Category: Mold

Hazards of Mold in Your Ductwork

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Mold contamination within air duct systems can pose detrimental health effects to building occupants if left uncorrected.  If mold exists within your air ducts make a plan to investigate the source of the problem, isolate the problem area, and remove the contaminants.

Understanding Mold

Molds are part of the natural environment. Molds are fungi that can be found anywhere – inside or outside – throughout the year. About 1,000 species of mold can be found in the United States, with more than 100,000 known species worldwide.

When excessive moisture or water accumulates indoors, mold growth often will occur, particularly if the moisture problem remains uncorrected. While it is impossible to eliminate all molds and mold spores, controlling moisture can control indoor mold growth.  Molds are usually not a problem unless mold spores land on a damp spot and begin growing. They digest whatever they land on in order to survive. There are molds that grow on wood, paper, carpet, foods and insulation, while other molds feed on the everyday dust and dirt.

Since mold requires water to grow, it is important to investigate the source of the moisture to prevent mold growth.

Hazards of Mold in Your Ductwork

Ventilation systems are designed to distribute a recirculate air within a home.  If mold growth is within the ventilation system, or near an air intake, mold spores can be spread throughout a home.

“Toxic mold syndrome” remains controversial and unproven, but experts agree that it’s best to limit exposure to molds.  The most likely adverse reaction to mold is a respiratory allergic reaction in mold-sensitive people. These reactions are similar to other respiratory allergies, causing sneezing, watery eyes, nasal discharge and congestion.

Cleaning Air Ducts

Consider having the air ducts in your home cleaned if there visible mold growth inside hard surface (e.g., sheet metal) ducts or on other components of your heating and cooling system.

There are several important points to understand concerning mold detection in heating and cooling systems:

  • Many sections of your heating and cooling system may not be accessible for a visible inspection, so ask the service provider to show you any mold they say exists.
  • You should be aware that although a substance may look like mold, a positive determination of whether it is mold or not can be made only by an expert and may require laboratory analysis for final confirmation.
  • If you have insulated air ducts and the insulation gets wet or moldy it cannot be effectively cleaned and should be removed and replaced.
  • If the conditions causing the mold growth in the first place are not corrected, mold growth will recur.

Dangers of Air Duct Cleaning Chemicals

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Air duct cleaning service providers may tell you that they need to apply a chemical biocide to the inside of your ducts to kill bacteria (germs), and fungi (mold) and prevent future biological growth.   Careful consideration should be taken before allowing the application of chemicals within your air ducts.  Due to the varying ranges of temperature, humidity and air turbulence there are very few chemicals that are approved for the use within ventilation systems.

Chemical Off Gassing

Organic chemicals are widely used as ingredients in cleaning and sanitizing products.  Volatile organic compounds (VOCs) are emitted as gases from certain solids or liquids.   Even a nearly odorless material can cause significant problems when re-circulated through air ducts in a closed environment.  VOCs include a variety of chemicals, some of which may have short- and long-term adverse health effects.

NADCA’s Position Regarding the Use of Antimicrobials

The National Air Duct Cleaners Association’s new position regarding the use of antimicrobial chemicals is as follows: “At this point in time, until EPA clarifies their position, NADCA does not recommend the use of any sanitizer or disinfectant products in air ducts.” This position was adopted to generate awareness among NADCA members of the potential legal liabilities they face by selling and applying antimicrobial chemicals. This is strictly a matter of managing legal risks. NADCA’s position deals specifically with sanitizers and disinfectants, not with any other product claims. Also, this position covers only air ducts, not HVAC components such as coils

No EPA Registered Products for Fiberglass Air Ducts

There are no products that are currently registered by EPA as biocides for use on fiberglass duct board or fiberglass lined ducts so it is important to determine if sections of your system contain these materials before permitting the application of any biocide.

If  You Choose to Use Chemicals in your Air Duct Cleaning Project

  • Review the product sheet showing usage and application of the product.
  • Review the Material Safety Data Sheet (MSDS) to understand if chemicals will cause any health or property concerns.
  • Review the Fact sheet on the product classification being applied.

