Air Duct Cleaning


It’s a fact of life that dust, debris, and hair build up in your air ducts. Removing it creates healthier air flow and reduces allergens in your home. In addition to improving your indoor air quality, duct cleaning also ensures that less debris falls back into your heating system, prolonging the life of your equipment. In short, air duct cleaning will help your heating and cooling equipment run more efficiently and save money on your energy bills.

When should I get my ducts cleaned?

Many Northwest homeowners have duct cleaning every two years. Homeowners may want to consider more frequent cleaning if the home contains smokers, shedding pets, water contamination or damage to the home or HVAC system, residents with allergies or asthma, recent home renovation or remodeling.

bellevue wa air duct cleaning company

Features and benefits

Reduces dust

Dust travels quickly and easily throughout your home through the air ducts. Cleaning that area of your home will cut down on interior contaminants.

Minimizes airborne contaminants

Dust mites, tobacco smoke, household mold, chemicals, airborne allergens, bacteria, animal dander and carbon monoxide circulate throughout your home and effect the health and comfort of you and your family.

Improves indoor air quality

Air duct cleaning can remove airborne contaminants which may help to alleviate allergy and asthma symptoms.

Saves energy & money

According to the EPA, a build up of .042 inches of dirt on a heating coil can result in a decrease of efficiency of 21%.

Extendeds equipment life

9 out of 10 system failures are caused by dirt and dust. One of the functions of the fan, located inside of your air handler, is to keep the heat exchanger cool. Accumulated dirt and debris can reduce the CFM (cubic feet of air per minute) as much as 50%. This is the most common cause of cracks in heat exchangers. By having your system cleaned, you may prevent premature breakdown of your heating and cooling system.


  • What should I expect during a duct cleaning?

    We use a portable HEPA (high efficiency particulate air) filtration system that connects to the duct work directly above the furnace. We run hoses to each register in the home, which pushes any debris through the ducts to the filter system we’ve attached to the duct work. This captures dust and debris before it gets into the furnace.

    The process usually takes around three hours, depending on how large the home is. Unlike truck-mounted duct vac systems, this system allows us portability and because the system is HEPA filtered, the air coming out of the system is actually cleaner than the air already inside of the home. This allows us to complete the duct vac without opening windows.

  • Can I add-on dryer vent cleaning?

    Absolutely! The dryer vent can be completed for an extra fee. Ask about that when we schedule your service.

  • How does duct vacuuming affect indoor air quality?

    Duct cleaning is key to improving indoor air quality, along with heating system maintenance, filter changes, and proper ventilation.

    According to NADCA, a typical single family home accumulates up to 40 pounds of dust, dander, mold, and chemicals annually through everyday living. Think of your heating system as a pair of lungs, breathing air in and out continuously. The contaminants are pulled into the heating system and recirculated back through the house 5 to 7 times per day. While many particles are excluded by the furnace filter, over longer periods of time, this re-circulation causes a build-up of contaminants in the duct work. This can aggravate asthma or allergies and potentially shorten your furnace’s lifespan.

  • I suspect I have leaky ducts—now what?

    The first step would be to perform your own visual inspection. If you see a duct that has come apart, put it back together. That is unusual, but it does happen. The best course of action is to call us for a home energy audit. During the audit, we use special diagnostic tools to determine duct pressures, air flow, and leakage. After the audit, we will have pinpointed the source of leaks in your home, and if you decide to proceed, we can then fix them. A good duct sealing evaluation should include:

    • Identification of duct leaks with diagnostic equipment
    • Duct sealing with mastic, metal-backed tape, or sealant
    • Airflow testing
    • Insulating ducts that are visible but not inside the main part of your house (unconditioned space such as an attic or crawlspace)
    • Testing of combustion appliances (gas/oil furnace, water heater) to make sure they are venting properly after ducts are sealed.
    • Addition of air returns, if needed
  • How do I know if my air ducts need repairs?

    The ducts that run through your house are a critical part of your forced air heating and cooling system. Ducts are often leaky, wasting up to 30% of the heating or cooling you create. You might suspect leaky ducts if you find:

    • Some rooms are too warm or too cold
    • You are maintaining the setting on your thermostat but your utility bills are climbing
    • Your cat really likes one spot on the floor and that spot feels warm (no joke!)
    • The furnace filter gets dirty very quickly, which may indicate leaks in return ducts
    • You see visible dust at your registers
    • There is no insulation on ducts that are visible in the house

Join the Guardian Maintenance Club

The equipment in your home needs to be maintained every year to keep your systems running efficiently and effectively. When you join the Guardian Maintenance Club, you save money on annual tune-ups and gain an ongoing discount you can use throughout the year.

Take care of your systems and keep them performing for years to come. Available for heating, cooling, tankless water heaters, generators and gas fireplace inserts.

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