A NADCA Certfied Air Duct Cleaning Company
A NADCA Certfied Air Duct Cleaning Company


Below are some frequently asked questions that may be helpful to you. If you still have any questions, please call us and we’d be happy to discuss.

  • According to the Environmental Protection Agency, duct cleaning generally refers to the cleaning of various heating and cooling system components of forced air systems, including the supply and return air ducts and registers, grilles and diffusers, heat exchangers heating and cooling coils, condensate drain pans (drip pans), fan motor and fan housing, and the air handling unit housing.

  • The EPA says if not properly installed, maintained, and operated, components of forced air systems may become contaminated with particles of dust, pollen or other debris. When moisture is present, the potential for microbiological growth, mold, increases and spores from such growth may be released into the home’s living space. Some of these contaminants may cause allergic reactions or other symptoms in people if they are exposed to them.
  • Chemical biocides, designed to kill microbiological contaminants, can be applied to the inside of the duct-work and to other system components in an attempt to treat mold. These practices have yet to be fully researched and you should be fully informed before deciding to permit the use of biocides or chemical treatments in your air ducts. Biocides should only be applied after the system has been properly cleaned of all visible dust or debris.

  • The EPA claims that no evidence suggests that such cleaning would be detrimental, provided that it is done properly. One may consider having their air ducts cleaned simply because it seems logical that air ducts will get dirty over time, and should occasionally be cleaned.
  • If a service provider fails to follow proper duct cleaning procedures, duct cleaning can cause indoor air problems. For example, an inadequate vacuum collection system can release more dust, dirt, and other contaminants than if you had left the ducts alone. A careless or inadequately trained service provider can damage your ducts or heating and cooling system, possibly increasing your heating and air conditioning costs or forcing you to undertake difficult and costly repairs or replacements.

    We are only 1 of 42 duct cleaning companies in Ontario that are certified by the National Air Duct Cleaners Association and have undergone extensive training to ensure we follow the proper protocols and methods mandated unto us to ensure you receive the service that your family deserves.

    Every technician we send to your home holds their own VMT, ASCS & VSMR certification from NADCA. We also have CVI (Certified Ventilation Inspectors) on staff that can also assess every HVAC system in every residential, commercial and industrial setting.

    We take our work very seriously and will always ensure we’re in the forefront of new and emerging technologies to deliver you the best possible service.

    Read a sobering article on what could happen to you and your neighbours if you choose an unqualified air duct cleaning contractor and the benefits of carbon monoxide detectors here.

  • There are several “checks” one can undertake to determine whether air duct cleaning is needed:

    • Presence of mold growth inside sheet metal ducts or on other components of the heating and cooling system.
    • Ducts are infested with vermin, e.g. (rodents or insects)
    • Ducts are clogged with excessive amounts of dust and debris and/or particles are actually released into the home from your supply registers.

    Still not sure if you need a cleaning? Read our article, 9 Ways To Tell if You Need Your Ducts Cleaned

  • There are some companies that characterize themselves as air duct cleaners, yet the services they provide are limited to “vent cleaning.” Rather than use compressed air and air agitators to clean the return and supply duct lines, in conjunction with cleaning inside the air vents, these companies will simply remove the grills/vents and clean inside the vents with a basic vacuum. This is an improper way to clean ducts and is not mandated by the National Air Duct Cleaners Association. Without targetting the dirt/dust/debris that has built up on the walls of the return and supply duct lines with compressed air, the duct system is not truly clean.

  • Many types of tools and equipment can be used to successfully clean an HVAC unit. Some companies use truck-mounted equipment and others use portable vacuums. NADCA standards state that, when used properly, both types of equipment can get the job done correctly.

    Read our article on Commonly Used HVAC Cleaning Equipment here.

    Dave’s Duct Cleaning performs our air duct cleaning service in accordance with NADCA standards.  We have earned and obtained all the necessary qualifications to assess, restore and maintain commercial, industrial and residential HVAC systems.  We will always send each customer NADCA certified technicians whom have obtained their own ASCS (Air Systems Cleaning Specialist), VSMR (Ventilation Systems Mold Remediator) and VMT (Ventilation Maintenance Technician) certifications from NADCA.  To learn more about these certifications, visit our NADCA information page.

    Should you have any further questions pertaining to a proper and thorough air duct cleaning service, please call 416-668-4607

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