Air Duct Services

Ensure Safe, Efficient operation of your home comfort system while maintaining a healthy indoor environment. MM Comfort Systems uses professional, friendly and qualified technicians to provide the following services:

  • Duct Testing - Determine how much conditioned air is escaping into your crawl / attic. Now required by WA State Energy Code for new installations. (Why is duct testing important? Click here).
  • Duct Sealing - The single biggest source of wasted energy in the typical home is leaky duct work. Professional sealing reduces energy costs, reduces a homes "carbon footprint" improves indoor air quality.
  • Duct Insulation -
  • Duct Cleaning - The following steps are an overview of the duct cleaning process. The contractor you select should provide all of these services to deliver the best results possible.
  1. Inspect the entire system prior to cleaning. This includes testing the system to make sure it is operating properly.
  2. Remove furnace filter, wrap it in plastic and reinstall it in order to separate the supply and return sides of the system.
  3. Create an access hole in the ductwork on the return side.
  4. Connect the flexible vacuum hose to the ductwork.
  5. Mask off the return grill(s) to ensure a strong vacuum and increase air velocity.
  6. Stage the compresses air hose, air tools and brushes at the return grills.
  7. Start the vacuum source and check for proper negative pressure.
  8. Starting at the furthest grill, clean the grill and duct work with the air tools and brushes.
  9. Once the return side has been thoroughly cleaned, repeat steps 3 through 8 on the supply side.
  10. Clean the coils, blower and the rest of the furnace internals.
  11. If the system has been contaminated by water intrusion or smoke, sanitizers or sealants may be applied using ultra-low volume sprayers.
  12. After the system has been thoroughly cleaned and sanitized, all access holes are resealed and the system is started to verify proper operation.
  • Install / Service Indoor Air Quality accessories

Click here to watch a Duct Sealing Video produced by Washington State University