hdr facility

Certifications

  • Accredited Quality Contractor - Associated Builders and Contractors, Inc.
    First AQC in the North Alabama region.
  • American Welding Society
    Certified Welding Inspector on staff.
  • Safety and Health Management (ISHM)
    Certified Safety and Health Manager (CSHM) on staff.
  • Alabama State Board of Heating, Air Conditioning and Refrigeration Contractors
    State Licensed Contractor.
  • Alabama Plumbers and Gas Fitters Examining Board
    State Licensed Contractor.
  • National Institute for Testing and Certification
    Certified Medical Gas Installer/Brazers.
  • National Air Duct Cleaners Association
    Certified Air Systems Cleaning Specialist on staff.
  • LEED Accredited Professionals

Spiral Ductwork Certification

We have a spiral duct certification from Certaire Technical Services, an independent testing laboratory specializing in the air moving industry. This certification states that our spiral duct meets SMACNA class III leakage requirement for Pressures -2 to +10. Duct sizes include the even sizes between 4”-42”diameter. This certification enables us to use M&D spiral duct on jobs with certification requirements. We are also able to sell M&D spiral duct and provide documentation of a quality product.

P.O. Box 2629       1810 Sherman St S.E.,  Decatur, AL 35601       Phone: 256-350-6568
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