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Quality Work … Since 1927!
  • “ Thank you and your staff for your help this holiday weekend! …your family installed my dad’s first furnace in 1955 & every one since. What a legacy! ”
    - Dorothy Flynn
  • “ You have an excellent team, Mr. Doornbos. ”
    - Jeanne Sencion
  • “ You and all the people we dealt with were really nice. If we can ever recommend your company to anyone, we certainly will. ”
    - Ray Szarzynski
  • “ I called Doornbos because my cousin said your company is honest and competent. He was right!! ”
    - Karen Darr
  • “ I have been dealing with Doornbos for over fifty years. Thank you. ”
    - Robert Ulatoski
  • “ It’s awfully nice to know there are still people like you out there when you need someone's help. ”
    - Dave Gaichas & Family
  • “ I told all of my co-workers to call Doornbos! They are the best! ”
    -Mr. & Mrs. Yodka
  • “ Doornbos always comes through and will always be my first choice in my heating and air conditioning needs. ”
    - Joe Kriss
  • “ Thank you for keeping the great service your company has been providing its grateful customers for nearly a century. ”
    - Bernice and Jim
  • “ I will always call your company for service. Thank you so much for an excellent job. ”
    - Mrs. W. Gragido
  • “ The service technicians that respond to our needs have been of great support and help to our skilled maintenance staff. ”
    - William Glotz, Maintenance Manager
  • “ I would like to commend Doornbos Heating and Air Conditioning for outstanding service and professional
    workmanship. ”

    - Don Dreher

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Repairing and Maintaining your Ducts

If you suspect you have poorly performing ducts, EPA recommends using a professional contractor for duct improvements. Usually, contractors who install heating and cooling systems also repair ductwork.
Typically, when making improvements to your duct system, a contractor will:

  • Inspect the whole duct system, including attic and crawl spaces. The contractor will measure air flow and duct leakage with diagnostic equipment and remove registers and grills to ensure that ducts are properly connected.
  • Evaluate how well the system’s supply air and return air is balanced for better air flow. Many systems have air return ducts that are too small. Re-evaluate airflow after repairs are completed.
  • Seal all leaks and connections with mastic, metal tape, or an aerosol-based sealant. Duct tape should never be used because it will not last.
  • Seal all registers and grills tightly to the ducts.
  • Insulate ducts in unconditioned areas, like attics and crawl spaces, with duct insulation that carries an R value of 6 or higher.
  • Repair damaged and disconnected ducts and straighten out flexible ducts that are tangled or crushed.
  • Include a new filter as part of any duct system improvements.
  • To make sure there is no backdrafting of gas or oil-burning appliances, conduct a combustion safety test after ducts are sealed.

Copyright U.S. Environmental Protection Agency

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