If You Have a Problem Related to Chemicals Applied Within Your Air Ducts

  • Open doors and windows to ventilate the area with fresh air.
  • Operate the fan of the HVAC system
  • Exit the premises if negatively affected.
  • Contact and Industrial Hygienist to discuss the problem.  Be sure to have a copy of the MSDS.

How Humid Climates Affect Indoor Air Quality and Comfort

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Regional climate plays a large role in Indoor Air Quality and comfort.  Regional climate characteristics are determined by geographic location and long term weather conditions.  Two of the most important factors that affect an areas climate are temperature and precipitation.

What makes Humid Climates Uncomfortable?

Humid climates have a high amount of water vapor in the air.  When it’s hot, high humidity makes people feel hotter because it reduces the ability to evaporate moisture from the skin.  In humid climates, becoming comfortable means going into a conditioned space.

Potential for Mold Growth

While mold spores are in every region and every climate, mold growth is highly dependent on the amount of humidity.  Mold growth typically occurs when an environment reaches a relative humidity of 60 percent or greater in a 72 hour span.  If mold is found within your home or workplace remediate the problem immediately, mold spores can be distributed throughout the home or building through the HVAC system impacting indoor air quality.

Air Conditioning in Humid Climates

Air conditioning coils serve a very important role in regulating temperature and humidity in humid climates.  As air passes through the evaporative coil of the air conditioner, heat and moisture are removed from the air.  To a degree, the lower the humidity level, the more comfortable you will feel at a given temperature.

Air Duct Cleaning and HVAC Maintenance

Overtime foreign debris is drawn into the evaporative coils and fan blower of the air conditioning system, gradually decreasing air flow and energy efficiency.  Maintaining HVAC system, will keep your cooling and heating components operation at peak energy efficiency, and prevent potential indoor air quality problems.  Yearly air conditioner inspections and routine air duct cleaning with assure maximum efficiency.

Ventilation System Mold Remediator

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Local HVAC System Cleaning Contractor Achieves Prestigious Certification

WASHINGTON, DC – Local contractors Edward Frisk, and Jason Erb of Ductworks, Inc. have successfully completed the training and examination process to be certified as a Ventilation System Mold Remediator. The certification, which is administered by NADCA – The HVAC Inspection, Maintenance and Restoration Association, is recognized worldwide as the hallmark of the HVAC industry’s most qualified and reliable mold remediation professionals.

“While achieving the VSMR certification takes commitment on the part of an HVAC professional, the certification itself is a commitment to consumers of reliable, best-in-class service,” explained NADCA Executive Director John Schulte. “NADCA membership and the VSMR certification mean that a professional is dedicated to providing state-of-the-art service to their customers.”

Edward Frisk, and Jason Erb are now one of roughly 250 VSMR-certified professionals in the world.

HVAC system cleaning is the process by which heating, air conditioning, and ventilation systems are cleaned to remove excessive accumulations of dust, debris, and biological contaminants. Ventilation system mold remediation specifically addresses cleaning and removing biological contaminants within an HVAC system. With heightened public awareness of the dangers of indoor air pollution and the need for home energy efficiency, the demand for professional HVAC system inspection and cleaning has increased dramatically. The NADCA Certification Program helps to ensure that members of the association possess the required knowledge and expertise to perform these services in a competent and professional manner.

NADCA recommends that homeowners and building managers have their HVAC systems inspected annually and cleaned as needed. For more information regarding the benefits of professionally performed HVAC inspection and maintenance, contact Edward Frisk, and Jason Erb of Ductworks, Inc.

About Ductworks, Your Air Duct Cleaning Expert

Ductworks, Inc. “Your Air Duct Cleaning Expert” is a Denver-based company founded in 1990 to improve indoor air quality for homes and businesses. Their patented system of scraping and vacuuming is the most effective process for air duct cleaning. They have more technicians certified by the NADCA than any company in Colorado and provide customers with before and after photos to insure top quality performance.

About NADCA:

NADCA – The HVAC Inspection, Maintenance and Restoration Association was formed in 1989 as the National Air Duct Cleaners Association, and has since expanded its mission to become a trusted advocate for consumers and the industry on environmental and health issues surrounding heating, ventilation and air conditioning (HVAC) systems. NADCA was the first organization to develop industry-standard best practices and its standard for “Assessment, Cleaning & Restoration of HVAC Systems” is in use in more than 30 countries worldwide as a best practice and/or basis for national law. NADCA has more than 1,000 corporate members and more than 1,500 individuals certified as Air System Cleaning Specialists, Ventilation Inspectors or Ventilation System Mold Remediators. For more information or to find a NADCA-certified contractor near you, visit www.NADCA.com.

