek alternative surfaces in other parts of the home to breed and multiply.

Attack the Source

A specific test was designed to determine UV’s effectiveness in treating mold on coil surfaces. The test simulated the damp, dark settings where A-coils are found. In this study “We took a standard A-coil, sterilized it, introduced two kinds of mold and then placed it in a controlled, moisture-laden environment,” says Bernard Kane, of Microbe Management. “We created two separate chambers in our lab. One chamber was bathed in UV light. The other was not.” The results were dramatic and conclusive. The side of the A-coil that was exposed to the ultraviolet light was clean and clear of mold growth. Mold continued to grow unabated on the side without UV. Subsequently, the contaminated side was bathed in UV light and the mold was eradicated. Kane summarized the results: “Properly positioning a UV lamp over the A-coil in a residential or commercial air conditioning system can eliminate surface mold on the coil and prevent future mold growth as well.” 
Further resources:  
    Frequently Asked Questions
    Independent Lab Test



Our family, proudly serving your family and business.

Call for an appointment today!

(314) 447-3828  1-888-447-DUCT

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