Dryer Duct Cleaning

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Dryer Duct Cleaning

Did you know that a clogged dryer vent can cause a fire inside of your home? According to the U.S. Consumer Product Safety Commission, more than 15,000 fires are sparked every year by clothes dryers. Excess lint (which is highly combustible) and debris build up in your dryer vent, which reduces air flow to the dryer which backs up the dryer exhaust gases, causing a fire hazard. Most dryer duct lines run between the walls and floors of a home and this fire can quickly spread through the rest of the home. Luckily, these fires can easily be prevented by following a few helpful tips and cleaning your dryer duct vent regularly.


Although clothes dryers have a lint trap, a significant amount of lint bypasses the trap and finds its way into the dryer and the dryer vent duct.  Within less than a year a significant amount of lint can build up and can block the flow of air through the dryer and dryer vent duct. With the warm moist air being dispersed as well into the dryer duct this further aids in the lint clogging the dryer duct.

Plugged or partially plugged dryer vents can also result in increased operating costs with longer drying times.  This will also cause premature failure of components of the dryer.  Overheating can also cause unnecessary wear and tear on clothing, thus shorting their life.

Signs it is time to clean your dryer vent:

·         Clothing remains damp or does not dry completely after a full drying cycle.
·         Drying time for clothing exceeds 35 to 40 minutes in duration.
·         A musty odor that lingers in the clothing following the drying cycle.
·         Clothing seems unusually hot to the touch after a complete drying cycle.
·         The dryer vent hood flap does not properly open as it is designed to do during the operation of the dryer.
·         Debris is noticed within the outside dryer vent opening.
·         Excessive heat is noticed within the room in which the dryer is being operated.
·         Large amounts of lint accumulate in the lint trap for the dryer during operation.
·         A visible sign of lint and debris is noticed around the lint filter for the dryer.
Excessive odor is noticed from dryer sheets that are used during the drying cycle.

Here are some steps homeowners should take to prevent dryer vent fires:

·         Clean the lint screen before/after drying every load of laundry.
·         Clean the dryer vent and exhaust duct (hose connected to the dryer) annually.
·     Check and clean the outside dryer vent exhaust for obstructions and make sure the flapper opens and closes properly. If the flapper is not fully closing, birds and rodents can nest in the dryer vent line.
·       Clean behind and around the dryer where lint can build up. Keep the area around the dryer clean and free of lint and clutter.
·        Replace old style flexible plastic/vinyl hose with corrugated or foil hose. The plastic/vinyl hose is no longer allowed in most states and is a fire hazard.
·   The interior of the dryer chassis should be cleaned by a qualified service person periodically. Lint and debris will build up inside the dryer as well as in the dryer duct.
·     Limit the use of dryer sheets used when drying clothing. Instead of dryer sheets for liquid fabric softener.
·      When possible hang clothing such as heavy bedding, pillows and other large articles outside to line dry.

Make sure that you hire a professional to clean your dryer duct vent for you. Although, there are many DIY vent cleaning kits out there, they usually are not as effective as the tools used by the professionals. By hiring a professional, they not only have the experience which ensures that it will be done efficiently but also you have the reassurance that it will be done properly and safely.
Visit Comprehensive Mold Management's website for more information at www.compmold.com

Air Duct Cleaning Process - Direct Contact & Negative Air

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Air Duct Cleaning Process

There are several different procedures to clean air ducts, however Comprehensive Mold Management only uses the proper techniques to ensure it is done correctly and efficiently. We use two different methods depending on the design and layout of the home, these methods include direct contact and negative air. (Both methods are equally efficient.)

These are the steps we use to ensure the air ducts in each home are cleaned properly:

Step 1: Clean the furnace/air conditioner.
  • After testing the system for proper operation, we will disconnect the power before opening the unit for safety.
  • Vacuum the interior surfaces of the Furnace/Air Conditioner.
  • Clean the cooling coils with a HEPA vacuum and a coil cleaner.
  • Clean the Blower unit
Step 2: Clean the supply and return registers and grills.
  • Remove wall, ceiling and Floor registers.
  • Wash Register with cleaner and rinse.
Step 3: Clean the supply and return ducts.
  • Clean all air ducts using powerful duct cleaning equipment.
Direct Contact Method:
This method involves the use of a vacuum with High Efficiency Particulate Air (HEPA) filtration. There is direct contact between the brush head that rotates through the ducts and the interior of duct surfaces to dislodge and remove dirt and debris. 

Negative Air Method:

This method uses compressed air into the duct system through a hose with a special nozzle, while the duct system is under negative air pressure. This nozzle is designed so that the compressed air propels it inside the duct while dislodging dirt and debris. The dislodged dirt and debris become airborne and are drawn down through the duct and out of the system by the high power vacuum equipment. 

Step 4: Install electrostatic air filter and odor control products. (Optional)
  • Decontaminate cleaned ducts with sealant, and Odor Deodorizer
Visit Comprehensive Mold Management's website for more information at www.compmold.com