Allergen Test Kit Featured on FOX 31 KDVR Martino TV

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Ductworks, Inc. and National Jewish Health Featured On FOX 31 / KDVR: Martino TV

Consumer advocate Tom Martino featured the Family Air Kit®, an allergen and mold Test Kit,  developed by National Jewish Health that tests for substances that can cause allergic and asthmatic reactions.

Tom Martino and  Paula Haddock interviewed Jeffery Nathanson, the Executive Director of Business Development and Eddy Frisk, of Ductworks, Inc. to discuss the benefits of the Family Air Kit®

The Family Air Kit® is a cost effective and accurate means of testing the indoor air quality of your home or business.   The Family Air Kit® tests the longitudinal effect of dust in the home.

Ductworks, Inc. and National Jewish Health provide a comprehensive approach to controlling symptoms for people who suffer from allergies and asthma.

Green Air Duct Cleaning


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Green air duct cleaners employ advanced methods and materials specifically for green cleaning.   They make an extra effort to not allow any dust to escape outdoors or indoors, and only use natural cleaning products.

Clean & Maintained Air Duct Cleaning Equipment

Green air duct cleaning companies ensure that equipment is cleaned and maintained to prevent introducing contaminants into the home or business.  HEPA vacuums require routine inspection to ensure that the filter is properly sealed and operating at peak performance.  HEPA filtered vacuums to prevent dust from being re-released into the air.

No Dust Escapes

No dust should enter your home or be released outside during the air duct cleaning process. Green air duct cleaning companies use source removal cleaning procedures to mechanically agitate and HEPA vacuum debris from the wall of the air ducts.

Green Cleaning Products

Cleaning solvents are needed to clean debris air vent vent registers and furnace components.  Only non-toxic, biodegradable, non-corrosive, non-flammable, environmentally safe cleaning products are to be used.

Limited Use of Sanitizers

Sanitizing agents should  ONLY be used if there is microbial problem. Any sanitizer used in the HVAC system must be specifically registered by the EPA or other applicable regulatory agency for the use in HVAC systems.

Never Use Scented Sprays

Green air duct cleaning companies never use scented spays within air ducts.  A proper cleaning of the air vents will remove the debris harboring the odor.  Scented sprays mask odors, and can potentially cause an adverse reaction to home or building occupants.

How Indoor Air Quality Affects People

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The greatest difficulty in solving indoor air quality problems is that effects on people can vary.  One of a pollutant can have a completely different effect on two different people.  While pollutants found in indoor air can be responsible for many harmful effects, there is considerable uncertainty as to what concentrations or periods of exposure are necessary cause specific health problems.

Immunocompromised Individuals

People who are immunocompromised have an immune system that is compromised or entirely absent.  Indoor air quality is of great concern to those who are immunuocomprimised, as their bodies are very vulnerable to opportunistic infections.

Hypersensitivity

Some people can become sensitized to biological & chemical pollutants after repeated or high level exposures. Effects may show up after a single exposure or repeated exposures.  Once sensitized to a pollutant, the individual can experience acute adverse reactions when they are exposed to that pollutant, even when the pollutant is at a lower level.

Age Makes a Difference

Children are sensitive to indoor air quality because they breathe faster than adults, inhaling up to 50% more air per pound of body weight than adults.  Elderly have a higher risk for cardiovascular, respiratory illness from fine particle pollutions.

Allergies & Asthma

Dust is a mixture of many substances. Its content may vary from home to home, but the most common allergy triggers such as mold spores, pollen, dust mites, can trigger allergy or asthma attacks.

Fortunately for most healthy people, the symptoms of air pollution exposure usually go away as soon as the air quality improves.  Good housekeeping and good maintenance of the heating and air conditioning equipment is the most important methods for controlling exposure to indoor air pollutants.

