Why should you get your air ducts cleaned?

Answer: Because they get dirty!

In addition to normal accumulations of dust and dirt found in all homes through regular use, there are several other factors that can increase the need for air duct cleaning:

  • Pets
  • Occupants with allergies or asthma
  • Cigarette or cigar smoke (like the nicotine and tar stained duct to the right)
  • Water contamination or damage to the home’s HVAC system
  • Home renovation or remodeling projects

Some occupants are more sensitive to these contaminants than others. Allergy and asthma sufferers, as well as babies, young children and the elderly tend to be more susceptible to the types of poor indoor air quality that the air duct cleaning can help to address.


Should brand new homes have their ducts cleaned?

Answer: Yes! The problem is in the mud!

Nail heads & seams are filled with joint compound (mud) which contains 2 – 5% of the material Crystalline Silica and is classified as a known human  carcinogen. When the dried mud is sanded, respirable dust is released into  the air. This means the particles are a size that can be drawn into the lungs  through the normal breathing process. This residue invades both the supply & return  systems during construction and should be removed.  Each time the blower fan  comes on, the particles of Crystalline Silica blow back into the air and into your  family’s lungs. Compared to the cost of the construction and the potential danger to the occupants, the expense of a complete air duct cleaning is trivial.

How is it done?

  • First the vacuum and compressed air equipment are set up and attached to your HVAC system.  If needed, drop cloths will be laid out to protect the floor where the vacuum hose is brought in.
  • Before any work is begun our tech will cycle your HVAC system’s power.  This is to ensure it is functioning properly.
  • Holes will be cut in the trunk duct work in strategic locations to accommodate our vacuum hoses.
  • The vacuum hoses are connected and cleaning commences.
  • Cleaning is performed by agitating the duct by air washing, air whips, and if necessary brushes first at each grille and then in the trunk duct. This is to ensure that all contaminants are removed from your HVAC system.
  • The above procedure will be performed on both the supply and return ducts.
  • The air handling unit will be thoroughly cleaned
  • Once complete your system will be resealed and restarted
  • A report with before and after pictures will be submitted to you within a few days of our visit documenting what was accomplished and what you got for your money.


Application of Anti-Microbial Spray

Under certain conditions, it is advisable to apply an anti-microbial spray onto hard metal duct surfaces. These conditions include visible signs of mold or other  odor-causing contamination. Anti-microbial sprays are designed to eliminate  odors associated with bacteria, mold, mildew, smoke, animals, cooking and spoilages. Complete cleaning must always precede the application of liquid  products. We only use products listed by EPA for use inside ductwork.

Take Note that the best option for mold/mildew contaminated fiberglass ductboard or lined metal ductwork is total removal and replacement.  If this is not an option for you we will clean the duct and apply an antimicrobial coating to seal and resurface the insulation. This is a temporary fix and we cannot stress enough that the best option for contaminated fiberglass is removal.


Coil Cleaning

Coil cleaning is a necessary part of good HVAC system maintenance.  Routine  duct cleaning includes a light cleaning of coils using vacuum and/or high  pressure air washing.  If light cleaning is not sufficient, deeper cleaning using power sprayers and chemicals may be required. It is not always possible to adequately clean coils without disassembly.



We have the capability to travel through the ductwork with a video camera to look for obstructions, contamination, duct integrity, etc. We can document this and provide the customer with a DVD video copy. Call to discuss pricing.

At Pur-Vent we treat our residential customers just as we would our large customers.  There will be no hidden costs in the middle of the job.  The scope of the work and the price will be agreed upon up front and a service contract will be signed by both parties, that way there will be no surprises later.  If on the initial inspection we find that your ductwork doesn’t need cleaning then we’ll let you know. Just keep us in mind for the next inspection and don’t forget us for your future duct cleaning projects.

For more information read NADCAs publication “What you Need to Know About Duct Cleaning”  and/or watch their short movies in our media section.