Ductworks Collaborates with National Jewish Health® to Help Families Detect Allergens at Home

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Family Air Care Indoor Allergens & Mold Test Kit

Ductworks, Inc., is collaborating with National Jewish Health to provide a comprehensive approach to controlling symptoms for people who suffer from allergies and asthma. National Jewish has developed a diagnostic kit to assess the allergen levels in indoor environments.

Ductworks and National Jewish Health are working together on marketing and distribution of the Family Air Care® Indoor Allergens and Mold Test Kit. The kit, developed and serviced by National Jewish Health in Denver, determines levels of common indoor allergens and mold from dust samples taken inside a home, apartment or other building. The kit is now available through Ductworks for $299.

Once the diagnostic assessment of the home is complete, users can go to the Family Air Care® Website to learn how to lower allergen levels in their homes.

“The Family Air Care® kit is the only commercially available indoor-air testing kit that lets customers compare their results with samples from homes around the nation, and offers specific advice about how to interpret the results and what to do after receiving them,” said David Tinkelman, MD, Vice President of Health Initiatives at National Jewish Health.

To use the Family Air Care® Indoor Allergens and Mold Test Kit, consumers simply attach a small capture device to their vacuum-cleaner hose, briefly run the vacuum cleaner in their homes, then mail the collection device to National Jewish Health in a pre-paid envelope provided with the kit. Test results are reported in a secure e-mail. The kits can be ordered online at www.Ductworks.com.

“The Family Air Care®assessment benefits all households, but is especially important to the 70 percent of households where a person with allergies and/or asthma lives,” said Dr. Tinkelman. “The U.S. Department of Health and Human Services recommend that people with allergies and/or asthma reduce levels of allergens and irritants in their homes to improve their health.”

About National Jewish Health

National Jewish Health is known worldwide for treatment of patients with respiratory, immune and related disorders, and for groundbreaking medical research. Founded in 1899 as a nonprofit hospital, National Jewish Health provides the best integrated and innovative care for patients and their families.

For 12 consecutive years, U.S. News & World Report has ranked National Jewish Health the No. 1 respiratory hospital in the nation. Scholarly publisher Thomson Scientific has ranked National Jewish among the 25 most influential research institutions in the world in its areas of focus. Further information can be found by visiting www.nationaljewish.org.

About Ductworks

Ductworks, Inc. “Your Air Duct Cleaning Expert” is a Denver-based company founded in 1990 to improve indoor air quality for homes and businesses. Their patented system of scraping and vacuuming is the most effective process for air duct cleaning. They have more technicians certified by the NADCA than any company in Colorado and provide customers with before and after photos to insure top quality performance. For more information on Ductworks and the Family Air Care Kit, go to www.ductworks.com.

10 Things You Should Know About Mold

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Mold occur naturally, and most common types of fungi are not hazardous to healthy individuals.  However, people with allergies, asthma or weakened immune systems are more likely to react to mold.  Listed below are 10 things you should know about mold according to the EPA.

  1. Potential health effects and symptoms associated with mold exposures include allergic reactions, asthma, and other respiratory complaints.
  2. There is no practical way to eliminate all mold and mold spores in the indoor environment; the way to control indoor mold growth is to control moisture.
  3. If mold is a problem in your home or school, you must clean up the mold and eliminate sources of moisture.
  4. Fix the source of the water problem or leak to prevent mold growth.
  5. Reduce indoor humidity (to 30-60% ) to decrease mold growth by: venting bathrooms, dryers, and other moisture-generating sources to the outside; using air conditioners and de-humidifiers; increasing ventilation; and using exhaust fans whenever cooking, dishwashing, and cleaning.
  6. Clean and dry any damp or wet building materials and furnishings within 24-48 hours to prevent mold growth.
  7. Clean mold off hard surfaces with water and detergent, and dry completely. Absorbent materials such as ceiling tiles, that are moldy, may need to be replaced.
  8. Prevent condensation: Reduce the potential for condensation on cold surfaces (i.e., windows, piping, exterior walls, roof, or floors) by adding insulation.
  9. In areas where there is a perpetual moisture problem, do not install carpeting (i.e., by drinking fountains, by classroom sinks, or on concrete floors with leaks or frequent condensation).
  10. Molds can be found almost anywhere; they can grow on virtually any substance, providing moisture is present. There are molds that can grow on wood, paper, carpet, and foods.

Source: EPA